JVM - 基于栈的解释器的执行过程

2018-08-29 本文已影响0人 HRocky

1. 实验代码

public int calc() {
    int a = 100;
    int b = 200;
    int c = 300;
    return (a+b) * c;
}

2. 编译后的字节码片段

 public int calc();
    descriptor: ()I
    flags: ACC_PUBLIC
    Code:
      stack=2, locals=4, args_size=1
         0: bipush        100
         2: istore_1
         3: sipush        200
         6: istore_2
         7: sipush        300
        10: istore_3
        11: iload_1
        12: iload_2
        13: iadd
        14: iload_3
        15: imul
        16: ireturn