解释下用javap反编译后的代码

Java code

public class WhitherStringBuilder {  public String implicit(String[] fields) {    String result="";    for(int i=0;i<fields.length;i++)      result+=fields[i];    return result;  }  public String explicit(String[] fields) {    StringBuilder result=new StringBuilder();    for(int i=0;i<fields.length;i++)      result.append(fields[i]);    return result.toString();  }}

Java code

public class WhitherStringBuilder extends java.lang.Object{public WhitherStringBuilder();  Code:   0:   aload_0   1:   invokespecial   #1; //Method java/lang/Object."<init>":()V   4:   returnpublic java.lang.String implicit(java.lang.String[]);  Code:   0:   ldc     #2; //String   2:   astore_2   3:   iconst_0   4:   istore_3   5:   iload_3   6:   aload_1   7:   arraylength   8:   if_icmpge       38   11:  new     #3; //class java/lang/StringBuilder   14:  dup   15:  invokespecial   #4; //Method java/lang/StringBuilder."<init>":()V   18:  aload_2   19:  invokevirtual   #5; //Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;   22:  aload_1   23:  iload_3   24:  aaload   25:  invokevirtual   #5; //Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;   28:  invokevirtual   #6; //Method java/lang/StringBuilder.toString:()Ljava/lang/String;   31:  astore_2   32:  iinc    3, 1   35:  goto    5   38:  aload_2   39:  areturnpublic java.lang.String explicit(java.lang.String[]);  Code:   0:   new     #3; //class java/lang/StringBuilder   3:   dup   4:   invokespecial   #4; //Method java/lang/StringBuilder."<init>":()V   7:   astore_2   8:   iconst_0   9:   istore_3   10:  iload_3   11:  aload_1   12:  arraylength   13:  if_icmpge       30   16:  aload_2   17:  aload_1   18:  iload_3   19:  aaload   20:  invokevirtual   #5; //Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;   23:  pop   24:  iinc    3, 1   27:  goto    10   30:  aload_2   31:  invokevirtual   #6; //Method java/lang/StringBuilder.toString:()Ljava/lang/String;   34:  areturn}

拣一些关键步骤说一下，
我只是好奇，感谢。

[解决办法]
反编译是一种技术。在没有源码的情况下，它只会你要看的类的大概的方法属性反编译过来，
不会太具体，就是这样的，你大致了解一下类的作用大概就知道啦
[解决办法]
楼主参考这个帖子：
http://www.iteye.com/topic/779102