{"id":8176,"date":"2022-11-01T12:52:29","date_gmt":"2022-11-01T04:52:29","guid":{"rendered":"http:\/\/123.57.164.21\/?p=8176"},"modified":"2022-11-01T12:52:29","modified_gmt":"2022-11-01T04:52:29","slug":"java%e4%b8%adint%e4%b8%ba%e4%bb%80%e4%b9%88%e5%8d%a0%e5%9b%9b%e4%b8%aa%e5%ad%97%e8%8a%82%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=8176","title":{"rendered":"Java\u4e2dint\u4e3a\u4ec0\u4e48\u5360\u56db\u4e2a\u5b57\u8282\uff1f"},"content":{"rendered":"\n<p><strong>\u7b80\u5355\u4e86\u89e3\u8ba1\u7b97\u673a\u4e3a\u4ec0\u4e48\u8981\u91c7\u7528\u4e8c\u8fdb\u5236\u8868\u793a\u4fe1\u606f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u56e0\u4e3a\u8ba1\u7b97\u673a\u4f5c\u4e3a\u4e00\u79cd\u7535\u5b50\u8ba1\u7b97\u673a\u5de5\u5177\uff0c\u662f\u7531\u5927\u91cf\u7684\u7535\u5b50\u5668\u4ef6\u7ec4\u6210\u7684\uff0c\u5728\u8fd9\u4e9b\u7535\u5b50\u5668\u4ef6\u4e2d\uff0c\u7535\u8def\u7684\u901a\u65ad\uff0c\u7535\u4f4d\u7684\u9ad8\u4f4e\uff0c\u7528\u4e24\u4e2a\u6570\u5b57\u7b26\u53f7\u201c1\u201d\u548c\u201c0\u201d\u5206\u522b\u8868\u793a\u5bb9\u6613\u5b9e\u73b0\uff0c\u540c\u65f6\u4e8c\u8fdb\u5236\u7684\u8fd0\u7b97\u6cd5\u5219\u4e5f\u5f88\u7b80\u5355\uff0c\u56e0\u6b64\u8ba1\u7b97\u673a\u5185\u90e8\u901a\u5e38\u91c7\u7528\u4e8c\u8fdb\u5236\u4ee3\u7801\u6765\u4f5c\u4e3a\u5185\u90e8\u5b58\u50a8\uff0c\u4f20\u8f93\u548c\u5904\u7406\u6570\u636e\uff0c\u4e8c\u8fdb\u5236\u6570\u636e\u662f\u75280\u548c1\u4e24\u4e2a\u6570\u7801\u6765\u8868\u793a\u7684\u6570\uff0c\u5b83\u7684\u57fa\u6570\u4e3a2\uff08\u9022\u4e8c\u8fdb\u4e00\uff0c\u501f\u4e00\u5f53\u4e8c\uff09<br>\u5176\u5b9e\u6700\u5f00\u59cb\u4f7f\u7528\u7684\u5e76\u4e0d\u662f\u4e8c\u8fdb\u5236\uff0c\u800c\u662f\u5341\u8fdb\u5236\uff0c\u56e0\u4e3a\u4eba\u4eec\u6709\u5341\u4e2a\u624b\u6307\u5934\uff0c\u624b\u53ef\u4ee5\u8868\u793a\u5341\u4e2a\u6570\u5b57\uff0c\u6240\u4ee5\u5341\u8fdb\u5236\u662f\u6bd4\u8f83\u5408\u7406\u7684\uff0c0\u7684\u6982\u5ff5\u662f\u4e4b\u540e\u5f88\u4e45\u624d\u8bde\u751f\u7684\uff0c\u6240\u4ee5\u662f0-10\u800c\u4e0d\u662f0-9\u3002<br>\u7535\u5b50\u8ba1\u7b97\u673a\u51fa\u73b0\u4ee5\u540e\uff0c\u4f7f\u7528\u7535\u5b50\u7ba1\u6765\u8868\u793a\u5341\u79cd\u72b6\u6001\u8fc7\u4e8e\u590d\u6742\uff0c\u6240\u4ee5\u6240\u6709\u7684\u7535\u5b50\u8ba1\u7b97\u673a\u4e2d\u53ea\u6709\u4e24\u79cd\u57fa\u672c\u7684\u72b6\u6001\uff0c\u5f00\u548c\u5173\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u7535\u5b50\u7ba1\u7684\u4e24\u79cd\u72b6\u6001\u51b3\u5b9a\u4e86\u4ee5\u7535\u5b50\u7ba1\u4e3a\u57fa\u7840\u7684\u7535\u5b50\u8ba1\u7b97\u673a\u91c7\u7528\u4e8c\u8fdb\u5236\u6765\u8868\u793a\u6570\u5b57\u548c\u6570\u636e\u3002\u5e38\u7528\u7684\u8fdb\u5236\u8fd8\u67098\u8fdb\u5236\u548c16\u8fdb\u5236\uff0c\u5728\u7535\u8111\u79d1\u5b66\u4e2d\uff0c\u7ecf\u5e38\u4f1a\u7528\u523016\u8fdb\u5236\uff0c\u800c\u5341\u8fdb\u5236\u7684\u4f7f\u7528\u975e\u5e38\u5c11\uff0c\u8fd9\u662f\u56e0\u4e3a16\u8fdb\u5236\u548c\u4e8c\u8fdb\u5236\u6709\u5929\u7136\u7684\u8054\u7cfb\uff1a4\u4e2a\u4e8c\u8fdb\u5236\u4f4d\u53ef\u4ee5\u8868\u793a\u4ece0\u523015\u7684\u6570\u5b57\uff0c\u8fd9\u521a\u597d\u662f1\u4e2a16\u8fdb\u5236\u4f4d\u53ef\u4ee5\u8868\u793a\u7684\u6570\u636e\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5c06\u4e8c\u8fdb\u5236\u8f6c\u6362\u621016\u8fdb\u5236\u53ea\u8981\u6bcf4\u4f4d\u8fdb\u884c\u8f6c\u6362\u5c31\u53ef\u4ee5\u4e86\u3002<br>\u4e3a\u4ec0\u4e48\u4f7f\u7528\u4e8c\u8fdb\u5236\u6211\u4eec\u4e86\u89e3\u4e86\uff0c\u73b0\u5728\u5c31\u76f4\u5954\u6211\u4eec\u4e3b\u9898<\/p>\n\n\n\n<p><strong>\u4e8c\u8fdb\u5236\u4f4d\u5206\u6790<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u9996\u5148\u8ba1\u7b97\u673a\u53ea\u8ba4\u8bc6\u4e8c\u8fdb\u5236\u3002\u800c\u4e00\u4e2a\u5b57\u8282\u662f8\u4f4d\u4e8c\u8fdb\u5236\uff0c\u53ea\u75280\u548c1\u6765\u8868\u793a\u72b6\u6001\uff0c\u90a3\u4e48\u6211\u4eec\u770b\u770b\u4e00\u4f4d\u80fd\u8868\u793a\u591a\u5c11\u4e2a\u72b6\u6001<\/p>\n\n\n\n<ul><li>1 \u4f4d\uff1a0 \u548c 1 \u4e5f\u5c31\u662f2\u7684\u4e00\u6b21\u65b9\uff0c\u6700\u591a\u8868\u793a2\u4e2a\u72b6\u6001\uff08\u8981\u4e48\u662f0\uff0c\u8981\u4e48\u662f1\uff09<\/li><li>2 \u4f4d\uff1a00 \u548c 11 \u4e5f\u5c31\u662f2\u76842\u6b21\u65b9\uff0c\u6700\u591a\u8868\u793a4\u4e2a\u72b6\u6001\uff0c\u4e5f\u5c31\u662f\uff0800,01,10,11\uff09<\/li><li>3 \u4f4d\uff1a 000 \u548c 111 \u4e5f\u5c31\u662f2\u76843\u6b21\u65b9\uff0c\u6700\u591a\u8868\u793a8\u4e2a\u72b6\u6001\uff0c\u4e5f\u5c31\u662f\uff08000,001,010,011,100,101,110,111\uff09<\/li><li>\u2026\u2026\u4ee5\u6b64\u7c7b\u63a8<\/li><li>8\u4f4d\uff1a \u5c31\u53ef\u4ee5\u8868\u793a2\u76848\u6b21\u65b9\u4e2a\u72b6\u6001 = 256\u4e2a\u72b6\u6001<\/li><li>9\u4f4d\uff1a\u8868\u793a2\u76849\u6b21\u65b9 = 512\u4e2a\u72b6\u6001<\/li><li>10\u4f4d\uff1a\u8868\u793a2\u768410\u6b21\u65b9 = 1024\u4e2a\u72b6\u6001<\/li><li>32\u4f4d\uff1a\u8868\u793a2\u768432\u6b21\u65b9 = 4294967296\u4e2a\u72b6\u6001<\/li><\/ul>\n\n\n\n<p>\u67e5\u770b\u5e95\u5c42\u6e90\u7801\u6211\u4eec\u53ef\u4ee5\u770b\u5230<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-1024x360.png\" alt=\"\" class=\"wp-image-8177\" width=\"643\" height=\"226\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-1024x360.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-300x105.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-768x270.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-830x292.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-230x81.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-350x123.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-480x169.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247.png 1394w\" sizes=\"(max-width: 643px) 100vw, 643px\" \/><\/figure><\/div>\n\n\n\n<p>\u800cint\u5982\u679c\u8f6c\u6210\u5341\u8fdb\u5236\u7684\u8bdd\uff0c\u90a3\u4e48\u4ed6\u4eec\u7684\u8303\u56f4[-2<sup>31<\/sup>~2<sup>31<\/sup> -1],\u4e5f\u5c31\u662f\u201c-2147483648 ~ 2147483647\u201d<\/p>\n\n\n\n<p>\u8ba1\u7b97\u673a\u4e3a\u4e86\u533a\u5206\u6b63\u8d1f\u6570\uff0c\u6240\u4ee5\u628a256\u4e2a\u72b6\u6001\u4e00\u534a\u7ed9\u4e86\u8d1f\u6570\uff0c\u4e5f\u5c31\u662f\u201c-128~127\u201d\u8fd9256\u4e2a\u6570\uff08\u56e0\u4e3a\u8981\u6b63\u8d1f\uff0c\u6240\u4ee5\u4ece8\u4f4d\u4e2d\u62ff\u8d70\u4ee5\u4e3a\u6765\u8868\u793a\uff09<\/p>\n\n\n\n<p>byte \u5360 1\u4e2a\u5b57\u8282 = 8\u4e2a\u6bd4\u7279\u4f4d \u5c31\u53ef\u4ee5\u8868\u793a2\u76848\u6b21\u65b9\u4e2a\u6570<\/p>\n\n\n\n<p>short\u5360 2\u4e2a\u5b57\u8282 = 16\u4e2a\u6bd4\u7279\u4f4d\u2026\u2026<\/p>\n\n\n\n<p>int \u5360 4 \u4e2a\u5b57\u8282 = 32\u4e2a\u6bd4\u7279\u4f4d<\/p>\n\n\n\n<p><strong>\u90a3\u4e48\u4e3a\u4ec0\u4e48int\u5c31\u5360\u4e864\u4e2a\u5b57\u8282\u5462\uff1f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<pre class=\"wp-block-preformatted\">\n\u5728JAVA\u4e2d\u4e00\u5171\u6709\u516b\u79cd\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff0c\u5b83\u4eec\u5206\u522b\u662f byte\u3001short\u3001int\u3001long\u3001float\u3001double\u3001char\u3001boolean\n<\/pre>\n\n\n\n<p>\u5176\u4e2dbyte\u3001short\u3001int\u3001long\u90fd\u662f\u8868\u793a\u6574\u6570\u7684\uff0c\u53ea\u4e0d\u8fc7\u4ed6\u4eec\u7684\u53d6\u503c\u8303\u56f4\u4e0d\u4e00\u6837<\/p>\n\n\n\n<ul><li>byte \u5360\u75281\u4e2a\u5b57\u8282 \u5b83\u7684\u53d6\u503c\u8303\u56f4\u4e3a -128 ~ 127<\/li><\/ul>\n\n\n\n<p>\u5185\u5b58\u5f00\u9500\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">byte a = 1; \/\/ 00000001<\/pre>\n\n\n\n<ul><li>short \u5360\u75282\u4e2a\u5b57\u8282\uff0c\u5b83\u7684\u53d6\u503c\u8303\u56f4\u4e3a -32768 ~ 32767<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-preformatted\">short a = 1; \/\/ 00000000 00000001<\/pre>\n\n\n\n<ul><li>int\u5360\u75284\u4e2a\u5b57\u8282\uff0c\u5b83\u7684\u53d6\u503c\u8303\u56f4\u4e3a -2147483648 ~ 2147483647<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-preformatted\">int a = 1; \/\/ 00000000 00000000 00000000 00000001<\/pre>\n\n\n\n<ul><li>long\u5360\u75288\u4e2a\u5b57\u8282\uff0c\u5b83\u7684\u53d6\u503c\u8303\u56f4\u4e3a -9223372036854774808 ~ 9223372036854774807<\/li><\/ul>\n\n\n\n<p><strong>\u95ee\uff1a\u6240\u6709\u7684int\u90fd\u662f\u5360\u56db\u4e2a\u5b57\u8282\u5417\uff1f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u56de\u7b54\uff1a\u4e0d\u4e00\u5b9a\u662f4\u4e2a\u5b57\u8282\uff0c\u4ed6\u548c\u64cd\u4f5c\u7cfb\u7edf\u6709\u5173\u7cfb\uff0cint\u5360\u591a\u5c11\u4e2a\u5b57\u8282\u662f\u7531\u7f16\u8bd1\u5668\u51b3\u5b9a\u7684 \u4ee5\u524d16\u4f4d\u7cfb\u7edf\u4e2dint\u662f2\u4e2a\u5b57\u8282\u7684\uff0c\u800c\u73b0\u572832\u4f4d\u7684\u7cfb\u7edf\uff0cint\u662f4\u4e2a\u5b57\u8282\u7684\uff0c\u5176\u5b9e\u73b0\u5728\u57fa\u672c\u4e0a\u90fd\u662f64\u4f4d\u7cfb\u7edf\uff0c \u6240\u8c13\u768416\u4f4d32\u4f4d64\u4f4d\u7cfb\u7edf\u662f\u7531cpu\u51b3\u5b9a\u7684\uff0c\u7531\u673a\u5668\u6307\u4ee4\u7684\u5bfb\u5740\u3001\u5bc4\u5b58\u5668\u4f4d\u6570\u51b3\u5b9a\u7684 os\u53d7cpu\u7684\u9650\u5236\uff0c\u4f46\u572832\u4f4d\u7684cpu\u4e0b16\u4f4d\u7684os\u4e5f\u53ef\u4ee5\u8dd1 \u5f88\u591aos\u662f\u5411\u524d\u517c\u5bb9\u7684\uff0c\u5c31\u662f\u4f7f\u4ee5\u524d\u7684\u7a0b\u5e8f\u4e5f\u80fd\u8fd0\u884c\uff0c\u5982\u679c\u7f16\u8bd1\u5668\u672c\u8eab\u662f16\u4f4d\u65f6\u4ee3\u505a\u7684\uff0c\u90a3\u4e48os\u4f1a\u63d0\u4f9b\u4e00\u4e2a\u6a21\u62df16\u4f4d\u7684\u5b50\u73af\u5883\u4f9b\u8fd9\u4e2a\u7f16\u8bd1\u5668\u4f7f\u7528 \u975e\u8981\u8f6c\u725b\u89d2\u5c16\u7684\u8bdd\uff0cint\u53ea\u662f\u8bed\u8a00\u5b9a\u4e49\u91cc\u9762\u7684\u4e00\u4e2a\u5173\u952e\u5b57\uff0c\u53ea\u5bf9compiler\u53ef\u89c1\uff0ccomplier\u8bf4\u5b83\u662f\u51e0\u4f4d\u5c31\u662f\u51e0\u4f4d\uff0c\u548cos\/cpu\u90fd\u6ca1\u5173\u7cfb<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u5355\u4e86\u89e3\u8ba1\u7b97\u673a\u4e3a\u4ec0\u4e48\u8981\u91c7\u7528\u4e8c\u8fdb\u5236\u8868\u793a\u4fe1\u606f \u56e0\u4e3a\u8ba1\u7b97\u673a\u4f5c\u4e3a\u4e00\u79cd\u7535\u5b50\u8ba1\u7b97\u673a\u5de5\u5177\uff0c\u662f\u7531\u5927\u91cf\u7684\u7535\u5b50\u5668\u4ef6\u7ec4\u6210\u7684\uff0c\u5728\u8fd9\u4e9b\u7535 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/8176"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8176"}],"version-history":[{"count":2,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/8176\/revisions"}],"predecessor-version":[{"id":8179,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/8176\/revisions\/8179"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8176"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8176"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8176"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}