接口练习题（接口和多继承之间的关系和应用）

package com.Summer_0427.cn;

/**
 * @author Summer
 * 接口和多继承之间的关系和应用
 * 应用实例：计算机及其设备、插排与两项电和三项电的应用；
           计算机作为商品的继承
 */
interface ThreeElectronic{
    void threeService();
}

interface TwoElectronic{
    void twoService();
}
//接口的继承和多继承，实现了接口的功能合并和
interface Socket extends ThreeElectronic,TwoElectronic{
    void socketService();
}
class goods{
    private String type;
    public goods(String type) {
        this.type = type;
    }
    public String getType() {
        System.out.println(this.type+"属于家电类");
        return type;
    }
    
}

class Computer extends goods implements Socket{
    public Computer(String type) {
        super(type);
    }

    @Override
    public void threeService() {
        System.out.println("计算机本身用三项电通电");    
    }

    @Override
    public void twoService() {
        System.out.println("计算机上的外置设备用两项电通电");
        
    }

    @Override
    public void socketService() {
        System.out.println("计算机上连接的插排进行供电");
        
    }
    
}

public class TestElectronic {

    public static void main(String[] args) {
        Computer cp = new Computer("戴尔电脑");
        cp.threeService();
        cp.twoService();
        cp.socketService();
        cp.getType();
    }

}