宠物类例题

public class Person {
     private String name;
     private Pet pet;

     public Person() {}
     public Person(String name,Pet pet){
         this.name=name;
         this.pet=pet;
     }
     public void petHappy(){
         pet.scream();
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }

}

public abstract class Pet {
    private String pname;

    public Pet(){}
    public Pet(String pname){
        this.pname = pname;
    }
    public abstract void scream();/*{
        System.out.println("宠物的叫声");
    }*/

    public String getPname() {
        return pname;
    }

    public void setPname(String pname) {
        this.pname = pname;
    }
}

public class Tiger extends Pet{
    public String fur;

    public Tiger(String fur,String name) {
        super(name);
        this.fur = fur;
    }

    public Tiger() {
        super();

    }

    @Override
    public void scream() {
        System.out.println("这是一只老虎的叫声");
    }

    public String getFur() {
        return fur;
    }

    public void setFur(String fur) {
        this.fur = fur;
    }

}

public class Main {
    public static void main(String[] args){
        Tiger t1 =new Tiger();
        Rabbit t2 = new Rabbit();

        Person p1 = new Person("小明",t1);
        Person p2 = new Person("小红",t2);
        p1.petHappy();
        p2.petHappy();
    }
}