13.使用super

Posted 2020-07-14 许先

package extendAnimal;
/**
 * 狗狗类，宠物的子类
 */
public class Dog extends Pet {
    private String strain="牧羊犬";// 品种

    //无参构造方法
    public Dog() {
        System.out.println("子类无参构造方法");
    }
    
    public Dog(String name,String strain){
        super(name);
        this.strain=strain;
        System.out.println("子类带参构造方法");
    }
    
    public String getStrain() {
        return strain;
    }

    public void setStrain(String strain) {
        this.strain = strain;
    }
    
}

package extendAnimal;
/**
 * 企鹅类，宠物的子类
 */
public class Penguin extends Pet {
    private String sex="Q仔";// 性别

    //无参构造方法
    public Penguin() {
        System.out.println("子类无参构造方法");
    }
    
    public Penguin(String name,String sex){
        super(name);
        this.sex=sex;
        System.out.println("子类带参构造方法");
    }
    
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }    
}

package extendAnimal;
/**
 * 宠物类，狗狗和企鹅的父类
 */
public class Pet {
    private String name = "无名氏";// 昵称
    private int health = 100;// 健康值
    private int love = 20;// 亲密度
    
    /**
     * 无参构造方法
     */
    public Pet() {
        System.out.println("父类无参构造方法");
    }
    /**
     * 有参构造方法
     * @param name  昵称
     */
    public Pet(String name) {
        System.out.println("父类带参构造方法");
        this.name = name;
    }
    
    public String getName() {
        return name;
    }



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



    public int getHealth() {
        return health;
    }



    public void setHealth(int health) {
        if(health<0||health>100){
            System.out.println("健康值应该在0至100之间，默认值为60。");
            this.health=60;
            return;
        }
        this.health = health;
    }



    public int getLove() {
        return love;
    }



    public void setLove(int love) {
        if(love<0||love>100){
            System.out.println("亲密度应该在0至100之间，默认值为10。");
            this.love=10;
            return;
        }
        this.love = love;
    }

    /**
     * 输出宠物信息
     */
    public void print() {
        System.out.println("宠物的自白：\n我的名字叫" + 
                this.name + "，我的健康值是" + this.health 
                + "，我和主人的亲密程度是" + this.love + "。");
    }
}

package extendAnimal;
//测试类
public class Test {
    public static void main(String[] args) {
        // 1、创建宠物对象pet并输出信息
        Pet pet = new Pet("贝贝");
        pet.print();
        /*// 2、创建狗狗对象dog并输出信息
        Dog dog = new Dog();
        dog.setName("多多");
        dog.setHealth(90);
        dog.setLove(80);
        dog.setStrain("吉娃娃");
        dog.print();
        // 3、创建企鹅对象pgn并输出信息
        Penguin pgn = new Penguin();
        pgn.setName("大黑");
        pgn.setHealth(98);
        pgn.setLove(99);
        pgn.setSex("Q妹");
        pgn.print();*/
        
        Dog dog=new Dog("多多","吉娃娃");
        dog.print();
        Penguin pgn = new Penguin("大黑","Q妹");
        dog.print();
    }
}