预习！

接口：

接口的方法都是公共抽象方法

 

使用接口的例子：

防盗门的开门关门：

 创建一个门的类

package com.jiekou1;

public abstract class Door {
    public abstract void open();
    
    public abstract void close();
}

创建锁的接口：

package com.jiekou1;

public interface Lock {
    public void shangSuo();
    public void kaiSuo();
}

创建一个防盗门类继承门的父类

package com.jiekou1;

public class FangDaoMen extends Door implements Lock {

    @Override
    public void shangSuo() {
        // TODO Auto-generated method stub
        System.out.println("插上钥匙，想右转三圈，门上锁");
    }

    @Override
    public void kaiSuo() {
        // TODO Auto-generated method stub
        System.out.println("插上钥匙，向左转三圈，门开锁");
    }

    @Override
    public void open() {
        // TODO Auto-generated method stub
        System.out.println("开门");
    }

    @Override
    public void close() {
        // TODO Auto-generated method stub
        System.out.println("关门");
    }

测试：

package com.jiekou1;

public class Test {
    public static void main(String[] args) {
        FangDaoMen door = new FangDaoMen();
        door.close();
        door.shangSuo();
        
        door.kaiSuo();
        door.open();
    }
}

 

 

智能手机的功能：

手机类：

package com.jiekou2;

public abstract class HandSet {
    private String brand;
    private String type;
    
    public HandSet() {}
    public HandSet(String brand, String type){
        this.brand = brand;
        this.type = type;
    }    
    
    public String getBrand() {
        return brand;
    }
    public void setBrand(String brand) {
        this.brand = brand;
    }
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
    
    //手机介绍
    public void showInfo() {
        System.out.println("这是一台"+brand+type);
    }
    //收发短信
    public abstract void sendMess();
    
    //打电话
    public abstract void call();
    
}

创建一个拍照接口：

package com.jiekou2;

//拍照
public interface TakePhpto {
    void takePhotos();
}

创建一个上网接口

package com.jiekou2;

//上网
public interface NextWorKing {
    void nextWorking();
}

创建一个播放接口

package com.jiekou2;

//播放
public interface Playing {
    void playVideo(String name);
}

创建一个普通手机类继承手机类

package com.jiekou2;

//普通手机类
public class CommonPhone  extends HandSet implements Playing{

    public CommonPhone() {}
    public CommonPhone(String brand,String type) {
        super(brand,type);
    }
    
    @Override
    public void playVideo(String name) {
        // TODO Auto-generated method stub
        System.out.println("播放音频：《"+name+"》");
    }

    @Override
    public void sendMess() {
        // TODO Auto-generated method stub
        System.out.println("发送文字短信");
    }

    @Override
    public void call() {
        // TODO Auto-generated method stub
        System.out.println("语音通话");
    }

}

创建一个智能手机类继承手机类：

package com.jiekou2;

public class ZhinengPhone extends HandSet implements TakePhpto,NextWorKing,Playing {

    public ZhinengPhone() {}
    public ZhinengPhone(String brand,String type) {
        super(brand,type);
    }
    
    
    @Override
    public void playVideo(String name) {
        // TODO Auto-generated method stub
        System.out.println("播放视频《"+name+"》");
    }

    @Override
    public void nextWorking() {
        // TODO Auto-generated method stub
        System.out.println("上网");
    }

    @Override
    public void takePhotos() {
        // TODO Auto-generated method stub
        System.out.println("拍照");
    }

    @Override
    public void sendMess() {
        // TODO Auto-generated method stub
        System.out.println("发送文字+图片+视频的信息");
    }

    @Override
    public void call() {
        // TODO Auto-generated method stub
        System.out.println("视频通话");
    }

}

测试：

package com.jiekou2;

public class Test {
    public static void main(String[] args) {
        CommonPhone common = new CommonPhone("诺基亚" ,"g110");
        common.call();
        common.sendMess();
        common.playVideo("钞票");
        common.showInfo();
        
        
        System.out.println("**********************************");
        ZhinengPhone zhi = new ZhinengPhone("华为" ,"p20");
        zhi.call();
        zhi.sendMess();
        zhi.playVideo("知否，知否");
        zhi.nextWorking();
        zhi.takePhotos();
        zhi.showInfo();
    }
}