package com.zb;

public class Test2 {
    static class T1{
        public T1(){
            hello();
        }
     public void hello(){};
    }
    static class T2 extends  T1{
        @Override
        public void hello() {
            System.out.println("hello world");
        }
    }

    public static void main(String[] args) {
        T2 t2 = new T2();
    }
}