作业-继承5

Posted 2020-08-09

编写一个Animal类，具有属性：种类；具有功能：吃、睡。定义其子类Fish

和Dog，定义主类E，在其main方法中分别创建其对象并测试对象的特性。

package T092205;

public class Animal {
    private String zhonglei;
    public String getZhonglei() {
        return zhonglei;
    }
    public void setZhonglei(String zhonglei) {
        this.zhonglei = zhonglei;
    }
    public void eat(){
        System.out.println("我需要觅食！");
    }
    public void sleep(){
        System.out.println("我需要睡觉！");
    }
    public void getInfo(){
        System.out.println(" 我的种类是："+getZhonglei());
    }
}





package T092205;

public class Fish extends Animal {
    public void speak(){
        System.out.println("我是"+getZhonglei());
    }
    public void eat(){
        System.out.println("我吃小鱼");
    }
}




package T092205;

public class Dog extends Animal {
    public void speak(){
        System.out.println("我是"+getZhonglei());
    }
    public void eat(){
        System.out.println("我吃狗粮");
    }
}




package T092205;

public class E {

    public static void main(String[] args) {
        Fish a=new Fish();
        a.setZhonglei("鱼");
        a.getInfo();
        a.eat();
        a.sleep();
        if(a instanceof Fish){
            Fish f=(Fish)a;
            f.setZhonglei("鱼");
            f.eat();
            f.getInfo();
        }
        else{
            System.out.println("类型不符！");
        }
        Dog d = new Dog();
        d.setZhonglei("狗");
        d.getInfo();
        Animal aa=(Dog)d;
        aa.eat();
        aa.sleep();
    }
}