{"id":16137,"date":"2024-07-30T14:32:04","date_gmt":"2024-07-30T06:32:04","guid":{"rendered":"https:\/\/92it.top\/?p=16137"},"modified":"2024-07-30T14:32:04","modified_gmt":"2024-07-30T06:32:04","slug":"%e4%bb%80%e4%b9%88%e6%98%af-jvm-%e5%ad%97%e8%8a%82%e7%a0%81%ef%bc%9f%e5%ae%83%e6%98%af%e5%a6%82%e4%bd%95%e5%b7%a5%e4%bd%9c%e7%9a%84%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=16137","title":{"rendered":"\u4ec0\u4e48\u662f JVM \u5b57\u8282\u7801\uff1f\u5b83\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff1f"},"content":{"rendered":"\n

\u8f6c\u8f7d\uff1a\u817e\u8baf3\u9762\uff1a\u4ec0\u4e48\u662f JVM \u5b57\u8282\u7801\uff1f\u5b83\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff1f<\/a><\/p>\n\n\n\n

\u4f5c\u4e3a Java\u7a0b\u5e8f\u5458\u90fd\u77e5\u9053 Java\u662f\u8de8\u5e73\u53f0\u7684\u8bed\u8a00\uff0c\u7f16\u8bd1\u4e00\u6b21\u5230\u5904\u8fd0\u884c\uff0c\u8fd9\u5f97\u76ca\u4e8e JVM\u5b57\u8282\u7801\uff0c\u8fd9\u7bc7\u6587\u7ae0\uff0c\u6211\u4eec\u5c06\u4e00\u8d77\u5206\u6790\u4ec0\u4e48\u662fJVM<\/code>\u5b57\u8282\u7801\uff1f\u5982\u4f55\u67e5\u770b JVM<\/code>\u5b57\u8282\u7801\uff1fJVM<\/code>\u5b57\u8282\u7801\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff1f<\/p>\n\n\n\n

\u4ec0\u4e48 JVM \u5b57\u8282\u7801?<\/strong><\/p>\n\n\n\n

\n\n\n\n

Java \u6e90\u4ee3\u7801\u7ecf\u8fc7\u7f16\u8bd1\u5668\u7f16\u8bd1\u540e\uff0c\u5c31\u4f1a\u751f\u6210 JVM<\/code> \u5b57\u8282\u7801\uff0c\u5b83\u662f\u4e00\u79cd\u57fa\u4e8e\u6808\u7684\u4f4e\u7ea7\u3001\u4e2d\u7acb\u4e8e\u5e73\u53f0\u7684\u6307\u4ee4\u67b6\u6784\uff0c\u6bcf\u4e2a\u5b57\u8282\u7801\u6307\u4ee4\u90fd\u4f1a\u5728 JVM<\/code> \u4e0a\u6267\u884c\u4e00\u7cfb\u5217\u7684\u64cd\u4f5c\uff0c\u5982\u52a0\u8f7d\u3001\u5b58\u50a8\u3001\u8fd0\u7b97\u3001\u8df3\u8f6c\u7b49\u3002\u5b83\u4f7f\u7528\u57fa\u4e8e\u64cd\u4f5c\u6570\u6808\u548c\u5c40\u90e8\u53d8\u91cf\u8868\u7684\u6267\u884c\u6a21\u578b\u3002<\/p>\n\n\n\n

JVM<\/code> \u5b57\u8282\u7801\u5177\u6709\u4ee5\u4e0b\u7279\u70b9\uff1a<\/p>\n\n\n\n

    \n
  • \u72ec\u7acb\u4e8e\u5177\u4f53\u7684\u786c\u4ef6\u548c\u64cd\u4f5c\u7cfb\u7edf\uff0c\u4e0d\u540c\u5e73\u53f0\u4e0a\u7684 JVM<\/code> \u53ef\u4ee5\u89e3\u91ca\u548c\u6267\u884c\u76f8\u540c\u7684\u5b57\u8282\u7801\u6587\u4ef6\u3002<\/li>\n\n\n\n
  • \u76f8\u5bf9\u4e8e\u673a\u5668\u7801\u548c\u6e90\u4ee3\u7801\uff0cJVM<\/code> \u5b57\u8282\u7801\u662f\u4e00\u79cd\u66f4\u9ad8\u7ea7\u522b\u7684\u62bd\u8c61\uff0c\u5e76\u4e14\u6bd4\u673a\u5668\u7801\u66f4\u5bb9\u6613\u9605\u8bfb\u548c\u7f16\u5199\u3002<\/li>\n\n\n\n
  • JVM<\/code> \u5b57\u8282\u7801\u901a\u8fc7\u8fd0\u884c\u65f6\u7684\u5373\u65f6\u7f16\u8bd1\u5668\u6216\u89e3\u91ca\u5668\u6267\u884c\u3002<\/li>\n<\/ul>\n\n\n\n

    \u56e0\u6b64\uff0c\u53ea\u8981\u5728\u4e0d\u540c\u5e73\u53f0\u4e0a\u5b89\u88c5\u76f8\u5e94\u7684 JVM\uff0c\u5c31\u80fd\u5728\u8fd9\u4e9b\u5e73\u53f0\u4e0a\u8fd0\u884c\u76f8\u540c\u7684\u5b57\u8282\u7801\uff0c\u8fd9\u79cd\u7279\u6027\u4e3a Java \u7a0b\u5e8f\u63d0\u4f9b\u4e86\u5f88\u9ad8\u7684\u53ef\u79fb\u690d\u6027\u548c\u517c\u5bb9\u6027\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u4e5f\u53ef\u4ee5\u7f16\u8bd1\u6210 JVM \u5b57\u8282\u7801\uff0c\u5229\u7528 JVM \u7684\u4f18\u52bf\u3002\u8fd9\u4e9b\u7f16\u7a0b\u8bed\u8a00\u53eb\u505a\u57fa\u4e8e JVM \u7684\u8bed\u8a00\uff0c\u4f8b\u5982 Kotlin\u3001Groovy \u7b49\u3002<\/p>\n\n\n\n

    \u5982\u4f55\u67e5\u770b JVM \u5b57\u8282\u7801\uff1f<\/strong><\/p>\n\n\n\n

    \n\n\n\n

    \u901a\u8fc7 javap -c ClassName<\/code>\u6307\u4ee4\u5c31\u53ef\u4ee5\u67e5\u770b JVM\u5b57\u8282\u7801\uff0c\u4e3a\u4e86\u66f4\u597d\u7684\u8bf4\u660e\uff0c\u4e0b\u9762\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684 Java\u7a0b\u5e8f\u548c\u5bf9\u5e94\u7684 JVM<\/code>\u5b57\u8282\u7801\u793a\u4f8b\u6765\u8fdb\u884c\u6f14\u793a\uff1a<\/p>\n\n\n\n

    \u793a\u4f8b\u4ee3\u7801<\/strong><\/p>\n\n\n\n

    \u5982\u4e0b\u4ee3\u7801\uff0c\u5728\u63a7\u5236\u53f0\u8f93\u51fa\u201cHello, World\u201d\uff1a<\/p>\n\n\n\n

    public class HelloWorld {\n    public static void main(String[] args) {\n        System.out.println(\"Hello, World!\");\n    }\n}<\/pre>\n\n\n\n
    \u4f7f\u7528 javac<\/code> \u547d\u4ee4\u7f16\u8bd1\u4e0a\u8ff0 Java \u6e90\u4ee3\u7801\u540e\u4f1a\u751f\u6210\u4e00\u4e2a HelloWorld.class \u6587\u4ef6\uff0c\u7136\u540e\u4f7f\u7528javap -c HelloWorld<\/code>\u547d\u4ee4\u67e5\u770b\u5b57\u8282\u7801\uff0c\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n\n\n\n
    Compiled from \"HelloWorld.java\"\npublic class HelloWorld {\n  public HelloWorld();\n    Code:\n       0: aload_0\n       1: invokespecial #1      \/\/ Method java\/lang\/Object.\"<init>\":()V\n       4: return\n\n  public static void main(java.lang.String[]);\n    Code:\n       0: getstatic     #2     \/\/ Field java\/lang\/System.out:Ljava\/io\/PrintStream;\n       3: ldc           #3     \/\/ String Hello, World!\n       5: invokevirtual #4     \/\/ Method java\/io\/PrintStream.println:(Ljava\/lang\/String;)V\n       8: return\n}<\/pre>\n\n\n\n
    \u5b57\u8282\u7801\u89e3\u91ca<\/strong><\/p>\n\n\n\n
    1.\u6784\u9020\u65b9\u6cd5 HelloWorld()<\/strong><\/p>\n\n\n\n
      \n
    • aload_0<\/code>: \u52a0\u8f7d\u5c40\u90e8\u53d8\u91cf\u8868\u4e2d\u7b2c\u4e00\u4e2a\u53d8\u91cf\uff08\u5373this\u5f15\u7528\uff09\u3002<\/li>\n\n\n\n
    • invokespecial<\/code> #1: \u8c03\u7528\u7236\u7c7b\uff08java\/lang\/Object\uff09\u7684\u6784\u9020\u65b9\u6cd5\u3002<\/li>\n\n\n\n
    • return<\/code>: \u4ece\u6784\u9020\u65b9\u6cd5\u8fd4\u56de\u3002<\/li>\n<\/ul>\n\n\n\n
      2. main\u65b9\u6cd5<\/strong><\/p>\n\n\n\n
        \n
      • getstatic<\/code> #2: \u83b7\u53d6\u9759\u6001\u5b57\u6bb5java\/lang\/System.out\uff0c\u5b83\u662f\u4e00\u4e2a PrintStream \u5bf9\u8c61\u3002<\/li>\n\n\n\n
      • ldc #3<\/code>: \u5c06\u5e38\u91cf\u6c60\u4e2d\u7d22\u5f15\u4e3a3\u7684\u9879\uff08\u5373\u5b57\u7b26\u4e32”Hello, World!”\uff09\u52a0\u8f7d\u5230\u64cd\u4f5c\u6570\u6808\u3002<\/li>\n\n\n\n
      • invokevirtual #4<\/code>: \u8c03\u7528 PrintStream \u7684 println \u65b9\u6cd5\uff0c\u53c2\u6570\u662f\u6808\u9876\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n\n\n\n
      • return<\/code>: \u4ecemain\u65b9\u6cd5\u8fd4\u56de\u3002<\/li>\n<\/ul>\n\n\n\n
        3. \u5173\u952e\u5b57\u8282\u7801\u6307\u4ee4\u89e3\u6790<\/strong><\/p>\n\n\n\n
          \n
        • aload_0<\/code>: \u52a0\u8f7d\u5c40\u90e8\u53d8\u91cf\u8868\u4e2d\u7d22\u5f15\u4e3a 0\u7684\u5f15\u7528\u7c7b\u578b\u53d8\u91cf\u5230\u64cd\u4f5c\u6570\u6808\u3002<\/li>\n\n\n\n
        • invokespecial<\/code>: \u8c03\u7528\u5b9e\u4f8b\u521d\u59cb\u5316\u65b9\u6cd5\u548c\u79c1\u6709\u65b9\u6cd5\u3002<\/li>\n\n\n\n
        • getstatic<\/code>: \u83b7\u53d6\u9759\u6001\u5b57\u6bb5\u7684\u503c\u5e76\u5c06\u5176\u538b\u5165\u64cd\u4f5c\u6570\u6808\u3002<\/li>\n\n\n\n
        • ldc<\/code>: \u5c06\u5e38\u91cf\u6c60\u4e2d\u7684\u5e38\u91cf\u52a0\u8f7d\u5230\u64cd\u4f5c\u6570\u6808\u3002<\/li>\n\n\n\n
        • invokevirtual<\/code>: \u8c03\u7528\u5bf9\u8c61\u7684\u5b9e\u4f8b\u65b9\u6cd5\uff0c\u65b9\u6cd5\u7684\u9009\u62e9\u662f\u57fa\u4e8e\u5bf9\u8c61\u7684\u8fd0\u884c\u65f6\u7c7b\u578b\u3002<\/li>\n<\/ul>\n\n\n\n
          \u901a\u8fc7\u8fd9\u4e2a\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230 Java\u6e90\u4ee3\u7801\u88ab\u7f16\u8bd1\u6210 JVM \u5b57\u8282\u7801\u540e\u662f\u4ec0\u4e48\u6837\u5b50\u3002<\/p>\n\n\n\n
          JVM\u5b57\u8282\u7801\u6307\u4ee4\u96c6<\/strong><\/p>\n\n\n\n
          \n\n\n\n
          \u901a\u8fc7\u4e0a\u8ff0\u67e5\u770b JVM<\/code>\u5b57\u8282\u7801\u7684\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5f88\u591a JVM<\/code>\u5185\u90e8\u7684\u6307\u4ee4\uff0c\u6bd4\u5982\u52a0\u8f7d\u3001\u5b58\u50a8\u3001\u8fd0\u7b97\u3001\u8df3\u8f6c\u7b49\u3002JVM<\/code>\u5b57\u8282\u7801\u6307\u4ee4\u96c6\uff08Bytecode Instruction Set\uff09\u662f JVM<\/code>\u7528\u6765\u6267\u884c Java \u7a0b\u5e8f\u7684\u6307\u4ee4\u96c6\u5408\uff0c\u6bcf\u6761\u5b57\u8282\u7801\u6307\u4ee4\u7531\u4e00\u4e2a\u5b57\u8282\u7684\u64cd\u4f5c\u7801\uff08opcode\uff09\u548c\u53ef\u9009\u7684\u64cd\u4f5c\u6570\u7ec4\u6210\u3002<\/p>\n\n\n\n
          \u4ee5\u4e0b\u662f JVM<\/code> \u5b57\u8282\u7801\u6307\u4ee4\u96c6\u7684\u4e00\u4e9b\u4e3b\u8981\u7c7b\u522b\u548c\u5177\u4f53\u6307\u4ee4\uff1a<\/p>\n\n\n\n
          \u52a0\u8f7d\u548c\u5b58\u50a8\u6307\u4ee4<\/strong><\/p>\n\n\n\n
          \u52a0\u8f7d\u548c\u5b58\u50a8\u6307\u4ee4\uff0c\u5168\u79f0 Load and Store Instructions\uff0c\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a\u6307\u4ee4\uff1a<\/p>\n\n\n\n
            \n
          • aload<\/code>: \u4ece\u5c40\u90e8\u53d8\u91cf\u8868\u52a0\u8f7d\u5f15\u7528\u7c7b\u578b\u53d8\u91cf\u5230\u64cd\u4f5c\u6570\u6808\u3002<\/li>\n\n\n\n
          • astore<\/code>: \u5c06\u64cd\u4f5c\u6570\u6808\u9876\u7684\u5f15\u7528\u7c7b\u578b\u53d8\u91cf\u5b58\u50a8\u5230\u5c40\u90e8\u53d8\u91cf\u8868\u3002<\/li>\n\n\n\n
          • iload<\/code>: \u4ece\u5c40\u90e8\u53d8\u91cf\u8868\u52a0\u8f7d\u6574\u6570\u7c7b\u578b\u53d8\u91cf\u5230\u64cd\u4f5c\u6570\u6808\u3002<\/li>\n\n\n\n
          • istore<\/code>: \u5c06\u64cd\u4f5c\u6570\u6808\u9876\u7684\u6574\u6570\u7c7b\u578b\u53d8\u91cf\u5b58\u50a8\u5230\u5c40\u90e8\u53d8\u91cf\u8868\u3002<\/li>\n\n\n\n
          • dload, fload, lload<\/code>: \u52a0\u8f7d\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3001\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570\u548c\u957f\u6574\u6570\u7c7b\u578b\u53d8\u91cf\u3002<\/li>\n\n\n\n
          • dstore, fstore, lstore<\/code>: \u5b58\u50a8\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3001\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570\u548c\u957f\u6574\u6570\u7c7b\u578b\u53d8\u91cf\u3002<\/li>\n<\/ul>\n\n\n\n
            \u7b97\u672f\u8fd0\u7b97\u6307\u4ee4<\/strong><\/p>\n\n\n\n
            \u7b97\u672f\u8fd0\u7b97\u6307\u4ee4\uff0c\u5168\u79f0 Arithmetic Instructions\uff0c\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a\u6307\u4ee4\uff1a<\/p>\n\n\n\n
              \n
            • iadd<\/code>: \u5bf9\u6808\u9876\u7684\u4e24\u4e2a\u6574\u6570\u8fdb\u884c\u52a0\u6cd5\u8fd0\u7b97\u3002<\/li>\n\n\n\n
            • isub<\/code>: \u5bf9\u6808\u9876\u7684\u4e24\u4e2a\u6574\u6570\u8fdb\u884c\u51cf\u6cd5\u8fd0\u7b97\u3002<\/li>\n\n\n\n
            • imul<\/code>: \u5bf9\u6808\u9876\u7684\u4e24\u4e2a\u6574\u6570\u8fdb\u884c\u4e58\u6cd5\u8fd0\u7b97\u3002<\/li>\n\n\n\n
            • idiv<\/code>: \u5bf9\u6808\u9876\u7684\u4e24\u4e2a\u6574\u6570\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\u3002<\/li>\n\n\n\n
            • iinc<\/code>: \u5bf9\u5c40\u90e8\u53d8\u91cf\u8868\u4e2d\u7684\u6574\u6570\u53d8\u91cf\u8fdb\u884c\u81ea\u589e\u3002<\/li>\n\n\n\n
            • dadd, fadd, ladd<\/code>: \u52a0\u6cd5\u8fd0\u7b97\uff08\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3001\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3001\u957f\u6574\u6570\uff09\u3002<\/li>\n\n\n\n
            • dsub, fsub, lsub<\/code>: \u51cf\u6cd5\u8fd0\u7b97\uff08\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3001\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3001\u957f\u6574\u6570\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
              \u7c7b\u578b\u8f6c\u6362\u6307\u4ee4<\/strong><\/p>\n\n\n\n
              \u7c7b\u578b\u8f6c\u6362\u6307\u4ee4\uff0c\u5168\u79f0 Type Conversion Instructions\uff0c\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a\u6307\u4ee4\uff1a<\/p>\n\n\n\n
                \n
              • i2d<\/code>: \u6574\u6570\u8f6c\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3002<\/li>\n\n\n\n
              • i2f<\/code>: \u6574\u6570\u8f6c\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3002<\/li>\n\n\n\n
              • i2l<\/code>: \u6574\u6570\u8f6c\u957f\u6574\u6570\u3002<\/li>\n\n\n\n
              • d2i, f2i, l2i<\/code>: \u8f6c\u6362\u4e3a\u6574\u6570\u3002<\/li>\n<\/ul>\n\n\n\n
                \u5bf9\u8c61\u64cd\u4f5c\u6307\u4ee4<\/strong><\/p>\n\n\n\n
                \u5bf9\u8c61\u64cd\u4f5c\u6307\u4ee4\uff0c\u5168\u79f0 Object Manipulation Instructions\uff0c\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a\u6307\u4ee4\uff1a<\/p>\n\n\n\n
                  \n
                • new<\/code>: \u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\u5b9e\u4f8b\u3002<\/li>\n\n\n\n
                • newarray<\/code>: \u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u3002<\/li>\n\n\n\n
                • anewarray<\/code>: \u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\u3002<\/li>\n\n\n\n
                • checkcast<\/code>: \u68c0\u67e5\u5bf9\u8c61\u662f\u5426\u4e3a\u67d0\u4e00\u7c7b\u578b\u7684\u5b9e\u4f8b\u3002<\/li>\n\n\n\n
                • instanceof<\/code>: \u5224\u65ad\u5bf9\u8c61\u662f\u5426\u662f\u67d0\u4e00\u7c7b\u578b\u7684\u5b9e\u4f8b\u3002<\/li>\n<\/ul>\n\n\n\n
                  \u65b9\u6cd5\u8c03\u7528\u548c\u8fd4\u56de\u6307\u4ee4<\/strong><\/p>\n\n\n\n
                  \u65b9\u6cd5\u8c03\u7528\u548c\u8fd4\u56de\u6307\u4ee4\uff0c\u5168\u79f0 Method Invocation and Return Instructions\uff0c\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a\u6307\u4ee4\uff1a<\/p>\n\n\n\n
                    \n
                  • invokestatic<\/code>: \u8c03\u7528\u9759\u6001\u65b9\u6cd5\u3002<\/li>\n\n\n\n
                  • invokevirtual<\/code>: \u8c03\u7528\u5b9e\u4f8b\u65b9\u6cd5\uff0c\u6839\u636e\u5bf9\u8c61\u7684\u5b9e\u9645\u7c7b\u578b\u8fdb\u884c\u5206\u6d3e\u3002<\/li>\n\n\n\n
                  • invokespecial<\/code>: \u8c03\u7528\u5b9e\u4f8b\u521d\u59cb\u5316\u65b9\u6cd5\u3001\u79c1\u6709\u65b9\u6cd5\u548c\u7236\u7c7b\u65b9\u6cd5\u3002<\/li>\n\n\n\n
                  • invokeinterface<\/code>: \u8c03\u7528\u63a5\u53e3\u65b9\u6cd5\u3002<\/li>\n\n\n\n
                  • return<\/code>: \u4ece\u65b9\u6cd5\u8fd4\u56de\uff08\u65e0\u8fd4\u56de\u503c\uff09\u3002<\/li>\n\n\n\n
                  • ireturn, dreturn, freturn, lreturn, areturn<\/code>: \u4ece\u65b9\u6cd5\u8fd4\u56de\uff08\u8fd4\u56de\u503c\u4e3a\u6574\u6570\u3001\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3001\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570\u3001\u957f\u6574\u6570\u3001\u5f15\u7528\u7c7b\u578b\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
                    \u63a7\u5236\u6d41\u6307\u4ee4<\/strong><\/p>\n\n\n\n
                    \u63a7\u5236\u6d41\u6307\u4ee4\uff0c\u5168\u79f0 Control Flow Instructions\uff0c\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a\u6307\u4ee4\uff1a<\/p>\n\n\n\n
                      \n
                    • goto<\/code>: \u65e0\u6761\u4ef6\u8df3\u8f6c\u3002<\/li>\n\n\n\n
                    • ifeq<\/code>: \u5982\u679c\u6808\u9876\u6574\u6570\u4e3a0\uff0c\u5219\u8df3\u8f6c\u3002<\/li>\n\n\n\n
                    • ifne<\/code>: \u5982\u679c\u6808\u9876\u6574\u6570\u4e0d\u4e3a0\uff0c\u5219\u8df3\u8f6c\u3002<\/li>\n\n\n\n
                    • iflt, ifge, ifgt, ifle<\/code>: \u6bd4\u8f83\u6808\u9876\u6574\u6570\uff0c\u5e76\u6839\u636e\u7ed3\u679c\u8df3\u8f6c\u3002<\/li>\n\n\n\n
                    • tableswitch<\/code>: \u7528\u4e8eswitch\u8bed\u53e5\u7684\u591a\u8def\u5206\u652f\u8df3\u8f6c\u3002<\/li>\n\n\n\n
                    • lookupswitch<\/code>: \u7528\u4e8eswitch\u8bed\u53e5\u7684\u67e5\u627e\u8868\u8df3\u8f6c\u3002<\/li>\n<\/ul>\n\n\n\n
                      \u5f02\u5e38\u5904\u7406\u6307\u4ee4<\/strong><\/p>\n\n\n\n
                      \u5f02\u5e38\u5904\u7406\u6307\u4ee4\uff0c\u5168\u79f0 Exception Handling Instructions\uff0c\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a\u6307\u4ee4\uff1a<\/p>\n\n\n\n
                        \n
                      • athrow<\/code>: \u629b\u51fa\u5f02\u5e38\u6216\u9519\u8bef\u3002<\/li>\n\n\n\n
                      • try-catch<\/code>\u5757\uff1a\u901a\u8fc7\u5f02\u5e38\u8868\u5b9e\u73b0\uff0c\u4e0d\u662f\u5177\u4f53\u7684\u5b57\u8282\u7801\u6307\u4ee4\u3002<\/li>\n<\/ul>\n\n\n\n
                        \u540c\u6b65\u6307\u4ee4<\/strong><\/p>\n\n\n\n
                        \u540c\u6b65\u6307\u4ee4\uff0c\u5168\u79f0 Synchronization Instructions\uff0c\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a\u6307\u4ee4\uff1a<\/p>\n\n\n\n
                          \n
                        • monitorenter<\/code>: \u83b7\u53d6\u5bf9\u8c61\u7684\u76d1\u89c6\u5668\u9501\u3002<\/li>\n\n\n\n
                        • monitorexit<\/code>: \u91ca\u653e\u5bf9\u8c61\u7684\u76d1\u89c6\u5668\u9501\u3002<\/li>\n<\/ul>\n\n\n\n
                          \u6808\u64cd\u4f5c\u6307\u4ee4<\/strong><\/p>\n\n\n\n
                          \u6808\u64cd\u4f5c\u6307\u4ee4\uff0c\u5168\u79f0 Stack Operations Instructions\uff0c\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a\u6307\u4ee4\uff1a<\/p>\n\n\n\n
                            \n
                          • pop<\/code>: \u5f39\u51fa\u6808\u9876\u7684\u4e00\u4e2a\u5143\u7d20\u3002<\/li>\n\n\n\n
                          • dup<\/code>: \u590d\u5236\u6808\u9876\u7684\u4e00\u4e2a\u5143\u7d20\u3002<\/li>\n\n\n\n
                          • swap<\/code>: \u4ea4\u6362\u6808\u9876\u7684\u4e24\u4e2a\u5143\u7d20\u3002<\/li>\n<\/ul>\n\n\n\n
                            JVM \u5982\u4f55\u6267\u884c\u5b57\u8282\u7801\uff1f<\/strong><\/p>\n\n\n\n
                            \n\n\n\n
                            JVM<\/code> \u5b57\u8282\u7801\u7684\u6267\u884c\u8fc7\u7a0b\u4e3b\u8981\u4f9d\u8d56\u4e8e Java \u865a\u62df\u673a\u7684\u89e3\u91ca\u5668\u548c\u5373\u65f6\u7f16\u8bd1\u5668\uff08Just-In-Time Compiler\uff0c\u7b80\u79f0JIT\uff09\u3002JVM<\/code>\u4f1a\u5c06\u5b57\u8282\u7801\u8bfb\u53d6\u5230\u5185\u5b58\u4e2d\uff0c\u5e76\u9010\u6761\u89e3\u91ca\u6267\u884c\uff0c\u6216\u8005\u5c06\u70ed\u70b9\u4ee3\u7801\u7f16\u8bd1\u4e3a\u673a\u5668\u7801\u6765\u63d0\u9ad8\u6267\u884c\u6548\u7387\u3002<\/p>\n\n\n\n
                            \u4e3a\u4e86\u66f4\u597d\u5730\u8bf4\u660e JVM \u5b57\u8282\u7801\u7684\u6267\u884c\u8fc7\u7a0b\uff0c\u6211\u4eec\u8fd8\u662f\u901a\u8fc7\u4e00\u4e2a\u5177\u4f53\u7684\u793a\u4f8b\u6765\u8fdb\u884c\u8bf4\u660e\u3002<\/p>\n\n\n\n
                            \u793a\u4f8b\u4ee3\u7801<\/strong><\/p>\n\n\n\n
                            \u8fd9\u91cc\u4ee5 a + b \u6c42\u548c\u4e3a\u4f8b\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                            public class Sum {\n    public static int add(int a, int b) {\n        return a + b;\n    }\n}<\/pre>\n\n\n\n
                            \u4f7f\u7528 javap -c Sum<\/code> \u547d\u4ee4\u83b7\u53d6\u5b57\u8282\u7801\uff0c\u5177\u4f53\u4fe1\u606f\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                            Compiled from \"Sum.java\"\npublic class Sum {\n  public Sum();\n    Code:\n       0: aload_0\n       1: invokespecial #1     \/\/ Method java\/lang\/Object.\"<init>\":()V\n       4: return\n\n  public static int add(int, int);\n    Code:\n       0: iload_0\n       1: iload_1\n       2: iadd\n       3: ireturn\n}<\/pre>\n\n\n\n
                            \u5b57\u8282\u7801\u89e3\u91ca<\/strong><\/p>\n\n\n\n
                            1. \u6784\u9020\u65b9\u6cd5 Sum()<\/strong><\/p>\n\n\n\n
                              \n
                            • aload_0<\/code>: \u52a0\u8f7d\u5c40\u90e8\u53d8\u91cf\u8868\u4e2d\u7b2c\u4e00\u4e2a\u53d8\u91cf\uff08\u5373this\u5f15\u7528\uff09\u3002<\/li>\n\n\n\n
                            • invokespecial #1<\/code>: \u8c03\u7528\u7236\u7c7b\uff08java\/lang\/Object\uff09\u7684\u6784\u9020\u65b9\u6cd5\u3002<\/li>\n\n\n\n
                            • return<\/code>: \u4ece\u6784\u9020\u65b9\u6cd5\u8fd4\u56de\u3002<\/li>\n<\/ul>\n\n\n\n
                              2. add()\u65b9\u6cd5<\/strong><\/p>\n\n\n\n
                                \n
                              • iload_0<\/code>: \u52a0\u8f7d\u5c40\u90e8\u53d8\u91cf\u8868\u4e2d\u7d22\u5f15\u4e3a0\u7684\u6574\u6570\uff08\u5373\u53c2\u6570a\uff09\u5230\u64cd\u4f5c\u6570\u6808\u3002<\/li>\n\n\n\n
                              • iload_1<\/code>: \u52a0\u8f7d\u5c40\u90e8\u53d8\u91cf\u8868\u4e2d\u7d22\u5f15\u4e3a1\u7684\u6574\u6570\uff08\u5373\u53c2\u6570b\uff09\u5230\u64cd\u4f5c\u6570\u6808\u3002<\/li>\n\n\n\n
                              • iadd<\/code>: \u5f39\u51fa\u64cd\u4f5c\u6570\u6808\u9876\u7684\u4e24\u4e2a\u6574\u6570\uff0c\u8fdb\u884c\u52a0\u6cd5\u8fd0\u7b97\uff0c\u5e76\u5c06\u7ed3\u679c\u538b\u5165\u64cd\u4f5c\u6570\u6808\u3002<\/li>\n\n\n\n
                              • ireturn<\/code>: \u4ece\u65b9\u6cd5\u8fd4\u56de\uff0c\u5e76\u5c06\u64cd\u4f5c\u6570\u6808\u9876\u7684\u6574\u6570\u4f5c\u4e3a\u8fd4\u56de\u503c\u3002<\/li>\n<\/ul>\n\n\n\n
                                \u6267\u884c\u8fc7\u7a0b<\/strong><\/p>\n\n\n\n
                                \u5047\u8bbe\u6211\u4eec\u5728\u53e6\u4e00\u4e2a\u7c7b\u4e2d\u8c03\u7528Sum.add(2, 3)<\/code>\uff0c\u6267\u884c\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                                  \n
                                • JVM<\/code>\u5c06\u53c2\u6570 2\u548c 3\u538b\u5165\u5c40\u90e8\u53d8\u91cf\u8868\uff0ciload_0<\/code>\u6307\u4ee4\u5c06\u53c2\u6570 2\u52a0\u8f7d\u5230\u64cd\u4f5c\u6570\u6808\u3002<\/li>\n\n\n\n
                                • iload_1<\/code>\u6307\u4ee4\u5c06\u53c2\u6570 3\u52a0\u8f7d\u5230\u64cd\u4f5c\u6570\u6808\u3002<\/li>\n\n\n\n
                                • iadd<\/code>\u6307\u4ee4\u5f39\u51fa\u64cd\u4f5c\u6570\u6808\u9876\u7684\u4e24\u4e2a\u503c\uff082\u548c3\uff09\uff0c\u8fdb\u884c\u52a0\u6cd5\u8fd0\u7b97\uff0c\u5c06\u7ed3\u679c5\u538b\u5165\u64cd\u4f5c\u6570\u6808\u3002<\/li>\n\n\n\n
                                • ireturn<\/code>\u6307\u4ee4\u5c06\u64cd\u4f5c\u6570\u6808\u9876\u7684\u503c\uff085\uff09\u4f5c\u4e3a\u8fd4\u56de\u503c\u8fd4\u56de\u7ed9\u8c03\u7528\u8005\u3002<\/li>\n<\/ul>\n\n\n\n
                                  \u603b\u7ed3<\/strong><\/p>\n\n\n\n
                                  \n\n\n\n
                                  \u672c\u6587\uff0c\u6211\u4eec\u5206\u6790\u4e86\u4ec0\u4e48\u662fJVM<\/code>\u5b57\u8282\u7801\uff0c\u5982\u4f55\u67e5\u770bJVM<\/code>\u5b57\u8282\u7801\u4ee5\u53caJVM<\/code>\u5982\u4f55\u6267\u884c\u5b57\u8282\u7801\uff0c\u638c\u63e1\u8fd9\u4e9b\u5e95\u5c42\u4e0d\u4f46\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u66f4\u597d\u7684\u7406\u89e3\uff0c\u4e3a\u4ec0\u4e48 Java\u53ef\u4ee5\u7f16\u8bd1\u4e00\u6b21\uff0c\u5230\u5904\u8fd0\u884c\uff0c\u8fd8\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u66f4\u597d\u7684\u4e86\u89e3 Java\u7684\u8fd0\u884c\u673a\u5236\u4ee5\u53ca\u7406\u89e3 Java\u7684\u7f16\u7a0b\u7cbe\u9ad3\u3002<\/p>\n\n\n\n
                                  \u6587\u7ae0\u603b\u7ed3\u4e0d\u6613\uff0c\u770b\u5230\u8fd9\u91cc\u7684\u5c0f\u4f19\u4f34\u5e2e\u5fd9\u70b9\u8d5e\uff0c\u5728\u770b\u5457\uff0c\u5982\u679c\u89c9\u5f97\u6587\u7ae0\u5bf9\u4f60\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u8f6c\u53d1\u7ed9\u66f4\u591a\u7684\u597d\u53cb\uff0c\u5173\u6ce8\u300c\u733fjava\u300d\uff0c\u52a0\u5165\u6280\u672f\u7fa4\uff0c\u6301\u7eed\u5b66\u4e60\u66f4\u591a\u786c\u6838\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                                  \u8f6c\u8f7d\uff1a\u817e\u8baf3\u9762\uff1a\u4ec0\u4e48\u662f JVM \u5b57\u8282\u7801\uff1f\u5b83\u662f\u5982\u4f55\u5de5\u4f5c\u7684\uff1f \u4f5c\u4e3a Java\u7a0b\u5e8f\u5458\u90fd\u77e5\u9053 Java\u662f\u8de8\u5e73\u53f0\u7684\u8bed\u8a00\uff0c […]<\/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\/16137"}],"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=16137"}],"version-history":[{"count":1,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/16137\/revisions"}],"predecessor-version":[{"id":16138,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/16137\/revisions\/16138"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16137"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16137"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16137"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}