class C{
    public C() {
        System.out.println("C构造方法");
        this.print(); 
    }
    void print() {
        System.out.println("这是C中的this调用");
    }
}
 
class B extends C{
    public B() {
        System.out.println("B构造方法");
        this.print();
    }
    void print() {
        System.out.println("这是B中的this调用");
    }
}
class A extends B{
    public A() {
        System.out.println("A构造方法");
        this.print();
    }
    void print(){
        System.out.println("这是A中的this调用");
    }
}
 
 
public class Main {
    public static void main(String[] args) {
        A a = new A();
        System.out.println("=====================");
        B b = new A();
        System.out.println("=====================");
        C c = new A();
        System.out.println("=====================");
    }
}