Java猫狗案例多态版

abstract class  Animal2{
    private String name;
    private  int age;

    public Animal2(){}

    public Animal2(String name, int age) {
        this.name=name;
        this.age=age;

    }

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public abstract void eat();
}


 class dog1 extends Animal2{
        public dog1(){
            super();

        }
        public dog1(String name,int age){
            super(name,age);
        }
        public void eat(){
            System.out.println("eat dog");
        }
}

class cat1 extends Animal2{
    public cat1(){}
    public cat1(String name,int age){
        super(name,age);
    }
    public void eat(){
        System.out.println("eat cat");
    }
}

public class duotai_biduan {
    public static void main(String[] args) {

        //方法一
        dog1 d = new dog1();
        d.setAge(19);
        d.setName("旺财");
        System.out.println(d.getName()+" "+d.getAge());
        System.out.println("-------------------------");

        //method 2
        dog1 d2 = new dog1("旺财" ,19);
        System.out.println(d2.getName()+" "+d2.getAge());
        System.out.println("-------------------------");
        //方法三
        Animal2 a= new dog1();
        a.setName("狗东西");
        a.setAge(19);
        System.out.println(a.getName()+" "+a.getAge());
        System.out.println("-------------------------");
        //方法四
        Animal2 a2= new dog1("狗东西",19);
        System.out.println(a2.getName()+" "+a2.getAge());




    }
}