package com_black.jicheng; //调试类 public class Demo { public static void main(String[] args) { //创建对象调用方法 fu c=new fu(); c.show(); zi z=new zi(); z.method(); z.show(); } } package com_black.jicheng; public class fu { public void show(){ System.out.println("show方法被调用"); } } package com_black.jicheng; public class zi extends fu{ public void method(){ System.out.println("method方法被调用"); } }