[Java] 接口-02

package com.bjsxt.chap03;

public interface Valuable {
    public double getMoney();
}

interface Protectable {
    public void beProtected();
}

interface A extends Protectable {
    void m();
    // void getMoney();
}

abstract class Animals {
    private String name;
    
    abstract void enjoy();
}

class GoldenMonkey extends Animals implements Valuable, Protectable {
    public double getMoney() {
        return 10000;
    }
    
    public void beProtected() {
        System.out.println("live in the room");
    }
    
    public void enjoy() {
        
    }
    
    public void test() {
        Valuable v = new GoldenMonkey();
        v.getMoney();
        Protectable p = (Protectable)v;
        p.beProtected();
    }
}

class Hen implements A  {
    public void m() {}
    public void beProtected() {}
    public double getMoney() {
        return 1.0;
    }
    // public void getMoney() {} // 不常见，怪异的问题

}