Javap反編譯class文件

public class Pair {
    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;
    }

}

編譯生成Pair.class文件之後，執行javap -c -s Pair

D:\webspace\JavaNew\src\it\it>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;