java class file及反汇编后的jvm指令

工程目录结构如下：
HStudy
         --src
               --jvm
                      --init
         --classes
               --jvm
                      --init
源码如下：
package jvm.init;
public class Example5 {
public static void main(String[] args) {
int a = 2;
int b = 3;
if (args.length < 2) {
System.out.println("Must enter any two args.");
return;
}

System.out.println(args[0] + args[1]);
}
}

以下是在命令行下的操作：
编译源码   E:\workspace_RIA\HStudy>javac -g -classpath classes -sourcepath src src\jvm\init\Example5.java -d classes
生成的class文件的16进制码如下：
00000000h: CA FE BA BE 00 00 00 31 00 30 0A 00 0A 00 1B 09 ; 漱壕...1.0......
00000010h: 00 1C 00 1D 08 00 1E 0A 00 1F 00 20 07 00 21 0A ; ........... ..!.
00000020h: 00 05 00 1B 0A 00 05 00 22 0A 00 05 00 23 07 00 ; ........"....#..
00000030h: 24 07 00 25 01 00 06 3C 69 6E 69 74 3E 01 00 03 ; $..%...<init>...
00000040h: 28 29 56 01 00 04 43 6F 64 65 01 00 0F 4C 69 6E ; ()V...Code...Lin
00000050h: 65 4E 75 6D 62 65 72 54 61 62 6C 65 01 00 12 4C ; eNumberTable...L
00000060h: 6F 63 61 6C 56 61 72 69 61 62 6C 65 54 61 62 6C ; ocalVariableTabl
00000070h: 65 01 00 04 74 68 69 73 01 00 13 4C 6A 76 6D 2F ; e...this...Ljvm/
00000080h: 69 6E 69 74 2F 45 78 61 6D 70 6C 65 35 3B 01 00 ; init/Example5;..
00000090h: 04 6D 61 69 6E 01 00 16 28 5B 4C 6A 61 76 61 2F ; .main...([Ljava/
000000a0h: 6C 61 6E 67 2F 53 74 72 69 6E 67 3B 29 56 01 00 ; lang/String;)V..
000000b0h