Javap反编译class文件

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我是靠谱客的博主完美网络，最近开发中收集的这篇文章主要介绍Javap反编译class文件，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

public class Pair<T, U> {
    private T first;
    private U second;

    public Pair(T first, U second) {
        this.first = first;
        this.second = second;
    }

    public T getFirst() {
        return first;
    }

    public U getSecond() {
        return second;
    }

    public void setFirst(T newValue) {
        first = newValue;
    }

    public void setSecond(U newValue) {
        second = newValue;
    }

}

编译生成Pair.class文件之后，执行javap -c -s Pair

D:webspaceJavaNewsrcitit>javap -c -s Pair
Warning: Binary file Pair contains it.it.Pair
Compiled from "Pair.java"
public class it.it.Pair<T, U> {
public it.it.Pair(T, U);
    Signature: (Ljava/lang/Object;Ljava/lang/Object;)V
    Code:
       0: aload_0
       1: invokespecial #1                  // Method java/lang/Object."<init>":()V
       4: aload_0
       5: aload_1
       6: putfield      #2                  // Field first:Ljava/lang/Object;
       9: aload_0
      10: aload_2
      11: putfield      #3                  // Field second:Ljava/lang/Object;
      14: return

public T getFirst();
    Signature: ()Ljava/lang/Object;
    Code:
       0: aload_0
       1: getfield      #2                  // Field first:Ljava/lang/Object;
       4: areturn

public U getSecond();
    Signature: ()Ljava/lang/Object;
    Code:
       0: aload_0
       1: getfield      #3                  // Field second:Ljava/lang/Object;
       4: areturn

public void setFirst(T);
    Signature: (Ljava/lang/Object;)V
    Code:
       0: aload_0
       1: aload_1
       2: putfield      #2                  // Field first:Ljava/lang/Object;
       5: return

public void setSecond(U);
    Signature: (Ljava/lang/Object;)V
    Code:
       0: aload_0
       1: aload_1
       2: putfield      #3                  // Field second:Ljava/lang/Object;