继承案例

package huawei;

public class Smart_phone {
    private String name;
    private int price;
    private String cofig;

    public void setName(String name) {
        this.name = name;
    }

    public void setPrice(int price) {
        if (price > 2000) {
            this.price = price;
        }
    }

    public void setCofig(String cofig) {
        this.cofig = cofig;
    }

    public String getName() {
        return name;
    }

    public int getPrice() {
        return price;
    }

    public String getCofig() {
        return cofig;
    }

    public void call(){
        System.out.println("打电话");
    }
    public void sendMessage(){
        System.out.println("发短信");
    }
    public void playGame(){
        System.out.println("玩游戏");
    }
    public void watchMovies(){
        System.out.println("看电影");
    }
}

1.华为手机类

2.荣耀30

package huawei;

public class Honor30 extends Smart_phone {
    String color;
    public Honor30() {
       System.out.println(" Hello Honor30");
    }

}

3.华为mate30

package huawei;

public class Huawei_mate30 extends Smart_phone{
    String color;
    public Huawei_mate30() {
        System.out.println();
    }
}

4.华为p40_pro

package huawei;

public class Huawei_p40_pro extends Smart_phone{
    String color;
    public Huawei_p40_pro() {
        System.out.println("hello p40_pro");
    }
}

5.Extends_test

package huawei;

public class Extends_test {
    public static void main(String[] args){
        Honor30 hr=new Honor30();
        hr.setName("honor30");
        hr.setCofig("kirin990");
        hr.setPrice(3999);
        hr.color="silver";
        hr.call();
        hr.sendMessage();
        hr.playGame();
        hr.watchMovies();
        System.out.println(hr.getCofig()+"	"+hr.getName()+"	"+hr.getPrice()+"	"+hr.color+"	");
    }
}