{"id":19427,"date":"2025-08-19T22:52:47","date_gmt":"2025-08-19T14:52:47","guid":{"rendered":"https:\/\/92it.top\/?p=19427"},"modified":"2025-08-20T09:24:33","modified_gmt":"2025-08-20T01:24:33","slug":"java-%e5%a0%86%e6%a0%88-%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f%f0%9f%8c%80","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=19427","title":{"rendered":"Java \u5806\u6808 \u662f\u4ec0\u4e48\uff1f\ud83c\udf00"},"content":{"rendered":"\n<p><strong>\u80cc\u666f<\/strong> \ud83d\udd16<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"523\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-233-1024x523.png\" alt=\"\" class=\"wp-image-19428\" style=\"width:458px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-233-1024x523.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-233-300x153.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-233-768x392.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-233-830x424.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-233-230x117.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-233-350x179.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-233-480x245.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-233.png 1132w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>Java\u7a0b\u5e8f\u5728\u8fd0\u884c\u65f6\uff0c\u9700\u8981\u5728\u5185\u5b58\u4e2d\u5206\u914d\u7a7a\u95f4\u3002\u4e3a\u4e86\u63d0\u9ad8\u8fd0\u884c\u6548\u7387\uff0c\u5c31\u5bf9\u6570\u636e\u8fdb\u884c\u4e86\u4e0d\u540c\u7684\u7a7a\u95f4\u5212\u5206\u3002\u56e0\u4e3a\u6bcf\u4e00\u7247\u533a\u57df\u90fd\u6709\u7279\u5b9a\u7684\u6570\u636e\u5904\u7406\u65b9\u5f0f\u548c\u5185\u5b58\u7ba1\u7406\u65b9\u5f0f\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"531\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-235-1024x531.png\" alt=\"\" class=\"wp-image-19455\" style=\"width:430px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-235-1024x531.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-235-300x156.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-235-768x399.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-235-830x431.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-235-230x119.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-235-350x182.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-235-480x249.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/\u56fe\u7247-235.png 1322w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>1. \u65b9\u6cd5\u533a\uff08Method Area\uff09<\/strong>\ud83d\udd16<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u2b50 \u5b58\u50a8&nbsp;<strong>\u7c7b\u7684\u5143\u6570\u636e<\/strong>\uff08\u7c7b\u7ed3\u6784\u3001\u65b9\u6cd5\u5b57\u8282\u7801\u3001\u5e38\u91cf\u6c60\u3001\u9759\u6001\u53d8\u91cf\u7b49\uff09\uff0c\u662f\u6240\u6709\u7ebf\u7a0b\u5171\u4eab\u7684\u5185\u5b58\u533a\u57df\u3002<\/p>\n\n\n\n<p>\u76f8\u5f53\u4e8e\u7a0b\u5e8f\u7684 \u201c\u5b57\u5178\u5e93\u201d\uff0c\u8bb0\u5f55\u4e86\u6240\u6709\u52a0\u8f7d\u7684\u7c7b \u201c\u957f\u4ec0\u4e48\u6837\u201d\uff08\u7c7b\u540d\u3001\u7ee7\u627f\u5173\u7cfb\u3001\u65b9\u6cd5\u903b\u8f91\u7b49\uff09\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u7ec6\u8282<\/strong>\n<ul>\n<li>\u7c7b\u52a0\u8f7d\u5b50\u7cfb\u7edf\uff08\u56fe\u4e2d\u9876\u90e8\uff09\u4f1a\u628a&nbsp;<code>.class<\/code>&nbsp;\u6587\u4ef6\u7684\u5185\u5bb9\u89e3\u6790\u540e\uff0c\u5b58\u5165\u65b9\u6cd5\u533a\u3002<\/li>\n\n\n\n<li>\u65b9\u6cd5\u533a\uff08Method Area\uff09\u662f Java \u865a\u62df\u673a\uff08JVM\uff09\u8fd0\u884c\u65f6\u6570\u636e\u533a\u7684\u4e00\u90e8\u5206\uff0c\u5c5e\u4e8e\u6240\u6709\u7ebf\u7a0b\u5171\u4eab\u7684\u5185\u5b58\u533a\u57df\u3002\u5728 Java 8 \u4e4b\u524d\uff0c\u65b9\u6cd5\u533a\u662f\u5806\u7684\u4e00\u4e2a\u903b\u8f91\u90e8\u5206\uff0c\u6709\u4e2a\u6bd4\u8f83\u8457\u540d\u7684\u522b\u540d\u53eb\u505a \u201c\u6c38\u4e45\u4ee3\uff08PermGen\uff09\u201d \uff1bJava 8 \u53ca\u4ee5\u540e\uff0c\u65b9\u6cd5\u533a\u7684\u5b9e\u73b0\u88ab\u66ff\u6362\u4e3a\u5143\u7a7a\u95f4\uff08Metaspace\uff09\uff0c\u4f7f\u7528\u672c\u5730\u5185\u5b58\u800c\u4e0d\u662f Java \u5806\u5185\u5b58\uff0c\u907f\u514d\u4e86\u65b9\u6cd5\u533a\u5185\u5b58\u6ea2\u51fa\u7684\u4e00\u4e9b\u5386\u53f2\u95ee\u9898\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u65b9\u6cd5\u533a\u5b58\u50a8\u7684\u5185\u5bb9<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u7c7b\u7684\u5143\u6570\u636e<\/strong>\uff1a\u5305\u62ec\u7c7b\u7684\u57fa\u672c\u4fe1\u606f\uff0c\u5982\u7c7b\u540d\u3001\u8bbf\u95ee\u4fee\u9970\u7b26\u3001\u7236\u7c7b\u3001\u5b9e\u73b0\u7684\u63a5\u53e3\u5217\u8868\uff1b\u7c7b\u7684\u5b57\u6bb5\u4fe1\u606f\uff0c\u5305\u62ec\u5b57\u6bb5\u540d\u3001\u7c7b\u578b\u3001\u8bbf\u95ee\u4fee\u9970\u7b26\uff1b\u7c7b\u7684\u65b9\u6cd5\u4fe1\u606f\uff0c\u5982\u65b9\u6cd5\u540d\u3001\u8fd4\u56de\u7c7b\u578b\u3001\u53c2\u6570\u5217\u8868\u3001\u65b9\u6cd5\u7684\u5b57\u8282\u7801\u3001\u5f02\u5e38\u8868\u7b49\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e<code>public class Person { private String name; public void setName(String name) { this.name = name; } }<\/code>&nbsp;\uff0c\u8fd9\u4e9b\u5173\u4e8e<code>Person<\/code>\u7c7b\u7684\u7ed3\u6784\u5b9a\u4e49\u90fd\u4f1a\u5b58\u50a8\u5728\u65b9\u6cd5\u533a\u3002<\/li>\n\n\n\n<li><strong>\u5e38\u91cf\u6c60<\/strong>\uff1a\u5206\u4e3a\u8fd0\u884c\u65f6\u5e38\u91cf\u6c60\u548c\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\u3002\n<ul>\n<li><strong>\u8fd0\u884c\u65f6\u5e38\u91cf\u6c60<\/strong>\uff1a\u662f\u7c7b\u6587\u4ef6\u4e2d\u5e38\u91cf\u6c60\u5728\u8fd0\u884c\u65f6\u7684\u8868\u793a\u5f62\u5f0f\uff0c\u5b58\u50a8\u7f16\u8bd1\u671f\u751f\u6210\u7684\u5404\u79cd\u5b57\u9762\u91cf\uff08\u5982\u6587\u672c\u5b57\u7b26\u4e32\u3001\u88ab\u58f0\u660e\u4e3a final \u7684\u5e38\u91cf\u503c\u7b49\uff09\u548c\u7b26\u53f7\u5f15\u7528\uff08\u5982\u7c7b\u548c\u63a5\u53e3\u7684\u5168\u9650\u5b9a\u540d\u3001\u5b57\u6bb5\u7684\u540d\u79f0\u548c\u63cf\u8ff0\u7b26\u3001\u65b9\u6cd5\u7684\u540d\u79f0\u548c\u63cf\u8ff0\u7b26 \uff09\u3002\u6bd4\u5982<code>String str = \"hello\";<\/code>&nbsp;\u4e2d\u7684<code>\"hello\"<\/code>\u5b57\u7b26\u4e32\u5b57\u9762\u91cf\uff0c\u4ee5\u53ca\u65b9\u6cd5\u8c03\u7528\u65f6\u5bf9\u5176\u4ed6\u7c7b\u65b9\u6cd5\u7684\u7b26\u53f7\u5f15\u7528\uff0c\u90fd\u4f1a\u5728\u8fd0\u884c\u65f6\u5e38\u91cf\u6c60\u4e2d\u4f53\u73b0\u3002<\/li>\n\n\n\n<li><strong>\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60<\/strong>\uff1a\u4e13\u95e8\u7528\u4e8e\u5b58\u50a8\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u5f53\u4f7f\u7528\u5b57\u7b26\u4e32\u5b57\u9762\u91cf\u521b\u5efa\u5b57\u7b26\u4e32\u65f6\uff08\u5982<code>String s = \"world\";<\/code>\uff09\uff0cJVM \u4f1a\u5148\u68c0\u67e5\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\u4e2d\u662f\u5426\u5df2\u7ecf\u5b58\u5728\u8be5\u5b57\u7b26\u4e32\uff0c\u5982\u679c\u5b58\u5728\u5219\u76f4\u63a5\u8fd4\u56de\u5f15\u7528\uff0c\u4e0d\u5b58\u5728\u5219\u5728\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\u4e2d\u521b\u5efa\u8be5\u5b57\u7b26\u4e32\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u9759\u6001\u53d8\u91cf<\/strong>\uff1a\u88ab<code>static<\/code>\u4fee\u9970\u7684\u53d8\u91cf\uff0c\u5176\u751f\u547d\u5468\u671f\u4e0e\u7c7b\u76f8\u540c\uff0c\u5b58\u50a8\u5728\u65b9\u6cd5\u533a\u4e2d\u3002\u6bd4\u5982<code>public class Utils { public static int count = 0; }<\/code>&nbsp;\u4e2d\u7684<code>count<\/code>\u53d8\u91cf\uff0c\u5c31\u5b58\u653e\u5728\u65b9\u6cd5\u533a\uff0c\u6240\u6709\u5bf9<code>Utils.count<\/code>\u7684\u8bbf\u95ee\u548c\u4fee\u6539\uff0c\u64cd\u4f5c\u7684\u90fd\u662f\u65b9\u6cd5\u533a\u4e2d\u7684\u8fd9\u4e2a\u53d8\u91cf\u3002<\/li>\n\n\n\n<li><strong>\u5373\u65f6\u7f16\u8bd1\uff08JIT\uff09\u540e\u7684\u4ee3\u7801<\/strong>&nbsp;\uff1a\u5728 Java \u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0cJVM \u7684\u5373\u65f6\u7f16\u8bd1\u5668\u4f1a\u5c06\u70ed\u70b9\u4ee3\u7801\uff08\u9891\u7e41\u6267\u884c\u7684\u65b9\u6cd5\u7b49\uff09\u7f16\u8bd1\u4e3a\u672c\u5730\u673a\u5668\u7801\u4ee5\u63d0\u9ad8\u6267\u884c\u6548\u7387\uff0c\u7f16\u8bd1\u540e\u7684\u672c\u5730\u673a\u5668\u7801\u4e5f\u4f1a\u5b58\u653e\u5728\u65b9\u6cd5\u533a\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u65b9\u6cd5\u533a\u7684\u4f5c\u7528<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u652f\u6301\u7c7b\u7684\u52a0\u8f7d\u4e0e\u8fd0\u884c<\/strong>\uff1a\u7c7b\u52a0\u8f7d\u5b50\u7cfb\u7edf\u5c06<code>.class<\/code>\u6587\u4ef6\u52a0\u8f7d\u5230 JVM \u65f6\uff0c\u4f1a\u628a\u89e3\u6790\u51fa\u6765\u7684\u7c7b\u7684\u5143\u6570\u636e\u4fe1\u606f\u5b58\u50a8\u5230\u65b9\u6cd5\u533a\u3002\u540e\u7eed JVM \u6267\u884c Java \u7a0b\u5e8f\uff0c\u6267\u884c\u5f15\u64ce\u5728\u6267\u884c\u65b9\u6cd5\u65f6\uff0c\u9700\u8981\u4ece\u65b9\u6cd5\u533a\u83b7\u53d6\u7c7b\u7684\u7ed3\u6784\u4fe1\u606f\u3001\u65b9\u6cd5\u5b57\u8282\u7801\u7b49\u5185\u5bb9\uff0c\u6765\u786e\u5b9a\u65b9\u6cd5\u7684\u53c2\u6570\u5217\u8868\u3001\u8bbf\u95ee\u6743\u9650\u7b49\uff0c\u8fdb\u800c\u6b63\u786e\u6267\u884c\u65b9\u6cd5\u3002<\/li>\n\n\n\n<li><strong>\u5b9e\u73b0\u5e38\u91cf\u7684\u5171\u4eab\u4e0e\u7ba1\u7406<\/strong>\uff1a\u5e38\u91cf\u6c60\u4f7f\u5f97\u76f8\u540c\u7684\u5b57\u9762\u91cf\u548c\u7b26\u53f7\u5f15\u7528\u53ef\u4ee5\u88ab\u591a\u4e2a\u7c7b\u6216\u65b9\u6cd5\u5171\u4eab\uff0c\u907f\u514d\u91cd\u590d\u5b58\u50a8\uff0c\u63d0\u9ad8\u5185\u5b58\u5229\u7528\u7387\u3002\u6bd4\u5982\u591a\u4e2a\u7c7b\u4e2d\u90fd\u4f7f\u7528\u5230\u5b57\u7b26\u4e32<code>\"java\"<\/code>&nbsp;\uff0c\u5728\u5e38\u91cf\u6c60\u4e2d\u53ea\u4f1a\u5b58\u50a8\u4e00\u4efd\uff0c\u5404\u4e2a\u5730\u65b9\u90fd\u5f15\u7528\u8fd9\u4e00\u4efd\uff0c\u8282\u7701\u4e86\u5185\u5b58\u7a7a\u95f4\u3002<\/li>\n\n\n\n<li><strong>\u63d0\u4f9b\u9759\u6001\u53d8\u91cf\u7684\u5b58\u50a8\u4e0e\u8bbf\u95ee<\/strong>\uff1a\u4e3a\u9759\u6001\u53d8\u91cf\u63d0\u4f9b\u4e86\u7edf\u4e00\u7684\u5b58\u50a8\u4f4d\u7f6e\uff0c\u65b9\u4fbf\u4e0d\u540c\u7ebf\u7a0b\u5bf9\u9759\u6001\u53d8\u91cf\u8fdb\u884c\u8bbf\u95ee\u548c\u4fee\u6539\uff0c\u4fdd\u8bc1\u4e86\u9759\u6001\u53d8\u91cf\u5728\u7c7b\u7684\u751f\u547d\u5468\u671f\u5185\u7684\u552f\u4e00\u6027\u548c\u53ef\u8bbf\u95ee\u6027\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>Java 8 \u524d\u540e\u65b9\u6cd5\u533a\u5b9e\u73b0\u7684\u5dee\u5f02<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>Java 7 \u53ca\u4e4b\u524d<\/strong>\uff1a\u4f7f\u7528\u6c38\u4e45\u4ee3\u5b9e\u73b0\u65b9\u6cd5\u533a\uff0c\u6c38\u4e45\u4ee3\u5728 Java \u5806\u4e2d\u5212\u5206\u51fa\u4e00\u5757\u533a\u57df\u6765\u5b58\u50a8\u65b9\u6cd5\u533a\u6570\u636e\u3002\u4f46\u8fd9\u79cd\u65b9\u5f0f\u5b58\u5728\u4e00\u4e9b\u95ee\u9898\uff0c\u6bd4\u5982\u6c38\u4e45\u4ee3\u7684\u5927\u5c0f\u5728\u542f\u52a8\u65f6\u9700\u8981\u9884\u5148\u8bbe\u7f6e\uff0c\u5f88\u96be\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8fdb\u884c\u52a8\u6001\u8c03\u6574\uff0c\u5982\u679c\u8bbe\u7f6e\u8fc7\u5c0f\uff0c\u5bb9\u6613\u5bfc\u81f4\u6c38\u4e45\u4ee3\u5185\u5b58\u6ea2\u51fa\uff08<code>java.lang.OutOfMemoryError: PermGen space<\/code>&nbsp;\uff09\uff1b\u5982\u679c\u8bbe\u7f6e\u8fc7\u5927\uff0c\u53c8\u4f1a\u6d6a\u8d39\u5185\u5b58\u3002<\/li>\n\n\n\n<li><strong>Java 8 \u53ca\u4e4b\u540e<\/strong>\uff1a\u5f15\u5165\u5143\u7a7a\u95f4\u6765\u66ff\u4ee3\u6c38\u4e45\u4ee3\u5b9e\u73b0\u65b9\u6cd5\u533a\uff0c\u5143\u7a7a\u95f4\u4f7f\u7528\u672c\u5730\u5185\u5b58\uff08Native Memory\uff09\uff0c\u800c\u4e0d\u662f Java \u5806\u5185\u5b58\u3002\u5143\u7a7a\u95f4\u7684\u5927\u5c0f\u4e0d\u518d\u50cf\u6c38\u4e45\u4ee3\u90a3\u6837\u53d7\u5230 Java \u5806\u5927\u5c0f\u7684\u9650\u5236\uff0c\u800c\u662f\u7531\u7cfb\u7edf\u7684\u53ef\u7528\u5185\u5b58\u51b3\u5b9a\u3002\u540c\u65f6\uff0c\u5143\u7a7a\u95f4\u5728\u5185\u5b58\u7ba1\u7406\u4e0a\u66f4\u52a0\u7075\u6d3b\u9ad8\u6548\uff0c\u80fd\u6839\u636e\u8fd0\u884c\u65f6\u7684\u9700\u8981\u52a8\u6001\u5206\u914d\u548c\u91ca\u653e\u5185\u5b58\uff0c\u964d\u4f4e\u4e86\u5185\u5b58\u6ea2\u51fa\u7684\u98ce\u9669\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u65b9\u6cd5\u533a\u4e0e\u5176\u4ed6\u8fd0\u884c\u65f6\u6570\u636e\u533a\u7684\u4ea4\u4e92<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u4e0e Java \u5806<\/strong>\uff1aJava \u5806\u7528\u4e8e\u5b58\u50a8\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u800c\u5bf9\u8c61\u6240\u5c5e\u7c7b\u7684\u5143\u6570\u636e\u4fe1\u606f\u5728\u65b9\u6cd5\u533a\u3002\u5f53\u901a\u8fc7<code>new<\/code>\u5173\u952e\u5b57\u521b\u5efa\u5bf9\u8c61\u65f6\uff0cJVM \u9700\u8981\u5148\u5728\u65b9\u6cd5\u533a\u83b7\u53d6\u7c7b\u7684\u5143\u6570\u636e\uff0c\u786e\u8ba4\u7c7b\u7684\u7ed3\u6784\u3001\u6784\u9020\u51fd\u6570\u7b49\u4fe1\u606f\uff0c\u7136\u540e\u5728 Java \u5806\u4e2d\u5206\u914d\u5185\u5b58\u6765\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\u3002<\/li>\n\n\n\n<li><strong>\u4e0e Java \u6808<\/strong>\uff1aJava \u6808\u7528\u4e8e\u5b58\u50a8\u7ebf\u7a0b\u6267\u884c\u65b9\u6cd5\u65f6\u7684\u6808\u5e27\u3002\u5f53\u7ebf\u7a0b\u8c03\u7528\u4e00\u4e2a\u65b9\u6cd5\u65f6\uff0cJVM \u4f1a\u5728 Java \u6808\u4e2d\u521b\u5efa\u5bf9\u5e94\u7684\u6808\u5e27\uff0c\u540c\u65f6\u9700\u8981\u4ece\u65b9\u6cd5\u533a\u83b7\u53d6\u8be5\u65b9\u6cd5\u7684\u5b57\u8282\u7801\u6307\u4ee4\u7b49\u4fe1\u606f\uff0c\u6765\u9a71\u52a8\u65b9\u6cd5\u7684\u6267\u884c\u3002\u65b9\u6cd5\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u6d89\u53ca\u5230\u5bf9\u7c7b\u7684\u9759\u6001\u53d8\u91cf\u3001\u5e38\u91cf\u7684\u8bbf\u95ee\uff0c\u4e5f\u662f\u4ece\u65b9\u6cd5\u533a\u83b7\u53d6\u76f8\u5e94\u7684\u6570\u636e\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u603b\u4e4b\uff0c\u65b9\u6cd5\u533a\u5728 Java \u7a0b\u5e8f\u7684\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u626e\u6f14\u7740\u81f3\u5173\u91cd\u8981\u7684\u89d2\u8272\uff0c\u5b83\u4e3a\u7c7b\u7684\u52a0\u8f7d\u3001\u8fd0\u884c\u63d0\u4f9b\u4e86\u5fc5\u8981\u7684\u5143\u6570\u636e\u548c\u6570\u636e\u5b58\u50a8\u652f\u6301\uff0c\u662f Java \u865a\u62df\u673a\u80fd\u591f\u6b63\u786e\u6267\u884c Java \u7a0b\u5e8f\u7684\u5173\u952e\u7ec4\u4ef6\u4e4b\u4e00\u3002<\/p>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>2.Java \u5806\uff08Java Heap\uff09<\/strong>\ud83d\udd16<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u2b50 \u5b58\u50a8&nbsp;<strong>\u5bf9\u8c61\u5b9e\u4f8b<\/strong>\uff08<code>new<\/code>&nbsp;\u51fa\u6765\u7684\u5bf9\u8c61\uff09\u548c\u6570\u7ec4\uff0c\u662f JVM \u4e2d\u6700\u5927\u7684\u5185\u5b58\u533a\u57df\uff0c<strong>\u6240\u6709\u7ebf\u7a0b\u5171\u4eab<\/strong>\u3002\u51e0\u4e4e\u6240\u6709\u7684\u5bf9\u8c61\u5b9e\u4f8b\u4ee5\u53ca\u6570\u7ec4\u90fd\u5728\u5806\u4e0a\u5206\u914d\u5185\u5b58\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u7c7b\u6bd4<\/strong>\uff1a\u76f8\u5f53\u4e8e\u7a0b\u5e8f\u7684 \u201c\u4ed3\u5e93\u201d\uff0c\u6240\u6709\u5bf9\u8c61\u7684 \u201c\u5b9e\u4f53\u201d \u90fd\u5b58\u5728\u8fd9\u91cc\uff0c\u6bd4\u5982&nbsp;<code>new User()<\/code>&nbsp;\u521b\u5efa\u7684\u7528\u6237\u5bf9\u8c61\u3001<code>new ArrayList()<\/code>&nbsp;\u521b\u5efa\u7684\u96c6\u5408\u5bf9\u8c61\u3002<\/li>\n\n\n\n<li><strong>\u7ec6\u8282<\/strong>\uff1a\n<ul>\n<li>\u5783\u573e\u56de\u6536\uff08GC\uff09\u7684\u4e3b\u8981\u6218\u573a\uff1aJVM \u7684\u5783\u573e\u56de\u6536\u5668\uff08\u5982 G1\u3001CMS\uff09\u4f1a\u5b9a\u671f\u626b\u63cf\u5806\uff0c\u56de\u6536\u4e0d\u518d\u4f7f\u7528\u7684\u5bf9\u8c61\uff0c\u91ca\u653e\u5185\u5b58\u3002<\/li>\n\n\n\n<li>\u5806\u5185\u5b58\u53ef\u5206\u4e3a \u201c\u65b0\u751f\u4ee3\u201d\uff08Eden\u3001Survivor\uff09\u548c \u201c\u8001\u5e74\u4ee3\u201d\uff0c\u7528\u4e8e\u4f18\u5316\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\u7ba1\u7406\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u4f5c\u7528\u4e0e\u529f\u80fd<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u5bf9\u8c61\u5185\u5b58\u5206\u914d<\/strong>\uff1aJava \u7a0b\u5e8f\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u901a\u8fc7<code>new<\/code>\u5173\u952e\u5b57\u521b\u5efa\u7684\u5bf9\u8c61\uff0c\u90fd\u4f1a\u5728 Java \u5806\u4e2d\u5206\u914d\u5185\u5b58\u7a7a\u95f4\u3002\u6bd4\u5982<code>Person person = new Person();<\/code>\uff0c\u8fd9\u91cc\u521b\u5efa\u7684<code>Person<\/code>\u5bf9\u8c61\u7684\u5b9e\u4f8b\u6570\u636e\uff0c\u50cf\u5bf9\u8c61\u7684\u5c5e\u6027\u503c\uff08\u5982\u679c<code>Person<\/code>\u7c7b\u6709<code>name<\/code>\u3001<code>age<\/code>\u7b49\u5c5e\u6027\uff09\uff0c\u90fd\u4f1a\u5b58\u50a8\u5728 Java \u5806\u4e2d\u3002<\/li>\n\n\n\n<li><strong>\u6570\u7ec4\u5185\u5b58\u5206\u914d<\/strong>\uff1a\u9664\u4e86\u5bf9\u8c61\uff0c\u6570\u7ec4\u4e5f\u662f\u5728 Java \u5806\u4e2d\u5206\u914d\u5185\u5b58\u3002\u65e0\u8bba\u662f\u57fa\u672c\u6570\u636e\u7c7b\u578b\u7684\u6570\u7ec4\uff08\u5982<code>int[] arr = new int[10];<\/code>\uff09\uff0c\u8fd8\u662f\u5f15\u7528\u6570\u636e\u7c7b\u578b\u7684\u6570\u7ec4\uff08\u5982<code>String[] strArray = new String[5];<\/code>\uff09\uff0c\u5176\u5185\u5b58\u7a7a\u95f4\u90fd\u6765\u81ea Java \u5806\u3002\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u6570\u636e\u6216\u8005\u5143\u7d20\u7684\u5f15\u7528\uff0c\u90fd\u5b58\u50a8\u5728\u5806\u4e0a\u3002<\/li>\n\n\n\n<li><strong>\u5783\u573e\u56de\u6536\u4e3b\u8981\u533a\u57df<\/strong>\uff1aJava \u5806\u662f\u5783\u573e\u56de\u6536\uff08Garbage Collection\uff0c\u7b80\u79f0 GC\uff09\u7684\u4e3b\u8981\u5de5\u4f5c\u533a\u57df\u3002\u968f\u7740\u7a0b\u5e8f\u7684\u8fd0\u884c\uff0c\u4f1a\u4e0d\u65ad\u521b\u5efa\u5bf9\u8c61\uff0c\u5f53\u8fd9\u4e9b\u5bf9\u8c61\u4e0d\u518d\u88ab\u5f15\u7528\uff08\u5373\u6210\u4e3a\u5783\u573e\u5bf9\u8c61\uff09\u65f6\uff0c\u5783\u573e\u56de\u6536\u5668\u4f1a\u5b9a\u671f\u626b\u63cf Java \u5806\uff0c\u56de\u6536\u8fd9\u4e9b\u4e0d\u518d\u4f7f\u7528\u7684\u5bf9\u8c61\u6240\u5360\u7528\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u4ee5\u4fbf\u91cd\u65b0\u5206\u914d\u7ed9\u65b0\u7684\u5bf9\u8c61\uff0c\u4ece\u800c\u5b9e\u73b0\u5185\u5b58\u7684\u9ad8\u6548\u5229\u7528\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u5185\u5b58\u7ed3\u6784<\/strong><\/p>\n\n\n\n<p>Java \u5806\u5728\u903b\u8f91\u4e0a\u53ef\u4ee5\u7ec6\u5206\u4e3a\u4e0d\u540c\u7684\u533a\u57df\uff0c\u5e38\u89c1\u7684\u5206\u4ee3\u7ed3\u6784\u5305\u62ec\u65b0\u751f\u4ee3\uff08Young Generation\uff09\u3001\u8001\u5e74\u4ee3\uff08Old Generation\uff09\uff0c\u90e8\u5206\u5783\u573e\u56de\u6536\u5668\u8fd8\u4f1a\u5212\u5206\u51fa\u6c38\u4e45\u4ee3\uff08Java 8 \u4e4b\u524d\uff09\u6216\u5143\u7a7a\u95f4\uff08Java 8 \u53ca\u4e4b\u540e\uff0c\u5143\u7a7a\u95f4\u672c\u8d28\u4e0d\u5c5e\u4e8e\u5806\uff0c\u4f46\u548c\u7c7b\u76f8\u5173\u7684\u90e8\u5206\u4fe1\u606f\u5b58\u50a8\u903b\u8f91\u7c7b\u4f3c\uff09\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u65b0\u751f\u4ee3<\/strong>\uff1a\u7528\u4e8e\u5b58\u653e\u65b0\u521b\u5efa\u7684\u5bf9\u8c61\uff0c\u53c8\u53ef\u8fdb\u4e00\u6b65\u7ec6\u5206\u4e3a\u4e00\u4e2a Eden \u533a\u548c\u4e24\u4e2a Survivor \u533a\uff08\u901a\u5e38\u79f0\u4e3a From Survivor \u548c To Survivor\uff09 \u3002\u5927\u591a\u6570\u65b0\u521b\u5efa\u7684\u5bf9\u8c61\u4f1a\u9996\u5148\u5206\u914d\u5728 Eden \u533a\uff0c\u5f53 Eden \u533a\u6ee1\u65f6\uff0c\u4f1a\u89e6\u53d1\u4e00\u6b21 Minor GC\uff08\u65b0\u751f\u4ee3\u5783\u573e\u56de\u6536\uff09\uff0c\u5b58\u6d3b\u4e0b\u6765\u7684\u5bf9\u8c61\u4f1a\u88ab\u79fb\u52a8\u5230 Survivor \u533a\u3002\u5728\u591a\u6b21 Minor GC \u540e\uff0c\u4f9d\u7136\u5b58\u6d3b\u7684\u5bf9\u8c61\u4f1a\u88ab\u664b\u5347\u5230\u8001\u5e74\u4ee3\u3002<\/li>\n\n\n\n<li><strong>\u8001\u5e74\u4ee3<\/strong>\uff1a\u7528\u4e8e\u5b58\u653e\u7ecf\u8fc7\u591a\u6b21\u5783\u573e\u56de\u6536\u540e\u4f9d\u7136\u5b58\u6d3b\u7684\u5bf9\u8c61\uff0c\u4ee5\u53ca\u4e00\u4e9b\u5927\u5bf9\u8c61\uff08\u8d85\u8fc7\u4e00\u5b9a\u5927\u5c0f\uff0c\u4f1a\u76f4\u63a5\u5728\u8001\u5e74\u4ee3\u5206\u914d\u5185\u5b58\uff09\u3002\u8001\u5e74\u4ee3\u7684\u5783\u573e\u56de\u6536\u9891\u7387\u76f8\u5bf9\u8f83\u4f4e\uff0c\u89e6\u53d1\u7684 Full GC\uff08\u5168\u5806\u5783\u573e\u56de\u6536\uff09\u4f1a\u56de\u6536\u6574\u4e2a Java \u5806\u7684\u5783\u573e\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u4e0e\u5176\u4ed6\u8fd0\u884c\u65f6\u6570\u636e\u533a\u7684\u5173\u7cfb<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u4e0e\u65b9\u6cd5\u533a<\/strong>\uff1a\u65b9\u6cd5\u533a\u5b58\u50a8\u7c7b\u7684\u5143\u6570\u636e\u4fe1\u606f\uff0c\u5982\u7c7b\u7684\u7ed3\u6784\u3001\u65b9\u6cd5\u5b57\u8282\u7801\u3001\u5e38\u91cf\u6c60\u7b49\u3002\u5f53\u901a\u8fc7<code>new<\/code>\u5173\u952e\u5b57\u521b\u5efa\u5bf9\u8c61\u65f6\uff0cJVM \u9700\u8981\u5148\u4ece\u65b9\u6cd5\u533a\u83b7\u53d6\u7c7b\u7684\u5143\u6570\u636e\uff0c\u786e\u8ba4\u7c7b\u7684\u7ed3\u6784\u3001\u6784\u9020\u51fd\u6570\u7b49\u4fe1\u606f\uff0c\u7136\u540e\u5728 Java \u5806\u4e2d\u5206\u914d\u5185\u5b58\u6765\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\u3002\u4f8b\u5982\uff0c\u521b\u5efa<code>new ArrayList&lt;&gt;()<\/code>&nbsp;\u65f6\uff0c\u8981\u5148\u5728\u65b9\u6cd5\u533a\u627e\u5230<code>ArrayList<\/code>\u7c7b\u7684\u76f8\u5173\u5143\u6570\u636e\uff0c\u518d\u5728\u5806\u4e2d\u521b\u5efa\u5177\u4f53\u7684<code>ArrayList<\/code>\u5bf9\u8c61\u3002<\/li>\n\n\n\n<li><strong>\u4e0e Java \u6808<\/strong>\uff1aJava \u6808\u662f\u7ebf\u7a0b\u79c1\u6709\u7684\uff0c\u5b58\u50a8\u7ebf\u7a0b\u6267\u884c\u65b9\u6cd5\u65f6\u7684\u6808\u5e27\uff0c\u5305\u62ec\u5c40\u90e8\u53d8\u91cf\u3001\u64cd\u4f5c\u6570\u6808\u7b49\u3002\u5f53\u65b9\u6cd5\u4e2d\u521b\u5efa\u5bf9\u8c61\u65f6\uff08\u5982<code>public void test() { Person p = new Person(); }<\/code>&nbsp;\uff09\uff0c\u5bf9\u8c61\u7684\u5f15\u7528\uff08\u5982<code>p<\/code>&nbsp;\uff09\u5b58\u50a8\u5728 Java \u6808\u7684\u5c40\u90e8\u53d8\u91cf\u8868\u4e2d\uff0c\u800c\u5bf9\u8c61\u7684\u5b9e\u9645\u6570\u636e\u5219\u5b58\u50a8\u5728 Java \u5806\u4e2d\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u5185\u5b58\u6ea2\u51fa\u95ee\u9898<\/strong><\/p>\n\n\n\n<p>\u5982\u679c Java \u5806\u7684\u5185\u5b58\u7a7a\u95f4\u4e0d\u8db3\u4ee5\u5206\u914d\u65b0\u7684\u5bf9\u8c61\uff0c\u5e76\u4e14\u5783\u573e\u56de\u6536\u5668\u4e5f\u65e0\u6cd5\u56de\u6536\u8db3\u591f\u7684\u5185\u5b58\uff0c\u5c31\u4f1a\u629b\u51fa<code>java.lang.OutOfMemoryError: Java heap space<\/code>\u5f02\u5e38\u3002\u5bfc\u81f4\u8fd9\u79cd\u60c5\u51b5\u7684\u539f\u56e0\u53ef\u80fd\u662f\u5bf9\u8c61\u521b\u5efa\u8fc7\u4e8e\u9891\u7e41\u3001\u5bf9\u8c61\u751f\u547d\u5468\u671f\u8fc7\u957f\u6ca1\u6709\u53ca\u65f6\u56de\u6536\u3001\u5185\u5b58\u6cc4\u6f0f\uff08\u5bf9\u8c61\u4e0d\u518d\u4f7f\u7528\uff0c\u4f46\u5f15\u7528\u6ca1\u6709\u91ca\u653e\uff0c\u5bfc\u81f4\u5783\u573e\u56de\u6536\u5668\u65e0\u6cd5\u56de\u6536\uff09\u7b49\u3002<\/p>\n\n\n\n<p>\u603b\u4e4b\uff0cJava \u5806\u662f Java \u7a0b\u5e8f\u8fd0\u884c\u65f6\u5b58\u50a8\u5bf9\u8c61\u548c\u6570\u7ec4\u7684\u6838\u5fc3\u533a\u57df\uff0c\u5176\u5185\u5b58\u7ba1\u7406\u548c\u5783\u573e\u56de\u6536\u673a\u5236\u5bf9\u4e8e\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u7a33\u5b9a\u6027\u8d77\u7740\u81f3\u5173\u91cd\u8981\u7684\u4f5c\u7528\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u4e00\u4e2a\u5bb9\u6613\u7406\u89e3\u7684\u4f8b\u5b50<\/strong><\/p>\n\n\n\n<p>\u53ef\u4ee5\u628a\u5806\u7406\u89e3\u4e3a\u4e00\u5bb6\u9910\u5385\uff0c\u91cc\u9762\u6709200\u5f20\u684c\u5b50\uff0c\u4e5f\u5c31\u662f\u6700\u591a\u80fd\u540c\u65f6\u5bb9\u7eb3200\u684c\u5ba2\u4eba\u5c31\u9910\uff0c\u6765\u4e00\u6279\u5ba2\u4eba\u5c31\u4e3a\u4ed6\u4eec\u5b89\u6392\u4e00\u4e9b\u684c\u5b50\uff0c\u5982\u679c\u67d0\u5929\u6765\u7684\u5ba2\u4eba\u7279\u522b\u591a\uff0c\u8d85\u8fc7200\u684c\u4e86\uff0c\u90a3\u5c31\u4e0d\u80fd\u518d\u63a5\u5f85\u8d85\u51fa\u7684\u5ba2\u4eba\u4e86\u3002\u5f53\u7136\uff0c\u8fdb\u6765\u5403\u996d\u7684\u5ba2\u4eba\u4e0d\u53ef\u80fd\u662f\u540c\u65f6\u7684\uff0c\u6709\u7684\u65e9\uff0c\u6709\u7684\u665a\uff0c\u5148\u5403\u597d\u7684\u5ba2\u4eba\uff0c\u8001\u677f\u4f1a\u5b89\u6392\u7ed9\u4ed6\u4eec\u7ed3\u8d26\u8d70\u4eba\uff0c\u7136\u540e\u7a7a\u51fa\u6765\u7684\u684c\u5b50\u53c8\u80fd\u63a5\u5f85\u65b0\u7684\u5ba2\u4eba\u3002\u8fd9\u91cc\uff0c\u5806\u5c31\u662f\u9910\u5385\uff0c\u6700\u5927\u5bb9\u91cf200\u684c\u5c31\u662f\u5806\u5185\u5b58\u7684\u5927\u5c0f\uff0c\u8001\u677f\u5c31\u76f8\u5f53\u4e8eGC(\u5783\u573e\u56de\u6536)\uff0c\u7ed9\u5ba2\u4eba\u5b89\u6392\u684c\u5b50\u5c31\u76f8\u5f53\u4e8ejava\u521b\u5efa\u5bf9\u8c61\u7684\u65f6\u5019\u5206\u914d\u5806\u5185\u5b58\uff0c\u7ed3\u8d26\u5c31\u76f8\u5f53\u4e8eGC\u56de\u6536\u5bf9\u8c61\u5360\u7528\u7684\u7a7a\u95f4\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>Java \u6808\uff08Java Stack\uff09<\/strong>\ud83d\udd16<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u2b50 <strong>\u7ebf\u7a0b\u79c1\u6709<\/strong>\uff0c\u5b58\u50a8\u7ebf\u7a0b\u6267\u884c\u65f6\u7684&nbsp;<strong>\u65b9\u6cd5\u8c03\u7528\u6808\u5e27<\/strong>\uff08\u6bcf\u4e2a\u65b9\u6cd5\u8c03\u7528\u5bf9\u5e94\u4e00\u4e2a\u6808\u5e27\uff09\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u7c7b\u6bd4<\/strong>\uff1a\u76f8\u5f53\u4e8e\u7ebf\u7a0b\u7684 \u201c\u5de5\u4f5c\u8bb0\u5f55\u672c\u201d\uff0c\u8bb0\u5f55\u7ebf\u7a0b\u5f53\u524d \u201c\u6b63\u5728\u6267\u884c\u4ec0\u4e48\u65b9\u6cd5\u201d\u201c\u65b9\u6cd5\u7684\u5c40\u90e8\u53d8\u91cf\u662f\u4ec0\u4e48\u201d\u3002<\/li>\n\n\n\n<li><strong>\u7ec6\u8282<\/strong>\uff1a\n<ul>\n<li>\u6808\u5e27\u5305\u542b\uff1a\u65b9\u6cd5\u7684\u5c40\u90e8\u53d8\u91cf\u3001\u65b9\u6cd5\u8c03\u7528\u7684\u8fd4\u56de\u5730\u5740\u3001\u64cd\u4f5c\u6570\u6808\uff08\u6267\u884c\u5b57\u8282\u7801\u6307\u4ee4\u65f6\u7684\u4e34\u65f6\u6570\u636e\uff09\u3002<\/li>\n\n\n\n<li>\u65b9\u6cd5\u8c03\u7528\u65f6\uff0c\u6808\u5e27\u5165\u6808\uff1b\u65b9\u6cd5\u6267\u884c\u5b8c\u6bd5\uff0c\u6808\u5e27\u51fa\u6808\uff08\u9075\u5faa \u201c\u5148\u8fdb\u540e\u51fa\u201d \u539f\u5219\uff09\u3002<\/li>\n\n\n\n<li>\u793a\u4f8b\uff1a\u8c03\u7528&nbsp;<code>main()<\/code>&nbsp;\u2192&nbsp;<code>doService()<\/code>&nbsp;\u2192&nbsp;<code>doDB()<\/code>\uff0cJava \u6808\u4f1a\u4f9d\u6b21\u538b\u5165&nbsp;<code>doDB<\/code>&nbsp;\u6808\u5e27 \u2192&nbsp;<code>doService<\/code>&nbsp;\u6808\u5e27 \u2192&nbsp;<code>main<\/code>&nbsp;\u6808\u5e27\uff0c\u6267\u884c\u5b8c&nbsp;<code>doDB<\/code>&nbsp;\u540e\u4f9d\u6b21\u5f39\u51fa\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Java \u6808\uff08Java Stack\uff09\u662f\u7ebf\u7a0b\u79c1\u6709\u7684\u5185\u5b58\u533a\u57df\uff0c\u7528\u4e8e\u8bb0\u5f55\u7ebf\u7a0b\u6267\u884c\u65b9\u6cd5\u65f6\u7684\u8c03\u7528\u8f68\u8ff9\u548c\u4e34\u65f6\u6570\u636e\uff0c\u9075\u5faa \u201c\u5148\u8fdb\u540e\u51fa\u201d\uff08FILO\uff09\u539f\u5219\u3002\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u5177\u4f53\u4f8b\u5b50\u548c\u56fe\u793a\u6765\u8be6\u7ec6\u8bf4\u660e\uff1a<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u4f8b\u5b50\uff1a\u65b9\u6cd5\u8c03\u7528\u94fe\u7684\u6808\u5e27\u53d8\u5316<\/strong><\/p>\n\n\n\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u7b80\u5355\u7684 Java \u7a0b\u5e8f\uff0c\u5305\u542b 3 \u4e2a\u65b9\u6cd5\u8c03\u7528\uff1a<code>main()<\/code>&nbsp;\u2192&nbsp;<code>methodA()<\/code>&nbsp;\u2192&nbsp;<code>methodB()<\/code>\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class StackDemo {\n    public static void main(String[] args) { \/\/ \u65b9\u6cd51\n        int a = 1;\n        methodA(a);\n    }\n\n    public static void methodA(int x) { \/\/ \u65b9\u6cd52\n        int b = 2;\n        methodB(x + b);\n    }\n\n    public static void methodB(int y) { \/\/ \u65b9\u6cd53\n        int c = 3;\n        System.out.println(y + c); \/\/ \u8f93\u51fa\uff1a6\uff081+2+3\uff09\n    }\n}<\/pre>\n\n\n\n<p>\u7a0b\u5e8f\u8fd0\u884c\u65f6\uff0cJava \u6808\u4f1a\u968f\u7740\u65b9\u6cd5\u8c03\u7528 \u201c\u538b\u6808\u201d\uff0c\u968f\u7740\u65b9\u6cd5\u6267\u884c\u5b8c\u6bd5 \u201c\u51fa\u6808\u201d\uff0c\u5177\u4f53\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u56fe\u793a\uff1aJava \u6808\u7684\u52a8\u6001\u53d8\u5316\u8fc7\u7a0b<\/strong><\/p>\n\n\n\n<p>\u25fe1. \u521d\u59cb\u72b6\u6001\uff1a\u4e3b\u7ebf\u7a0b\u542f\u52a8\uff0c\u6808\u4e3a\u7a7a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Java\u6808\uff08\u7ebf\u7a0b\u79c1\u6709\uff09\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502                 \u2502  \u2190 \u6808\u9876\uff08\u6682\u65e0\u6808\u5e27\uff09\n\u2502                 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/pre>\n\n\n\n<p>\u25fe2. \u6267\u884c<code>main()<\/code>\u65b9\u6cd5\uff1a\u6808\u5e27\u5165\u6808<\/p>\n\n\n\n<ul>\n<li>\u5f53<code>main()<\/code>\u65b9\u6cd5\u88ab\u8c03\u7528\u65f6\uff0cJVM \u5728 Java \u6808\u4e2d\u521b\u5efa\u4e00\u4e2a **<code>main<\/code>\u6808\u5e27 **\uff0c\u5305\u542b\uff1a\n<ul>\n<li>\u5c40\u90e8\u53d8\u91cf\uff1a<code>args<\/code>\uff08\u53c2\u6570\uff09\u3001<code>a=1<\/code>\uff1b<\/li>\n\n\n\n<li>\u64cd\u4f5c\u6570\u6808\uff1a\u6267\u884c\u5b57\u8282\u7801\u65f6\u7684\u4e34\u65f6\u6570\u636e\uff1b<\/li>\n\n\n\n<li>\u8fd4\u56de\u5730\u5740\uff1a\u65b9\u6cd5\u6267\u884c\u5b8c\u540e\u56de\u5230\u54ea\u91cc\uff08\u8fd9\u91cc\u662f JVM \u542f\u52a8\u5165\u53e3\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Java\u6808\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 main\u6808\u5e27        \u2502  \u2190 \u6808\u9876\uff08\u5f53\u524d\u6267\u884c\u65b9\u6cd5\uff09\n\u2502 - \u5c40\u90e8\u53d8\u91cf\uff1aargs, a=1\n\u2502 - \u8fd4\u56de\u5730\u5740\uff1aJVM\u5165\u53e3\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502                 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/pre>\n\n\n\n<p>\u25fe3.&nbsp;<code>main()<\/code>\u8c03\u7528<code>methodA()<\/code>\uff1a<code>methodA<\/code>\u6808\u5e27\u5165\u6808<\/p>\n\n\n\n<ul>\n<li><code>main()<\/code>\u4e2d\u6267\u884c<code>methodA(a)<\/code>\u65f6\uff0cJVM \u6682\u505c<code>main<\/code>\u6267\u884c\uff0c\u521b\u5efa **<code>methodA<\/code>\u6808\u5e27 ** \u538b\u5165\u6808\u9876\uff1a\n<ul>\n<li>\u5c40\u90e8\u53d8\u91cf\uff1a<code>x=1<\/code>\uff08\u63a5\u6536<code>main<\/code>\u4f20\u6765\u7684<code>a<\/code>\uff09\u3001<code>b=2<\/code>\uff1b<\/li>\n\n\n\n<li>\u8fd4\u56de\u5730\u5740\uff1a<code>main<\/code>\u65b9\u6cd5\u4e2d\u8c03\u7528<code>methodA<\/code>\u7684\u4e0b\u4e00\u884c\u4ee3\u7801\u4f4d\u7f6e\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Java\u6808\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 methodA\u6808\u5e27     \u2502  \u2190 \u6808\u9876\uff08\u5f53\u524d\u6267\u884c\u65b9\u6cd5\uff09\n\u2502 - \u5c40\u90e8\u53d8\u91cf\uff1ax=1, b=2\n\u2502 - \u8fd4\u56de\u5730\u5740\uff1amain\u7684\u8c03\u7528\u5904\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 main\u6808\u5e27        \u2502  \u2190 \u6682\u505c\u6267\u884c\n\u2502 - \u5c40\u90e8\u53d8\u91cf\uff1aargs, a=1\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502                 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/pre>\n\n\n\n<p>\u25fe4.&nbsp;<code>methodA()<\/code>\u8c03\u7528<code>methodB()<\/code>\uff1a<code>methodB<\/code>\u6808\u5e27\u5165\u6808<\/p>\n\n\n\n<ul>\n<li><code>methodA<\/code>\u4e2d\u6267\u884c<code>methodB(x + b)<\/code>\uff08\u8ba1\u7b97\u5f97<code>1+2=3<\/code>\uff09\uff0c\u521b\u5efa **<code>methodB<\/code>\u6808\u5e27 ** \u538b\u5165\u6808\u9876\uff1a\n<ul>\n<li>\u5c40\u90e8\u53d8\u91cf\uff1a<code>y=3<\/code>\uff08\u63a5\u6536<code>methodA<\/code>\u4f20\u6765\u7684\u7ed3\u679c\uff09\u3001<code>c=3<\/code>\uff1b<\/li>\n\n\n\n<li>\u8fd4\u56de\u5730\u5740\uff1a<code>methodA<\/code>\u4e2d\u8c03\u7528<code>methodB<\/code>\u7684\u4e0b\u4e00\u884c\u4ee3\u7801\u4f4d\u7f6e\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Java\u6808\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 methodB\u6808\u5e27     \u2502  \u2190 \u6808\u9876\uff08\u5f53\u524d\u6267\u884c\u65b9\u6cd5\uff09\n\u2502 - \u5c40\u90e8\u53d8\u91cf\uff1ay=3, c=3\n\u2502 - \u8fd4\u56de\u5730\u5740\uff1amethodA\u7684\u8c03\u7528\u5904\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 methodA\u6808\u5e27     \u2502  \u2190 \u6682\u505c\u6267\u884c\n\u2502 - \u5c40\u90e8\u53d8\u91cf\uff1ax=1, b=2\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 main\u6808\u5e27        \u2502  \u2190 \u6682\u505c\u6267\u884c\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502                 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/pre>\n\n\n\n<p>\u25fe5.&nbsp;<code>methodB()<\/code>\u6267\u884c\u5b8c\u6bd5\uff1a<code>methodB<\/code>\u6808\u5e27\u51fa\u6808<\/p>\n\n\n\n<ul>\n<li><code>methodB<\/code>\u6253\u5370\u7ed3\u679c\u540e\u6267\u884c\u5b8c\u6bd5\uff0c\u5176\u6808\u5e27\u4ece\u6808\u9876\u5f39\u51fa\uff0c\u7a0b\u5e8f\u56de\u5230<code>methodA<\/code>\u7684\u8fd4\u56de\u5730\u5740\u7ee7\u7eed\u6267\u884c\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Java\u6808\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 methodA\u6808\u5e27     \u2502  \u2190 \u6808\u9876\uff08\u6062\u590d\u6267\u884c\uff09\n\u2502 - \u5c40\u90e8\u53d8\u91cf\uff1ax=1, b=2\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 main\u6808\u5e27        \u2502\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502                 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/pre>\n\n\n\n<p>\u25fe6.&nbsp;<code>methodA()<\/code>\u6267\u884c\u5b8c\u6bd5\uff1a<code>methodA<\/code>\u6808\u5e27\u51fa\u6808<\/p>\n\n\n\n<ul>\n<li><code>methodA<\/code>\u7ee7\u7eed\u6267\u884c\u5269\u4f59\u4ee3\u7801\uff08\u65e0\u66f4\u591a\u64cd\u4f5c\uff09\uff0c\u6267\u884c\u5b8c\u6bd5\u540e\u6808\u5e27\u5f39\u51fa\uff0c\u7a0b\u5e8f\u56de\u5230<code>main<\/code>\u7684\u8fd4\u56de\u5730\u5740\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Java\u6808\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 main\u6808\u5e27        \u2502  \u2190 \u6808\u9876\uff08\u6062\u590d\u6267\u884c\uff09\n\u2502 - \u5c40\u90e8\u53d8\u91cf\uff1aargs, a=1\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502                 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/pre>\n\n\n\n<p>\u25fe7.&nbsp;<code>main()<\/code>\u6267\u884c\u5b8c\u6bd5\uff1a<code>main<\/code>\u6808\u5e27\u51fa\u6808<\/p>\n\n\n\n<ul>\n<li><code>main<\/code>\u65b9\u6cd5\u6267\u884c\u5b8c\u6bd5\uff0c\u6808\u5e27\u5f39\u51fa\uff0cJava \u6808\u4e3a\u7a7a\uff0c\u7a0b\u5e8f\u7ed3\u675f\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Java\u6808\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502                 \u2502  \u2190 \u6808\u4e3a\u7a7a\n\u2502                 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n\n<\/pre>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u6808\u5e27\u7684\u6838\u5fc3\u7ec4\u6210\uff08\u4ee5\u4e0a\u8ff0\u4f8b\u5b50\u4e3a\u4f8b\uff09<\/strong><\/p>\n\n\n\n<p>\u6bcf\u4e2a\u6808\u5e27\u5305\u542b 3 \u90e8\u5206\u5173\u952e\u4fe1\u606f\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u5c40\u90e8\u53d8\u91cf\u8868<\/strong>\uff1a\u5b58\u50a8\u65b9\u6cd5\u7684\u53c2\u6570\u548c\u5c40\u90e8\u53d8\u91cf\uff08\u5982<code>methodB<\/code>\u4e2d\u7684<code>y=3<\/code>\u3001<code>c=3<\/code>\uff09\u3002<\/li>\n\n\n\n<li><strong>\u64cd\u4f5c\u6570\u6808<\/strong>\uff1a\u6267\u884c\u5b57\u8282\u7801\u6307\u4ee4\u65f6\u7684\u4e34\u65f6\u6570\u636e\u533a\uff08\u5982\u8ba1\u7b97<code>x + b<\/code>\u65f6\uff0c\u4f1a\u5148\u5c06<code>x<\/code>\u548c<code>b<\/code>\u538b\u5165\u64cd\u4f5c\u6570\u6808\uff0c\u6267\u884c\u52a0\u6cd5\u540e\u5f39\u51fa\u7ed3\u679c\uff09\u3002<\/li>\n\n\n\n<li><strong>\u8fd4\u56de\u5730\u5740<\/strong>\uff1a\u65b9\u6cd5\u6267\u884c\u5b8c\u540e\u56de\u5230\u8c03\u7528\u8005\u7684\u54ea\u4e2a\u4f4d\u7f6e\uff08\u5982<code>methodB<\/code>\u6267\u884c\u5b8c\u56de\u5230<code>methodA<\/code>\u7684\u8c03\u7528\u5904\uff09\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>Java \u6808\u7684\u5173\u952e\u7279\u6027<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u7ebf\u7a0b\u79c1\u6709<\/strong>\uff1a\u6bcf\u4e2a\u7ebf\u7a0b\u6709\u72ec\u7acb\u7684 Java \u6808\uff0c<code>main<\/code>\u7ebf\u7a0b\u7684\u6808\u548c\u5176\u4ed6\u7ebf\u7a0b\u7684\u6808\u4e92\u4e0d\u5e72\u6270\u3002<\/li>\n\n\n\n<li><strong>\u81ea\u52a8\u7ba1\u7406<\/strong>\uff1a\u6808\u5e27\u7684\u5165\u6808 \/ \u51fa\u6808\u7531 JVM \u81ea\u52a8\u5b8c\u6210\uff0c\u65e0\u9700\u624b\u52a8\u64cd\u4f5c\u3002<\/li>\n\n\n\n<li><strong>\u5185\u5b58\u6ea2\u51fa\u98ce\u9669<\/strong>\uff1a\u5982\u679c\u65b9\u6cd5\u8c03\u7528\u94fe\u8fc7\u6df1\uff08\u5982\u9012\u5f52\u8c03\u7528\u65e0\u7ec8\u6b62\u6761\u4ef6\uff09\uff0c\u4f1a\u5bfc\u81f4\u6808\u5e27\u8fc7\u591a\uff0c\u89e6\u53d1<code>StackOverflowError<\/code>\uff08\u6808\u6ea2\u51fa\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\u5728 Java \u4e2d\uff0c<strong>\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u4f1a\u6709\u4e00\u4e2a\u72ec\u7acb\u7684 Java \u6808<\/strong>\u3002\u8fd9\u662f Java \u5185\u5b58\u6a21\u578b\u7684\u91cd\u8981\u7279\u6027\uff0c\u4e3b\u8981\u57fa\u4e8e\u4ee5\u4e0b\u51e0\u4e2a\u539f\u56e0\uff1a<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u4fdd\u8bc1\u7ebf\u7a0b\u6267\u884c\u7684\u72ec\u7acb\u6027<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u65b9\u6cd5\u8c03\u7528\u4e0e\u5c40\u90e8\u53d8\u91cf\u9694\u79bb<\/strong>\uff1aJava \u6808\u7528\u4e8e\u5b58\u50a8\u7ebf\u7a0b\u6267\u884c\u65f6\u7684\u65b9\u6cd5\u8c03\u7528\u6808\u5e27\u3002\u6bcf\u4e2a\u7ebf\u7a0b\u5728\u6267\u884c\u65b9\u6cd5\u65f6\uff0c\u90fd\u4f1a\u521b\u5efa\u76f8\u5e94\u7684\u6808\u5e27\uff0c\u5e76\u5c06\u5176\u538b\u5165\u81ea\u5df1\u7684 Java \u6808\u4e2d\u3002\u4f8b\u5982\uff0c\u7ebf\u7a0b A \u8c03\u7528\u65b9\u6cd5<code>methodA<\/code>\uff0c\u4f1a\u5728\u81ea\u5df1\u7684 Java \u6808\u4e2d\u521b\u5efa<code>methodA<\/code>\u7684\u6808\u5e27\uff1b\u7ebf\u7a0b B \u8c03\u7528<code>methodA<\/code>\u65f6\uff0c\u4e5f\u4f1a\u5728\u81ea\u5df1\u7684 Java \u6808\u4e2d\u521b\u5efa\u72ec\u7acb\u7684<code>methodA<\/code>\u6808\u5e27\u3002\u6bcf\u4e2a\u6808\u5e27\u4e2d\u5b58\u50a8\u4e86\u65b9\u6cd5\u7684\u5c40\u90e8\u53d8\u91cf\u3001\u64cd\u4f5c\u6570\u6808\u4ee5\u53ca\u65b9\u6cd5\u8fd4\u56de\u5730\u5740\u7b49\u4fe1\u606f\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a<code>Calculator<\/code>\u7c7b\uff0c\u5305\u542b\u4e00\u4e2a<code>add<\/code>\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class Calculator {\n    public int add(int a, int b) {\n        int result = a + b;\n        return result;\n    }\n}<\/pre>\n\n\n\n<p>\u5f53\u7ebf\u7a0b A \u548c\u7ebf\u7a0b B \u540c\u65f6\u8c03\u7528<code>add<\/code>\u65b9\u6cd5\u65f6\uff0c\u7ebf\u7a0b A \u4f1a\u5728\u81ea\u5df1\u7684 Java \u6808\u4e2d\u521b\u5efa<code>add<\/code>\u65b9\u6cd5\u7684\u6808\u5e27\uff0c\u5176\u4e2d\u7684\u5c40\u90e8\u53d8\u91cf<code>result<\/code>\u53ea\u5c5e\u4e8e\u7ebf\u7a0b A\uff1b\u7ebf\u7a0b B \u540c\u6837\u5728\u81ea\u5df1\u7684 Java \u6808\u4e2d\u521b\u5efa\u72ec\u7acb\u7684<code>add<\/code>\u65b9\u6cd5\u6808\u5e27\uff0c\u5176\u5c40\u90e8\u53d8\u91cf<code>result<\/code>\u4e5f\u53ea\u5c5e\u4e8e\u7ebf\u7a0b B\uff0c\u4e24\u4e2a\u7ebf\u7a0b\u7684\u6267\u884c\u4e92\u4e0d\u5e72\u6270\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u6267\u884c\u6d41\u7a0b\u9694\u79bb<\/strong>\uff1a\u6bcf\u4e2a\u7ebf\u7a0b\u7684\u65b9\u6cd5\u8c03\u7528\u987a\u5e8f\u548c\u6267\u884c\u72b6\u6001\u662f\u72ec\u7acb\u7684\u3002\u4f8b\u5982\uff0c\u7ebf\u7a0b A \u5728\u6267\u884c\u4e00\u7cfb\u5217\u65b9\u6cd5<code>method1 -&gt; method2 -&gt; method3<\/code>\u65f6\uff0c\u5176 Java \u6808\u4f1a\u6309\u7167\u8fd9\u4e2a\u987a\u5e8f\u4f9d\u6b21\u538b\u5165\u548c\u5f39\u51fa\u6808\u5e27\uff1b\u800c\u7ebf\u7a0b B \u53ef\u80fd\u5728\u6267\u884c<code>method4 -&gt; method5<\/code>\uff0c\u6709\u81ea\u5df1\u72ec\u7acb\u7684\u6808\u5e27\u64cd\u4f5c\u987a\u5e8f\u3002\u8fd9\u4fdd\u8bc1\u4e86\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u80fd\u6309\u7167\u81ea\u5df1\u7684\u903b\u8f91\u987a\u5e8f\u6267\u884c\u65b9\u6cd5\uff0c\u4e0d\u4f1a\u53d7\u5230\u5176\u4ed6\u7ebf\u7a0b\u6267\u884c\u6d41\u7a0b\u7684\u5f71\u54cd\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u652f\u6301\u7ebf\u7a0b\u7684\u5e76\u53d1\u6267\u884c<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u5feb\u901f\u5207\u6362\u4e0e\u6062\u590d<\/strong>\uff1a\u5f53\u64cd\u4f5c\u7cfb\u7edf\u8fdb\u884c\u7ebf\u7a0b\u8c03\u5ea6\u65f6\uff0c\u9700\u8981\u5feb\u901f\u5207\u6362\u7ebf\u7a0b\u7684\u6267\u884c\u4e0a\u4e0b\u6587\u3002\u7531\u4e8e\u6bcf\u4e2a\u7ebf\u7a0b\u6709\u72ec\u7acb\u7684 Java \u6808\uff0c\u4fdd\u5b58\u4e86\u7ebf\u7a0b\u6267\u884c\u7684\u5f53\u524d\u72b6\u6001\uff08\u5982\u5f53\u524d\u65b9\u6cd5\u8c03\u7528\u5230\u54ea\u4e00\u6b65\u3001\u5c40\u90e8\u53d8\u91cf\u7684\u503c\u7b49\uff09\uff0c\u6240\u4ee5\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u4fdd\u5b58\u5f53\u524d\u7ebf\u7a0b\u7684\u72b6\u6001\u5e76\u6062\u590d\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u7684\u72b6\u6001\u3002\u6bd4\u5982\uff0c\u7ebf\u7a0b A \u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u88ab\u6682\u505c\uff0c\u64cd\u4f5c\u7cfb\u7edf\u5c06\u5176 Java \u6808\u4e2d\u7684\u76f8\u5173\u4fe1\u606f\u4fdd\u5b58\u8d77\u6765\uff0c\u7136\u540e\u5207\u6362\u5230\u7ebf\u7a0b B \u6267\u884c\uff0c\u5f53\u518d\u6b21\u5207\u6362\u56de\u7ebf\u7a0b A \u65f6\uff0c\u6839\u636e\u4fdd\u5b58\u7684\u4fe1\u606f\u6062\u590d\u7ebf\u7a0b A \u7684 Java \u6808\u72b6\u6001\uff0c\u7ebf\u7a0b A \u5c31\u53ef\u4ee5\u7ee7\u7eed\u4ece\u6682\u505c\u7684\u5730\u65b9\u6267\u884c\uff0c\u5b9e\u73b0\u7ebf\u7a0b\u7684\u5e76\u53d1\u6267\u884c\u3002<\/li>\n\n\n\n<li><strong>\u907f\u514d\u6570\u636e\u51b2\u7a81<\/strong>\uff1a\u5982\u679c\u591a\u4e2a\u7ebf\u7a0b\u5171\u4eab\u540c\u4e00\u4e2a Java \u6808\uff0c\u90a3\u4e48\u5728\u5e76\u53d1\u6267\u884c\u65f6\uff0c\u5c31\u4f1a\u51fa\u73b0\u5c40\u90e8\u53d8\u91cf\u548c\u65b9\u6cd5\u8c03\u7528\u987a\u5e8f\u6df7\u4e71\u7684\u60c5\u51b5\uff0c\u5bfc\u81f4\u6570\u636e\u51b2\u7a81\u548c\u7a0b\u5e8f\u903b\u8f91\u9519\u8bef\u3002\u800c\u72ec\u7acb\u7684 Java \u6808\u53ef\u4ee5\u786e\u4fdd\u6bcf\u4e2a\u7ebf\u7a0b\u7684\u6267\u884c\u6570\u636e\u548c\u6267\u884c\u6d41\u7a0b\u90fd\u662f\u79c1\u6709\u7684\uff0c\u4ece\u800c\u907f\u514d\u4e86\u8fd9\u4e9b\u95ee\u9898\uff0c\u4f7f\u5f97\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u80fd\u591f\u6b63\u786e\u3001\u7a33\u5b9a\u5730\u8fd0\u884c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>\ud83d\udd39 \u7ebf\u7a0b\u7684\u5e76\u53d1\u6267\u884c\u7684\u4f8b\u5b50<\/strong><\/p>\n\n\n\n<p>\u5728 Java \u4e2d\uff0c<strong>\u5806\uff08Heap\uff09<\/strong>&nbsp;\u548c<strong>\u6808\uff08Stack\uff0c\u8fd9\u91cc\u7279\u6307\u7ebf\u7a0b\u6808\uff09<\/strong>&nbsp;\u662f\u4e24\u79cd\u4e0d\u540c\u7684\u5185\u5b58\u533a\u57df\uff0c\u7528\u9014\u548c\u7279\u6027\u5b8c\u5168\u4e0d\u540c\u3002\u6211\u4eec\u53ef\u4ee5\u7528 \u201c\u4ed3\u5e93\u201d \u548c \u201c\u5de5\u4f5c\u53f0\u201d \u7684\u7c7b\u6bd4\u6765\u7406\u89e3\uff0c\u518d\u7ed3\u5408\u4ee3\u7801\u4f8b\u5b50\u5177\u4f53\u8bf4\u660e\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u5806\uff08Heap\uff09<\/strong>\uff1a<br>\u76f8\u5f53\u4e8e\u4e00\u4e2a\u5927\u578b\u516c\u5171\u4ed3\u5e93\uff0c\u6240\u6709\u5de5\u4eba\uff08\u7ebf\u7a0b\uff09\u90fd\u53ef\u4ee5\u8bbf\u95ee\u3002\u91cc\u9762\u5b58\u653e\u7684\u662f \u201c\u5927\u4ef6\u8d27\u7269\u201d\uff08\u5bf9\u8c61\u5b9e\u4f8b\uff09\uff0c\u6bd4\u5982\u751f\u4ea7\u597d\u7684\u5bb6\u5177\u3001\u7535\u5668\uff0c\u8fd9\u4e9b\u8d27\u7269\u53ef\u4ee5\u88ab\u591a\u4e2a\u5de5\u4eba\u5171\u4eab\u3002\u4ed3\u5e93\u7684\u7a7a\u95f4\u5f88\u5927\uff0c\u4f46\u627e\u4e1c\u897f\uff08\u8bbf\u95ee\u6570\u636e\uff09\u76f8\u5bf9\u6162\u4e00\u70b9\u3002<\/li>\n\n\n\n<li><strong>\u6808\uff08Stack\uff09<\/strong>\uff1a<br>\u6bcf\u4e2a\u5de5\u4eba\uff08\u7ebf\u7a0b\uff09\u90fd\u6709\u81ea\u5df1\u4e13\u5c5e\u7684\u5de5\u4f5c\u53f0\uff0c\u4e92\u4e0d\u5e72\u6270\u3002\u5de5\u4f5c\u53f0\u4e0a\u4e34\u65f6\u5806\u653e\u7684\u662f \u201c\u5f53\u524d\u5904\u7406\u7684\u5de5\u5177\u548c\u6750\u6599\u201d\uff08\u5c40\u90e8\u53d8\u91cf\u3001\u65b9\u6cd5\u8c03\u7528\u4fe1\u606f\uff09\uff0c\u6bd4\u5982\u5de5\u4eba\u6b63\u5728\u7528\u7684\u87ba\u4e1d\u5200\u3001\u5f85\u7ec4\u88c5\u7684\u96f6\u4ef6\u3002\u5de5\u4f5c\u53f0\u7a7a\u95f4\u5c0f\u4f46\u5b58\u53d6\u5feb\uff0c\u5de5\u4eba\u79bb\u5f00\uff08\u7ebf\u7a0b\u7ed3\u675f\uff09\u540e\uff0c\u5de5\u4f5c\u53f0\u4f1a\u88ab\u6e05\u7406\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class Book {\n    String name;\n    int borrowCount;\n\n    public Book(String name) {\n        this.name = name;\n        this.borrowCount = 0;\n    }\n}\n\nclass StudentThread extends Thread {\n    private String studentName;\n    private Book book;  \/\/ \u63a5\u6536\u5916\u90e8\u4f20\u5165\u7684\u5171\u4eab\u5bf9\u8c61\n\n    \/\/ \u6784\u9020\u65b9\u6cd5\u63a5\u6536\u5171\u4eab\u7684Book\u5bf9\u8c61\n    public StudentThread(String name, Book book) {\n        this.studentName = name;\n        this.book = book;  \/\/ \u591a\u4e2a\u7ebf\u7a0b\u4f20\u5165\u540c\u4e00\u4e2aBook\u5b9e\u4f8b\n    }\n\n    public void borrowBook() {\n        int currentCount = book.borrowCount;\n        book.borrowCount = currentCount + 1;\n        System.out.println(studentName + \"\u501f\u9605\u4e86\u300a\" + book.name + \"\u300b\uff0c\u5f53\u524d\u501f\u9605\u6b21\u6570\uff1a\" + book.borrowCount);\n    }\n\n    @Override\n    public void run() {\n        borrowBook();  \/\/ \u64cd\u4f5c\u5171\u4eab\u7684Book\u5bf9\u8c61\n    }\n}\n\npublic class HeapAndStackDemo {\n    public static void main(String[] args) {\n        \/\/ 1. \u5728\u5916\u90e8\u521b\u5efa\u4e00\u4e2a\u5171\u4eab\u7684Book\u5bf9\u8c61\uff08\u5b58\u4e8e\u5806\u4e2d\uff09\n        Book sharedBook = new Book(\"Java\u7f16\u7a0b\u601d\u60f3\");\n\n        \/\/ 2. \u4e24\u4e2a\u7ebf\u7a0b\u4f20\u5165\u540c\u4e00\u4e2a\u5171\u4eab\u5bf9\u8c61\n        new StudentThread(\"\u5c0f\u660e\", sharedBook).start();\n        new StudentThread(\"\u5c0f\u7ea2\", sharedBook).start();\n    }\n}<\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u6ce8\uff1a\u7531\u4e8e\u7ebf\u7a0b\u8c03\u5ea6\u987a\u5e8f\u53ef\u80fd\u4e0d\u540c\uff0c\u7ed3\u679c\u4e5f\u53ef\u80fd\u662f\u5c0f\u7ea2\u5148\u6267\u884c\uff0c\u4f46\u6700\u7ec8borrowCount\u4f1a\u7d2f\u8ba1\u5230 2\uff0c\u4f53\u73b0\u5171\u4eab\u6027\u3002\n\u5c0f\u660e\u501f\u9605\u4e86\u300aJava\u7f16\u7a0b\u601d\u60f3\u300b\uff0c\u5f53\u524d\u501f\u9605\u6b21\u6570\uff1a1\n\u5c0f\u7ea2\u501f\u9605\u4e86\u300aJava\u7f16\u7a0b\u601d\u60f3\u300b\uff0c\u5f53\u524d\u501f\u9605\u6b21\u6570\uff1a2<\/pre>\n\n\n\n<p>\u5185\u5b58\u793a\u610f\u56fe\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\u5806\uff08\u5171\u4eab\u533a\u57df\uff09\uff1a\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 Book\u5bf9\u8c61                \u2502\n\u2502 name: \"Java\u5165\u95e8\"        \u2502\n\u2502 borrowCount: 2          \u2502  \u2190 \u88ab\u4e24\u4e2a\u7ebf\u7a0b\u5171\u540c\u4fee\u6539\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n       \u2191\n       \u2502\n\u7ebf\u7a0bA\uff08\u5c0f\u660e\uff09\u7684\u6808\uff1a        \u7ebf\u7a0bB\uff08\u5c0f\u7ea2\uff09\u7684\u6808\uff1a\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510      \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 studentName: \"\u5c0f\u660e\"    \u2502  studentName: \"\u5c0f\u7ea2\"    \u2502\n\u2502 book: \u5806\u4e2d\u5bf9\u8c61\u5730\u5740     \u2502  book: \u5806\u4e2d\u5bf9\u8c61\u5730\u5740     \u2502\n\u2502 borrow()\u8c03\u7528\u4fe1\u606f       \u2502  borrow()\u8c03\u7528\u4fe1\u606f       \u2502\n\u2502 current: 0\uff08\u4e34\u65f6\u503c\uff09   \u2502  current: 1\uff08\u4e34\u65f6\u503c\uff09   \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518      \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/pre>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>4. \u7a0b\u5e8f\u8ba1\u6570\u5668\uff08Program Counter<\/strong>\uff09\ud83d\udd16<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u2b50 \u7a0b\u5e8f\u8ba1\u6570\u5668\uff08Program Counter Register\uff09\u662f Java \u865a\u62df\u673a\uff08JVM\uff09\u8fd0\u884c\u65f6\u6570\u636e\u533a\u4e2d\u4e00\u5757\u8f83\u5c0f\u7684\u5185\u5b58\u533a\u57df\uff0c\u5c5e\u4e8e\u7ebf\u7a0b\u79c1\u6709\u3002\u5b83\u5728 Java \u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u4e2d\u626e\u6f14\u7740\u81f3\u5173\u91cd\u8981\u7684\u89d2\u8272\uff0c\u4e0b\u9762\u5c06\u4ece\u5176\u4f5c\u7528\u3001\u5de5\u4f5c\u539f\u7406\u3001\u4e0e\u5176\u4ed6\u7ec4\u4ef6\u7684\u4ea4\u4e92\u4ee5\u53ca\u7279\u6b8a\u60c5\u51b5\u7b49\u65b9\u9762\u8be6\u7ec6\u4ecb\u7ecd\uff1a<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u4f5c\u7528<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u8bb0\u5f55\u6267\u884c\u4f4d\u7f6e<\/strong>\uff1a\u7a0b\u5e8f\u8ba1\u6570\u5668\u7528\u4e8e\u8bb0\u5f55\u5f53\u524d\u7ebf\u7a0b\u6240\u6267\u884c\u7684\u5b57\u8282\u7801\u6307\u4ee4\u7684\u5730\u5740\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u5b83\u5c31\u50cf\u662f\u4e00\u4e2a \u201c\u6307\u9488\u201d\uff0c\u6307\u5411\u4e86 Java \u65b9\u6cd5\u5b57\u8282\u7801\u6d41\u4e2d\u7684\u4e0b\u4e00\u6761\u9700\u8981\u6267\u884c\u7684\u6307\u4ee4\u3002\u5728 Java \u7a0b\u5e8f\u8fd0\u884c\u65f6\uff0c\u6267\u884c\u5f15\u64ce\u4f1a\u6839\u636e\u7a0b\u5e8f\u8ba1\u6570\u5668\u7684\u503c\u6765\u83b7\u53d6\u4e0b\u4e00\u6761\u8981\u6267\u884c\u7684\u5b57\u8282\u7801\u6307\u4ee4\uff0c\u4ece\u800c\u4fdd\u8bc1\u7a0b\u5e8f\u80fd\u591f\u6309\u7167\u65e2\u5b9a\u7684\u987a\u5e8f\u4f9d\u6b21\u6267\u884c\u4ee3\u7801\u3002<\/li>\n\n\n\n<li><strong>\u652f\u6301\u7ebf\u7a0b\u5207\u6362\u548c\u6062\u590d<\/strong>\uff1a\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\uff0cCPU \u9700\u8981\u5728\u591a\u4e2a\u7ebf\u7a0b\u4e4b\u95f4\u8fdb\u884c\u5feb\u901f\u5207\u6362\u4ee5\u5b9e\u73b0\u5e76\u53d1\u6267\u884c\u3002\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u7684\u6267\u884c\u88ab\u6682\u505c\u65f6\uff08\u4f8b\u5982\u56e0\u4e3a\u65f6\u95f4\u7247\u7528\u5b8c\u6216\u8005\u7b49\u5f85\u67d0\u4e2a\u8d44\u6e90\uff09\uff0cJVM \u4f1a\u4fdd\u5b58\u8be5\u7ebf\u7a0b\u7684\u7a0b\u5e8f\u8ba1\u6570\u5668\u7684\u503c\u3002\u5f53\u8be5\u7ebf\u7a0b\u518d\u6b21\u88ab\u8c03\u5ea6\u6267\u884c\u65f6\uff0cJVM \u4f1a\u6062\u590d\u7a0b\u5e8f\u8ba1\u6570\u5668\u7684\u503c\uff0c\u4f7f\u7ebf\u7a0b\u80fd\u591f\u4ece\u6682\u505c\u7684\u4f4d\u7f6e\u7ee7\u7eed\u6267\u884c\uff0c\u786e\u4fdd\u7ebf\u7a0b\u6267\u884c\u7684\u8fde\u7eed\u6027\u548c\u6b63\u786e\u6027\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u5de5\u4f5c\u539f\u7406<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u5b57\u8282\u7801\u6267\u884c\u5bfc\u822a<\/strong>\uff1aJava \u6e90\u6587\u4ef6\u7ecf\u8fc7\u7f16\u8bd1\u540e\u4f1a\u751f\u6210\u5b57\u8282\u7801\u6587\u4ef6\uff0c\u5b57\u8282\u7801\u6587\u4ef6\u4e2d\u7684\u6307\u4ee4\u662f\u6309\u7167\u4e00\u5b9a\u987a\u5e8f\u6392\u5217\u7684\u3002\u5f53\u4e00\u4e2a Java \u65b9\u6cd5\u88ab\u6267\u884c\u65f6\uff0c\u7a0b\u5e8f\u8ba1\u6570\u5668\u4f1a\u88ab\u521d\u59cb\u5316\u4e3a\u8be5\u65b9\u6cd5\u5b57\u8282\u7801\u7684\u7b2c\u4e00\u6761\u6307\u4ee4\u7684\u5730\u5740\u3002\u7136\u540e\uff0c\u5728\u65b9\u6cd5\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u6bcf\u6267\u884c\u5b8c\u4e00\u6761\u5b57\u8282\u7801\u6307\u4ee4\uff0c\u7a0b\u5e8f\u8ba1\u6570\u5668\u7684\u503c\u5c31\u4f1a\u81ea\u52a8\u9012\u589e\uff0c\u6307\u5411\u4e0b\u4e00\u6761\u5f85\u6267\u884c\u7684\u5b57\u8282\u7801\u6307\u4ee4\u3002<\/li>\n<\/ul>\n\n\n\n<ul>\n<li><strong>\u591a\u7ebf\u7a0b\u573a\u666f\u4e0b\u7684\u53d8\u5316<\/strong>\uff1a\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u6709\u81ea\u5df1\u72ec\u7acb\u7684\u7a0b\u5e8f\u8ba1\u6570\u5668\uff0c\u8fd9\u662f\u56e0\u4e3a\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u6709\u72ec\u7acb\u7684\u6267\u884c\u8def\u5f84\u548c\u6267\u884c\u72b6\u6001\u3002\u5f53\u7ebf\u7a0b A \u5728\u6267\u884c\u67d0\u4e2a\u65b9\u6cd5\u65f6\uff0c\u7ebf\u7a0b B \u53ef\u80fd\u5728\u6267\u884c\u53e6\u4e00\u4e2a\u65b9\u6cd5\uff0c\u5b83\u4eec\u5404\u81ea\u7684\u7a0b\u5e8f\u8ba1\u6570\u5668\u5206\u522b\u8bb0\u5f55\u7740\u81ea\u5df1\u65b9\u6cd5\u7684\u6267\u884c\u8fdb\u5ea6\u3002\u5f53\u7ebf\u7a0b A \u88ab\u6682\u505c\uff0c\u7ebf\u7a0b B \u5f00\u59cb\u6267\u884c\u65f6\uff0c\u7ebf\u7a0b A \u7684\u7a0b\u5e8f\u8ba1\u6570\u5668\u4f1a\u88ab\u4fdd\u5b58\u8d77\u6765\uff0c\u7ebf\u7a0b B \u7684\u7a0b\u5e8f\u8ba1\u6570\u5668\u5f00\u59cb\u53d1\u6325\u4f5c\u7528\uff0c\u8bb0\u5f55\u7ebf\u7a0b B \u7684\u6267\u884c\u4f4d\u7f6e\uff1b\u5f53\u7ebf\u7a0b A \u518d\u6b21\u88ab\u8c03\u5ea6\u6267\u884c\u65f6\uff0c\u4f1a\u6062\u590d\u4e4b\u524d\u4fdd\u5b58\u7684\u7a0b\u5e8f\u8ba1\u6570\u5668\u7684\u503c\uff0c\u7ee7\u7eed\u4ece\u6682\u505c\u7684\u5730\u65b9\u6267\u884c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u4e0e\u5176\u4ed6 JVM \u7ec4\u4ef6\u7684\u4ea4\u4e92<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u4e0e Java \u6808\u7684\u534f\u4f5c<\/strong>\uff1a\u7a0b\u5e8f\u8ba1\u6570\u5668\u4e0e Java \u6808\u7d27\u5bc6\u914d\u5408\uff0c\u5171\u540c\u5b8c\u6210\u65b9\u6cd5\u7684\u6267\u884c\u3002\u5728\u65b9\u6cd5\u8c03\u7528\u65f6\uff0c\u4f1a\u5728 Java \u6808\u4e2d\u521b\u5efa\u76f8\u5e94\u7684\u6808\u5e27\uff0c\u6808\u5e27\u4e2d\u5305\u542b\u4e86\u65b9\u6cd5\u7684\u5c40\u90e8\u53d8\u91cf\u3001\u64cd\u4f5c\u6570\u6808\u7b49\u4fe1\u606f\u3002\u7a0b\u5e8f\u8ba1\u6570\u5668\u8bb0\u5f55\u7740\u5f53\u524d\u6267\u884c\u7684\u5b57\u8282\u7801\u6307\u4ee4\uff0c\u8fd9\u4e9b\u6307\u4ee4\u4f1a\u64cd\u4f5c\u6808\u5e27\u4e2d\u7684\u5c40\u90e8\u53d8\u91cf\u548c\u64cd\u4f5c\u6570\u6808\u3002\u4f8b\u5982\uff0c\u5b57\u8282\u7801\u6307\u4ee4\u53ef\u80fd\u4f1a\u4ece\u5c40\u90e8\u53d8\u91cf\u8868\u4e2d\u52a0\u8f7d\u53d8\u91cf\u5230\u64cd\u4f5c\u6570\u6808\uff0c\u6216\u8005\u5c06\u64cd\u4f5c\u6570\u6808\u4e2d\u7684\u7ed3\u679c\u5b58\u50a8\u5230\u5c40\u90e8\u53d8\u91cf\u8868\u4e2d\uff0c\u800c\u7a0b\u5e8f\u8ba1\u6570\u5668\u5219\u8d1f\u8d23\u6307\u793a\u8fd9\u4e9b\u64cd\u4f5c\u7684\u6267\u884c\u987a\u5e8f\u3002<\/li>\n\n\n\n<li><strong>\u4e0e\u6267\u884c\u5f15\u64ce\u7684\u4ea4\u4e92<\/strong>\uff1a\u6267\u884c\u5f15\u64ce\u662f JVM \u4e2d\u8d1f\u8d23\u6267\u884c\u5b57\u8282\u7801\u6307\u4ee4\u7684\u7ec4\u4ef6\uff0c\u5b83\u4f1a\u6839\u636e\u7a0b\u5e8f\u8ba1\u6570\u5668\u7684\u503c\u4ece\u5b57\u8282\u7801\u6587\u4ef6\u4e2d\u83b7\u53d6\u4e0b\u4e00\u6761\u8981\u6267\u884c\u7684\u6307\u4ee4\uff0c\u5e76\u5bf9\u6307\u4ee4\u8fdb\u884c\u89e3\u91ca\u6267\u884c\u6216\u5373\u65f6\u7f16\u8bd1\uff08JIT\uff09\u540e\u6267\u884c\u3002\u53ef\u4ee5\u8bf4\uff0c\u7a0b\u5e8f\u8ba1\u6570\u5668\u4e3a\u6267\u884c\u5f15\u64ce\u63d0\u4f9b\u4e86\u6267\u884c\u7684\u65b9\u5411\uff0c\u662f\u6267\u884c\u5f15\u64ce\u6267\u884c\u5b57\u8282\u7801\u6307\u4ee4\u7684 \u201c\u5bfc\u822a\u4eea\u201d\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u7279\u6b8a\u60c5\u51b5<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u672c\u5730\u65b9\u6cd5\u6267\u884c\u65f6<\/strong>\uff1a\u5982\u679c\u7ebf\u7a0b\u6b63\u5728\u6267\u884c\u7684\u662f\u672c\u5730\u65b9\u6cd5\uff08\u5373\u4f7f\u7528<code>native<\/code>\u5173\u952e\u5b57\u4fee\u9970\u7684\u65b9\u6cd5\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u7684\u5b9e\u73b0\u662f\u7531\u975e Java \u8bed\u8a00\uff0c\u5982 C \u6216 C++ \u7f16\u5199\u7684\uff09\uff0c\u90a3\u4e48\u7a0b\u5e8f\u8ba1\u6570\u5668\u7684\u503c\u4e3a\u672a\u5b9a\u4e49\uff08<code>undefined<\/code>\uff09\u3002\u8fd9\u662f\u56e0\u4e3a\u672c\u5730\u65b9\u6cd5\u4e0d\u4ea7\u751f\u5b57\u8282\u7801\uff0c\u4e0d\u5b58\u5728\u5b57\u8282\u7801\u6307\u4ee4\u5e8f\u5217\uff0c\u6240\u4ee5\u7a0b\u5e8f\u8ba1\u6570\u5668\u65e0\u6cd5\u8bb0\u5f55\u5176\u6267\u884c\u4f4d\u7f6e\u3002<\/li>\n\n\n\n<li><strong>\u5f02\u5e38\u5904\u7406\u4e2d\u7684\u4f5c\u7528<\/strong>\uff1a\u5f53 Java \u7a0b\u5e8f\u53d1\u751f\u5f02\u5e38\u65f6\uff0cJVM \u4f1a\u6839\u636e\u5f02\u5e38\u7c7b\u578b\u548c\u5f02\u5e38\u5904\u7406\u673a\u5236\u8fdb\u884c\u76f8\u5e94\u7684\u5904\u7406\u3002\u5728\u5f02\u5e38\u5904\u7406\u8fc7\u7a0b\u4e2d\uff0c\u7a0b\u5e8f\u8ba1\u6570\u5668\u7684\u503c\u53ef\u80fd\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u4f8b\u5982\u8df3\u8f6c\u5230\u5f02\u5e38\u5904\u7406\u4ee3\u7801\u7684\u8d77\u59cb\u4f4d\u7f6e\uff0c\u4ee5\u6267\u884c\u76f8\u5e94\u7684\u5f02\u5e38\u5904\u7406\u903b\u8f91\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u7a0b\u5e8f\u8ba1\u6570\u5668\u867d\u7136\u662f JVM \u8fd0\u884c\u65f6\u6570\u636e\u533a\u4e2d\u4e00\u5757\u76f8\u5bf9\u8f83\u5c0f\u7684\u5185\u5b58\u533a\u57df\uff0c\u4f46\u5b83\u5bf9\u4e8e Java \u7a0b\u5e8f\u7684\u6b63\u786e\u6267\u884c\u8d77\u7740\u4e0d\u53ef\u6216\u7f3a\u7684\u4f5c\u7528\u3002\u5b83\u5c31\u50cf\u4e00\u4e2a\u7cbe\u51c6\u7684 \u201c\u6307\u6325\u5b98\u201d\uff0c\u6307\u5f15\u7740\u7a0b\u5e8f\u7684\u6267\u884c\u6d41\u7a0b\uff0c\u786e\u4fdd\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u80fd\u6709\u6761\u4e0d\u7d0a\u5730\u6267\u884c\u4ee3\u7801\uff0c\u5c24\u5176\u662f\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\uff0c\u4fdd\u969c\u4e86\u7ebf\u7a0b\u4e4b\u95f4\u7684\u5e76\u53d1\u6267\u884c\u548c\u5feb\u901f\u5207\u6362\u3002<\/p>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>5. \u672c\u5730\u65b9\u6cd5\u6808\uff08Native Method Stack\uff09<\/strong>\ud83d\udd16<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u2b50 \u672c\u5730\u65b9\u6cd5\u6808\uff08Native Method Stack\uff09\u662f Java \u865a\u62df\u673a\uff08JVM\uff09\u4e3a\u6267\u884c<strong>\u672c\u5730\u65b9\u6cd5\uff08Native Method\uff09<\/strong>&nbsp;\u63d0\u4f9b\u7684\u7ebf\u7a0b\u79c1\u6709\u5185\u5b58\u533a\u57df\uff0c\u529f\u80fd\u4e0e Java \u6808\u7c7b\u4f3c\uff0c\u4f46\u4e13\u95e8\u670d\u52a1\u4e8e\u975e Java \u8bed\u8a00\u5b9e\u73b0\u7684\u65b9\u6cd5\uff08\u5982 C\/C++ \u7f16\u5199\u7684\u4ee3\u7801\uff09\u3002\u6211\u4eec\u901a\u8fc7\u5177\u4f53\u4f8b\u5b50\u548c\u5bf9\u6bd4\uff0c\u8be6\u7ec6\u89e3\u91ca\u5176\u4f5c\u7528\u548c\u5de5\u4f5c\u539f\u7406\uff1a<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u4ec0\u4e48\u662f\u672c\u5730\u65b9\u6cd5\uff1f<\/strong><\/p>\n\n\n\n<p>\u672c\u5730\u65b9\u6cd5\u662f\u7528<code>native<\/code>\u5173\u952e\u5b57\u4fee\u9970\u7684\u65b9\u6cd5\uff0c\u5176\u5b9e\u73b0\u4e0d\u5728 Java \u4ee3\u7801\u4e2d\uff0c\u800c\u662f\u7531 C\/C++ \u7b49\u672c\u5730\u8bed\u8a00\u7f16\u5199\uff0c\u7f16\u8bd1\u4e3a\u673a\u5668\u7801\u540e\u5d4c\u5165 JVM \u6216\u52a8\u6001\u94fe\u63a5\u5e93\u4e2d\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class NativeDemo {\n    \/\/ \u58f0\u660e\u672c\u5730\u65b9\u6cd5\uff08\u65e0Java\u5b9e\u73b0\uff09\n    public native void callNativeMethod();\n\n    static {\n        \/\/ \u52a0\u8f7d\u5305\u542b\u672c\u5730\u65b9\u6cd5\u5b9e\u73b0\u7684\u52a8\u6001\u94fe\u63a5\u5e93\uff08\u5982Windows\u7684.dll\u3001Linux\u7684.so\uff09\n        System.loadLibrary(\"NativeImpl\");\n    }\n\n    public static void main(String[] args) {\n        new NativeDemo().callNativeMethod();\n    }\n}<\/pre>\n\n\n\n<ul>\n<li><code>callNativeMethod()<\/code>\u662f\u672c\u5730\u65b9\u6cd5\uff0cJava \u4ee3\u7801\u53ea\u58f0\u660e\u4e86\u5b83\u7684\u5b58\u5728\uff0c\u5177\u4f53\u5b9e\u73b0\u7531<code>NativeImpl<\/code>\u5e93\u4e2d\u7684 C \u4ee3\u7801\u5b8c\u6210\u3002<\/li>\n\n\n\n<li>\u5f53 Java \u7ebf\u7a0b\u8c03\u7528\u8fd9\u4e2a\u65b9\u6cd5\u65f6\uff0cJVM \u4f1a\u5207\u6362\u5230\u672c\u5730\u65b9\u6cd5\u6808\u6267\u884c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u672c\u5730\u65b9\u6cd5\u6808\u7684\u5de5\u4f5c\u6d41\u7a0b\uff08\u7ed3\u5408\u4f8b\u5b50\uff09<\/strong><\/p>\n\n\n\n<p>\u5047\u8bbe<code>callNativeMethod()<\/code>\u7684 C \u8bed\u8a00\u5b9e\u73b0\u5982\u4e0b\uff08\u7b80\u5316\u7248\uff09\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ NativeImpl.c\n#include &lt;jni.h>\n#include &lt;stdio.h>\n\n\/\/ JNI\u89c4\u8303\u8981\u6c42\u7684\u65b9\u6cd5\u540d\u683c\u5f0f\uff1aJava_\u7c7b\u540d_\u65b9\u6cd5\u540d\nJNIEXPORT void JNICALL Java_NativeDemo_callNativeMethod(JNIEnv *env, jobject obj) {\n    printf(\"\u6267\u884cC\u8bed\u8a00\u5b9e\u73b0\u7684\u672c\u5730\u65b9\u6cd5\\n\");\n    localCFunction(); \/\/ \u8c03\u7528\u53e6\u4e00\u4e2a\u672c\u5730\u51fd\u6570\n}\n\n\/\/ \u672c\u5730\u51fd\u6570\uff08\u4ec5C\u8bed\u8a00\u5185\u90e8\u8c03\u7528\uff09\nvoid localCFunction() {\n    printf(\"\u6267\u884c\u672c\u5730\u8f85\u52a9\u51fd\u6570\\n\");\n}<\/pre>\n\n\n\n<p>\u5f53 Java \u7ebf\u7a0b\u6267\u884c<code>callNativeMethod()<\/code>\u65f6\uff0c\u672c\u5730\u65b9\u6cd5\u6808\u7684\u53d8\u5316\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p>\u25fe1. \u8c03\u7528\u672c\u5730\u65b9\u6cd5\u524d\uff1aJava \u6808\u6b63\u5e38\u5de5\u4f5c<\/p>\n\n\n\n<ul>\n<li><code>main<\/code>\u65b9\u6cd5\u5728 Java \u6808\u4e2d\u6267\u884c\uff0c\u8c03\u7528<code>callNativeMethod()<\/code>\u524d\uff0cJava \u6808\u72b6\u6001\uff1a<\/li>\n\n\n\n<li>\u672c\u5730\u65b9\u6cd5\u6808\u6b64\u65f6\u4e3a\u7a7a\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Java\u6808\uff08\u7ebf\u7a0b\u79c1\u6709\uff09\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 main\u6808\u5e27        \u2502  \u2190 \u6808\u9876\uff1a\u6267\u884c\u5230\u8c03\u7528callNativeMethod()\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n\n<\/pre>\n\n\n\n<p>\u25fe2. \u8fdb\u5165\u672c\u5730\u65b9\u6cd5\uff1a\u672c\u5730\u65b9\u6cd5\u6808\u538b\u6808<\/p>\n\n\n\n<ul>\n<li>JVM \u68c0\u6d4b\u5230<code>callNativeMethod()<\/code>\u662f\u672c\u5730\u65b9\u6cd5\uff0c\u6682\u505c Java \u6808\u6267\u884c\uff0c\u5207\u6362\u5230\u672c\u5730\u65b9\u6cd5\u6808\uff1a\n<ul>\n<li>\u521b\u5efa **<code>Java_NativeDemo_callNativeMethod<\/code>\u6808\u5e27 **\uff0c\u538b\u5165\u672c\u5730\u65b9\u6cd5\u6808\uff08\u8bb0\u5f55 C \u65b9\u6cd5\u7684\u53c2\u6570\u3001\u5c40\u90e8\u53d8\u91cf\u3001\u8fd4\u56de\u5730\u5740\uff09\u3002<\/li>\n\n\n\n<li>\u53c2\u6570<code>JNIEnv *env<\/code>\u548c<code>jobject obj<\/code>\u7531 JVM \u81ea\u52a8\u4f20\u9012\uff08\u7528\u4e8e C \u4ee3\u7801\u4e0e JVM \u4ea4\u4e92\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\u672c\u5730\u65b9\u6cd5\u6808\uff08\u7ebf\u7a0b\u79c1\u6709\uff09\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 Java_NativeDemo_callNativeMethod\u6808\u5e27  \u2190 \u6808\u9876\uff1a\u6267\u884cC\u65b9\u6cd5\n\u2502 - \u53c2\u6570\uff1aenv, obj\n\u2502 - \u5c40\u90e8\u53d8\u91cf\uff1a\uff08C\u51fd\u6570\u7684\u5c40\u90e8\u53d8\u91cf\uff09\n\u2502 - \u8fd4\u56de\u5730\u5740\uff1aJava\u6808\u4e2dmain\u65b9\u6cd5\u7684\u8c03\u7528\u5904\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n\nJava\u6808\uff08\u6682\u505c\uff09\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 main\u6808\u5e27        \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n<\/pre>\n\n\n\n<p>\u25fe3. \u672c\u5730\u65b9\u6cd5\u8c03\u7528\u672c\u5730\u51fd\u6570\uff1a\u6808\u5e27\u7ee7\u7eed\u538b\u5165<\/p>\n\n\n\n<ul>\n<li>C \u65b9\u6cd5\u4e2d\u8c03\u7528<code>localCFunction()<\/code>\uff08\u7eaf C \u51fd\u6570\uff09\uff0c\u672c\u5730\u65b9\u6cd5\u6808\u7ee7\u7eed\u538b\u5165\u65b0\u6808\u5e27\uff1a<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\u672c\u5730\u65b9\u6cd5\u6808\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 localCFunction\u6808\u5e27  \u2190 \u6808\u9876\uff1a\u6267\u884c\u8f85\u52a9C\u51fd\u6570\n\u2502 - \u5c40\u90e8\u53d8\u91cf\uff1a\uff08C\u51fd\u6570\u7684\u5c40\u90e8\u53d8\u91cf\uff09\n\u2502 - \u8fd4\u56de\u5730\u5740\uff1aJava_NativeDemo_callNativeMethod\u7684\u8c03\u7528\u5904\n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524\n\u2502 Java_NativeDemo_callNativeMethod\u6808\u5e27  \u2190 \u6682\u505c\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/pre>\n\n\n\n<p>\u25fe4. \u672c\u5730\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\uff1a\u6808\u5e27\u51fa\u6808<\/p>\n\n\n\n<ul>\n<li><code>localCFunction()<\/code>\u6267\u884c\u5b8c\u6bd5\uff0c\u5176\u6808\u5e27\u4ece\u672c\u5730\u65b9\u6cd5\u6808\u5f39\u51fa\uff0c\u56de\u5230<code>Java_NativeDemo_callNativeMethod<\/code>\u7ee7\u7eed\u6267\u884c\uff1a<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\u672c\u5730\u65b9\u6cd5\u6808\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 Java_NativeDemo_callNativeMethod\u6808\u5e27  \u2190 \u6808\u9876\uff1a\u6062\u590d\u6267\u884c\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/pre>\n\n\n\n<p>\u25fe5. \u672c\u5730\u65b9\u6cd5\u6267\u884c\u5b8c\u6bd5\uff1a\u672c\u5730\u65b9\u6cd5\u6808\u6e05\u7a7a<\/p>\n\n\n\n<ul>\n<li><code>Java_NativeDemo_callNativeMethod<\/code>\u6267\u884c\u5b8c\u6bd5\uff0c\u5176\u6808\u5e27\u5f39\u51fa\uff0c\u672c\u5730\u65b9\u6cd5\u6808\u4e3a\u7a7a\uff1a\n<ul>\n<li>JVM \u5207\u6362\u56de Java \u6808\uff0c<code>main<\/code>\u65b9\u6cd5\u4ece\u8c03\u7528\u5904\u7ee7\u7eed\u6267\u884c\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\u672c\u5730\u65b9\u6cd5\u6808\uff08\u7a7a\uff09\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502                 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n\nJava\u6808\uff08\u6062\u590d\u6267\u884c\uff09\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 main\u6808\u5e27        \u2502  \u2190 \u6808\u9876\uff1a\u7ee7\u7eed\u6267\u884c\u540e\u7eed\u4ee3\u7801\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/pre>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u672c\u5730\u65b9\u6cd5\u6808\u4e0e Java \u6808\u7684\u5bf9\u6bd4<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>\u5bf9\u6bd4\u7ef4\u5ea6<\/th><th>\u672c\u5730\u65b9\u6cd5\u6808\uff08Native Method Stack\uff09<\/th><th>Java \u6808\uff08Java Stack\uff09<\/th><\/tr><\/thead><tbody><tr><td>\u670d\u52a1\u5bf9\u8c61<\/td><td>\u672c\u5730\u65b9\u6cd5\uff08C\/C++ \u7b49\u5b9e\u73b0\uff09<\/td><td>Java \u65b9\u6cd5\uff08\u5b57\u8282\u7801\u5b9e\u73b0\uff09<\/td><\/tr><tr><td>\u6808\u5e27\u5185\u5bb9<\/td><td>\u5b58\u50a8 C \u51fd\u6570\u7684\u53c2\u6570\u3001\u5c40\u90e8\u53d8\u91cf\u3001\u8fd4\u56de\u5730\u5740<\/td><td>\u5b58\u50a8 Java \u65b9\u6cd5\u7684\u5c40\u90e8\u53d8\u91cf\u3001\u64cd\u4f5c\u6570\u6808\u7b49<\/td><\/tr><tr><td>\u6307\u4ee4\u96c6<\/td><td>\u6267\u884c\u672c\u5730\u673a\u5668\u7801\uff08\u4e0e CPU \u67b6\u6784\u76f8\u5173\uff09<\/td><td>\u6267\u884c Java \u5b57\u8282\u7801\uff08\u8de8\u5e73\u53f0\uff09<\/td><\/tr><tr><td>\u7a0b\u5e8f\u8ba1\u6570\u5668<\/td><td>\u6267\u884c\u672c\u5730\u65b9\u6cd5\u65f6\uff0cJVM \u7a0b\u5e8f\u8ba1\u6570\u5668\u503c\u4e3a<code>undefined<\/code>\uff08\u65e0\u5b57\u8282\u7801\u5730\u5740\uff09<\/td><td>\u8bb0\u5f55 Java \u5b57\u8282\u7801\u6307\u4ee4\u5730\u5740<\/td><\/tr><tr><td>\u6ea2\u51fa\u5f02\u5e38<\/td><td>\u53ef\u80fd\u629b\u51fa<code>StackOverflowError<\/code>\uff08\u9012\u5f52\u8fc7\u6df1\uff09<\/td><td>\u540c\u6837\u53ef\u80fd\u629b\u51fa<code>StackOverflowError<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u672c\u5730\u65b9\u6cd5\u6808\u7684\u5b9e\u9645\u5e94\u7528\u573a\u666f<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>JDK \u5e95\u5c42\u529f\u80fd<\/strong>\uff1a\u8bb8\u591a JDK \u6838\u5fc3\u65b9\u6cd5\uff08\u5982<code>System.currentTimeMillis()<\/code>\u3001<code>Thread.sleep()<\/code>\uff09\u7684\u5e95\u5c42\u5b9e\u73b0\u4f9d\u8d56\u672c\u5730\u65b9\u6cd5\uff0c\u6267\u884c\u65f6\u4f1a\u4f7f\u7528\u672c\u5730\u65b9\u6cd5\u6808\u3002<\/li>\n\n\n\n<li><strong>\u8de8\u8bed\u8a00\u8c03\u7528<\/strong>\uff1a\u5f53 Java \u9700\u8981\u8c03\u7528\u64cd\u4f5c\u7cfb\u7edf API\uff08\u5982\u6587\u4ef6\u64cd\u4f5c\u3001\u7f51\u7edc\u901a\u4fe1\uff09\u6216\u786c\u4ef6\u9a71\u52a8\u65f6\uff0c\u901a\u8fc7\u672c\u5730\u65b9\u6cd5\u6808\u8854\u63a5 Java \u4ee3\u7801\u4e0e\u672c\u5730\u4ee3\u7801\u3002<\/li>\n\n\n\n<li><strong>\u6027\u80fd\u654f\u611f\u573a\u666f<\/strong>\uff1a\u5bf9\u6027\u80fd\u8981\u6c42\u6781\u9ad8\u7684\u6a21\u5757\uff08\u5982\u52a0\u5bc6\u7b97\u6cd5\u3001\u56fe\u5f62\u6e32\u67d3\uff09\u53ef\u901a\u8fc7\u672c\u5730\u65b9\u6cd5\u5b9e\u73b0\uff0c\u672c\u5730\u65b9\u6cd5\u6808\u8d1f\u8d23\u7ba1\u7406\u8fd9\u4e9b\u4ee3\u7801\u7684\u6267\u884c\u6d41\u7a0b\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u672c\u5730\u65b9\u6cd5\u6808\u662f JVM \u8fde\u63a5 Java \u4e16\u754c\u4e0e\u672c\u5730\u4ee3\u7801\u7684 \u201c\u6865\u6881\u201d\uff0c\u5176\u5de5\u4f5c\u539f\u7406\u4e0e Java \u6808\u7c7b\u4f3c\uff08\u5148\u8fdb\u540e\u51fa\u3001\u7ebf\u7a0b\u79c1\u6709\uff09\uff0c\u4f46\u4e13\u95e8\u7528\u4e8e\u6267\u884c\u975e Java \u8bed\u8a00\u5b9e\u73b0\u7684\u65b9\u6cd5\u3002\u5b83\u7684\u5b58\u5728\u8ba9 Java \u65e2\u80fd\u4fdd\u6301\u8de8\u5e73\u53f0\u7279\u6027\uff0c\u53c8\u80fd\u7075\u6d3b\u8c03\u7528\u5e95\u5c42\u7cfb\u7edf\u8d44\u6e90\uff0c\u662f JVM \u4f53\u7cfb\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u7ec4\u6210\u90e8\u5206\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>6. \u7c7b\u52a0\u8f7d\u5b50\u7cfb\u7edf\uff08Class Loading Subsystem\uff09<\/strong>\ud83d\udd16<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u2b50 \u7c7b\u52a0\u8f7d\u5b50\u7cfb\u7edf\uff08Class Loading Subsystem\uff09\u662f Java \u865a\u62df\u673a\uff08JVM\uff09\u7684\u6838\u5fc3\u7ec4\u6210\u90e8\u5206\uff0c\u8d1f\u8d23\u5c06\u5b57\u8282\u7801\u6587\u4ef6\uff08.class\uff09\u52a0\u8f7d\u5230\u5185\u5b58\uff0c\u5e76\u5bf9\u5176\u8fdb\u884c\u9a8c\u8bc1\u3001\u51c6\u5907\u3001\u89e3\u6790\u7b49\u5904\u7406\uff0c\u6700\u7ec8\u5f62\u6210\u53ef\u88ab JVM \u76f4\u63a5\u4f7f\u7528\u7684<strong>\u8fd0\u884c\u65f6\u6570\u636e\u7ed3\u6784<\/strong>\u3002\u5b83\u662f\u8fde\u63a5 Java \u6e90\u4ee3\u7801\u7f16\u8bd1\u540e\u5b57\u8282\u7801\u4e0e JVM \u6267\u884c\u5f15\u64ce\u7684\u5173\u952e\u73af\u8282\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u4f5c\u7528<\/strong>\uff1a\u52a0\u8f7d&nbsp;<code>.class<\/code>&nbsp;\u6587\u4ef6\u5230 JVM\uff0c\u89e3\u6790\u6210\u65b9\u6cd5\u533a\u7684\u7c7b\u5143\u6570\u636e\u3002<\/li>\n\n\n\n<li><strong>\u6d41\u7a0b<\/strong>\uff1a\n<ul>\n<li>\u4ece\u6587\u4ef6\u7cfb\u7edf\u3001\u7f51\u7edc\u7b49\u4f4d\u7f6e\u8bfb\u53d6&nbsp;<code>.class<\/code>&nbsp;\u6587\u4ef6\u3002<\/li>\n\n\n\n<li>\u901a\u8fc7 \u201c\u52a0\u8f7d \u2192 \u94fe\u63a5\uff08\u9a8c\u8bc1\u3001\u51c6\u5907\u3001\u89e3\u6790\uff09 \u2192 \u521d\u59cb\u5316\u201d \u8fc7\u7a0b\uff0c\u6700\u7ec8\u5728\u65b9\u6cd5\u533a\u751f\u6210\u7c7b\u7684\u5143\u6570\u636e\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u7c7b\u52a0\u8f7d\u5b50\u7cfb\u7edf\u662f JVM \u5c06\u5b57\u8282\u7801\u8f6c\u6362\u4e3a\u53ef\u6267\u884c\u4ee3\u7801\u7684 \u201c\u7ffb\u8bd1\u5b98\u201d\uff0c\u901a\u8fc7 \u201c\u52a0\u8f7d\u2192\u9a8c\u8bc1\u2192\u51c6\u5907\u2192\u89e3\u6790\u2192\u521d\u59cb\u5316\u201d \u4e94\u4e2a\u9636\u6bb5\u786e\u4fdd\u7c7b\u7684\u5408\u6cd5\u6027\u548c\u6b63\u786e\u6027\uff0c\u800c\u7c7b\u52a0\u8f7d\u5668\uff08\u5c24\u5176\u662f\u53cc\u4eb2\u59d4\u6d3e\u6a21\u578b\uff09\u5219\u662f\u5b9e\u73b0\u8fd9\u4e00\u8fc7\u7a0b\u7684\u6838\u5fc3\u673a\u5236\u3002\u7406\u89e3\u7c7b\u52a0\u8f7d\u5b50\u7cfb\u7edf\uff0c\u6709\u52a9\u4e8e\u6df1\u5165\u638c\u63e1 Java \u7684\u52a8\u6001\u6027\uff08\u5982\u53cd\u5c04\u3001\u52a8\u6001\u4ee3\u7406\uff09\u548c\u6027\u80fd\u4f18\u5316\uff08\u5982\u7c7b\u52a0\u8f7d\u4f18\u5316\uff09\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>7.\u6267\u884c\u5f15\u64ce\uff08Execution Engine\uff09<\/strong>\ud83d\udd16<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u2b50 \u6267\u884c\u5f15\u64ce\uff08Execution Engine\uff09\u662f Java \u865a\u62df\u673a\uff08JVM\uff09\u7684 \u201c\u5fc3\u810f\u201d\uff0c\u8d1f\u8d23\u5c06\u5b57\u8282\u7801\uff08.class \u6587\u4ef6\u4e2d\u7684\u6307\u4ee4\uff09\u8f6c\u6362\u4e3a\u673a\u5668\u7801\u5e76\u6267\u884c\uff0c\u662f\u8fde\u63a5 Java \u4ee3\u7801\u4e0e\u5e95\u5c42\u786c\u4ef6\u7684\u5173\u952e\u7ec4\u4ef6\u3002\u5b83\u7684\u6027\u80fd\u76f4\u63a5\u51b3\u5b9a\u4e86 Java \u7a0b\u5e8f\u7684\u8fd0\u884c\u6548\u7387\uff0c\u4e0b\u9762\u4ece\u6838\u5fc3\u529f\u80fd\u3001\u5de5\u4f5c\u539f\u7406\u3001\u5b9e\u73b0\u65b9\u5f0f\u7b49\u65b9\u9762\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u6267\u884c\u5f15\u64ce\u7684\u6838\u5fc3\u529f\u80fd<\/strong><\/p>\n\n\n\n<p>\u6267\u884c\u5f15\u64ce\u7684\u6838\u5fc3\u4efb\u52a1\u662f<strong>\u6267\u884c\u5b57\u8282\u7801\u6307\u4ee4<\/strong>\uff0c\u5177\u4f53\u5305\u62ec\uff1a<\/p>\n\n\n\n<ol>\n<li>\u4ece\u65b9\u6cd5\u533a\u8bfb\u53d6\u7c7b\u7684\u5b57\u8282\u7801\u6307\u4ee4\uff1b<\/li>\n\n\n\n<li>\u5c06\u5b57\u8282\u7801\u8f6c\u6362\u4e3a CPU \u53ef\u8bc6\u522b\u7684\u673a\u5668\u7801\uff1b<\/li>\n\n\n\n<li>\u63a7\u5236\u6307\u4ee4\u7684\u6267\u884c\u987a\u5e8f\uff08\u5982\u5206\u652f\u3001\u5faa\u73af\u3001\u65b9\u6cd5\u8c03\u7528\uff09\uff1b<\/li>\n\n\n\n<li>\u7ba1\u7406\u64cd\u4f5c\u6570\u6808\u3001\u5c40\u90e8\u53d8\u91cf\u8868\u7b49\u8fd0\u884c\u65f6\u6570\u636e\uff1b<\/li>\n\n\n\n<li>\u5904\u7406\u5f02\u5e38\u3001\u540c\u6b65\uff08synchronized\uff09\u7b49\u7279\u6b8a\u903b\u8f91\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u7b80\u5355\u8bf4\uff0c\u6267\u884c\u5f15\u64ce\u5c31\u50cf \u201c\u7ffb\u8bd1\u517c\u6267\u884c\u8005\u201d\uff1a\u628a Java \u5b57\u8282\u7801\uff08\u8de8\u5e73\u53f0\u7684 \u201c\u4e2d\u95f4\u8bed\u8a00\u201d\uff09\u7ffb\u8bd1\u6210\u673a\u5668\u80fd\u61c2\u7684 \u201c\u65b9\u8a00\u201d\uff08\u673a\u5668\u7801\uff09\uff0c\u5e76\u6309\u987a\u5e8f\u6267\u884c\u3002<\/p>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p>\ud83d\udd39 <strong>\u5b57\u8282\u7801\u4e0e\u6267\u884c\u5f15\u64ce\u7684\u5173\u7cfb<\/strong><\/p>\n\n\n\n<p>Java \u6e90\u4ee3\u7801\u7f16\u8bd1\u540e\u751f\u6210\u5b57\u8282\u7801\uff08\u975e\u673a\u5668\u7801\uff09\uff0c\u5b57\u8282\u7801\u662f\u4e00\u79cd<strong>\u4e0e\u5e73\u53f0\u65e0\u5173\u7684\u6307\u4ee4\u96c6<\/strong>\uff08\u5982<code>iconst_1<\/code>\u8868\u793a\u5c06\u6574\u6570 1 \u538b\u5165\u6808\uff0c<code>iadd<\/code>\u8868\u793a\u6574\u6570\u52a0\u6cd5\uff09\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u7684 Java \u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public static int add(int a, int b) {\n    return a + b;\n}\n\n<\/pre>\n\n\n\n<p>\u7f16\u8bd1\u540e\u7684\u5b57\u8282\u7801\u6307\u4ee4\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">0: iload_0    \/\/ \u52a0\u8f7d\u7b2c\u4e00\u4e2a\u53c2\u6570a\u5230\u64cd\u4f5c\u6570\u6808\n1: iload_1    \/\/ \u52a0\u8f7d\u7b2c\u4e8c\u4e2a\u53c2\u6570b\u5230\u64cd\u4f5c\u6570\u6808\n2: iadd       \/\/ \u5f39\u51fa\u6808\u9876\u4e24\u4e2a\u6574\u6570\u76f8\u52a0\uff0c\u7ed3\u679c\u538b\u6808\n3: ireturn    \/\/ 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HotSpot\u3001OpenJ9\uff09\u7684\u6267\u884c\u5f15\u64ce\u901a\u5e38\u91c7\u7528<strong>\u6df7\u5408\u6267\u884c\u7b56\u7565<\/strong>\uff0c\u4e3b\u8981\u5305\u62ec\u4e09\u79cd\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<p>\u25fe1.\u89e3\u91ca\u6267\u884c\uff08Interpretation\uff09<\/p>\n\n\n\n<ul>\n<li><strong>\u539f\u7406<\/strong>\uff1a\u9010\u6761\u8bfb\u53d6\u5b57\u8282\u7801\u6307\u4ee4\uff0c\u5b9e\u65f6\u7ffb\u8bd1\u6210\u673a\u5668\u7801\u5e76\u6267\u884c\uff08\u201c\u8fb9\u7ffb\u8bd1\u8fb9\u6267\u884c\u201d\uff09\u3002<\/li>\n\n\n\n<li><strong>\u8fc7\u7a0b<\/strong>\uff1a<br>\u6267\u884c\u5f15\u64ce\u5185\u7f6e \u201c\u89e3\u91ca\u5668\u201d\uff0c\u5bf9\u5b57\u8282\u7801\u6307\u4ee4\u9010\u4e2a\u89e3\u6790\uff08\u5982\u9047\u5230<code>iadd<\/code>\u5c31\u8c03\u7528\u5bf9\u5e94\u7684\u52a0\u6cd5\u51fd\u6570\uff09\uff0c\u76f4\u63a5\u64cd\u4f5c Java 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