动态绑定和多态

最新推荐文章于 2022-04-23 11:48:35 发布

原创最新推荐文章于 2022-04-23 11:48:35 发布 · 275 阅读

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#string #class #c

class Animal {
private String name;
Animal(String name) {this.name = name;}
public void enjoy(){
    System.out.println("叫声......");
}
}
class Cat extends Animal {
private String eyesColor;
Cat(String n,String c) {super(n); eyesColor = c;}

public void enjoy() {
    System.out.println("猫叫声......");
}
}
class Dog extends Animal {
private String furColor;
Dog(String n,String c) {super(n); furColor = c;}

public void enjoy() {
    System.out.println("狗叫声......");
}
}
class Bird extends Animal {
private String feather;
Bird (String n ,String c) {
  super (n);feather = c;
}
public void enjoy () {
  System.out.println ("鸟叫声....");
}
}
class Lady {
    private String name;
    private Animal pet;
    Lady(String name,Animal pet) {
        this.name = name; this.pet = pet;
    }
    public void myPetEnjoy(){pet.enjoy();}
}
public class Test {
    public static void main(String args[]){
        Cat c = new Cat("catname","blue");
        Dog d = new Dog("dogname","black");
        Bird b = new Bird ("birdname","red");
        Lady l1 = new Lady("l1",c);
        Lady l2 = new Lady("l2",d);
        Lady l3 = new Lady ("l3",b);
        l1.myPetEnjoy();
        l2.myPetEnjoy();
        l3.myPetEnjoy();
   }
}