package com.hanqi;

public class UseCase2 {
    public void doSomething(){
        System.out.println("父类.doSomething()");
    }
    public void doAnything(){
        System.out.println("父类.doAnything()");
    }
    public static void main(String args[]){
        UseCase2 u=new sub();
        u.doSomething();
        u.doAnything();
    }
}
class sub extends UseCase2{
    public void doAnything(){
        System.out.println("子类.doAnything()");
    }
}

 

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