java子类父类的this相同吗

 

class A{
    public String TAG="TAGA";
    public String c="---C";
    public A(){
        Log.i(TAG, "A: "+this+this.TAG+this.c);
        this.funA1();

    }
    public void funA1(){
        Log.i(TAG, "funA1: ");
    }
}
class B extends A{
    public String TAG="TAGB";
    public B(){
        super();
        Log.i(TAG, "B: "+this+this.TAG+this.c);
        this.funA1();
    }

    @Override
    public void funA1() {
        Log.i(TAG, "funA1: ");
        super.funA1();
    }

    public static void main(String[] args) {
        new B();
    }
}

 

2022-02-20 19:22:19.664 13648-13764/com.example.bottomnavigationactivityapp I/TAGA: A: com.example.bottomnavigationactivityapp.B@efc6238TAGA---C
2022-02-20 19:22:19.664 13648-13764/com.example.bottomnavigationactivityapp I/TAGA: funA1:
2022-02-20 19:22:19.664 13648-13764/com.example.bottomnavigationactivityapp I/TAGB: B: com.example.bottomnavigationactivityapp.B@efc6238TAGB---C
2022-02-20 19:22:19.664 13648-13764/com.example.bottomnavigationactivityapp I/TAGB: funA1:
2022-02-20 19:22:19.664 13648-13764/com.example.bottomnavigationactivityapp I/TAGA: funA1:

---------

class A{
    public String TAG="TAGA";
    public String c="---C";
    public A(){
        System.out.println(TAG+ "\t"+"A: "+this+this.TAG+this.c);   // 1
        this.funA1();

    }
    public void funA1(){
        System.out.println(TAG+"\t"+"funA1: "); // 2
    }
}
public class B extends A{
    public String TAG="TAGB";
    public B(){
        super();
        System.out.println(TAG  +"\t"+ "B: "+this+"\t"+this.TAG+"\t"+this.c);
        this.funA1();
    }

    @Override
    public void funA1() {
        System.out.println(TAG+ "\t"+"funA1: "); // 2 被A构造方法this.funA1();调用，但是B构造方法初始化A的时候呀，A还没初始化完成，导致B的成员变量TAG还没初始化，所以 TAG 为null
        super.funA1();
    }

    public static void main(String[] args) {
        new B();
    }
}
//TAGA	A: com.java.sjq.base.classInitOrder.B@77468bd9TAGA---C
//null	funA1:
//TAGA	funA1: 
//TAGB	B: com.java.sjq.base.classInitOrder.B@77468bd9	TAGB	---C
//TAGB	funA1:
//TAGA	funA1: