JavaOOP 实现多态案列

最新推荐文章于 2020-07-07 20:28:13 发布

原创最新推荐文章于 2020-07-07 20:28:13 发布 · 416 阅读

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CC 4.0 BY-SA版权

本文通过Java代码展示了面向对象编程中继承与多态的概念。定义了宠物基类及猫、狗、企鹅等派生类，通过实例演示不同宠物的行为特性。

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package javaOOP;

public class Cat extends Pet {
    public void eat() {
    	System.out.println("猫猫在吃猫粮");
    }
    public void  playqiu(){
    	System.out.println("猫猫在玩球");
    }
}
package javaOOP;

public class Dog  extends Pet{
   public void eat(){
	   System.out.println("狗狗在吃狗粮");
   }
   public void  feipan() {
	System.out.println("狗狗在玩飞盘");
}
}
package javaOOP;

public class Master {
    public void eat(Pet pet)
    {
    	pet.eat();
    }
    public Pet  getPet(int type){
    	Pet pet=null;
    	if (type==1) {
			pet=new Dog();
		}else if (type==2) {
			pet=new Penguin();
		}else if (type==3) {
			pet=new Cat();
		}
    	return pet;
    }
    public void  play(Pet pet) {
		if (pet instanceof Dog) {
			Dog dog=(Dog) pet;
			dog.feipan();
		}else if (pet instanceof Cat) {
			Cat cat =(Cat) pet;
			cat.playqiu();
		}
	}
}
package javaOOP;

public class Penguin  extends Pet{
   public void eat() {
	System.out.println("企鹅在吃东西");
}
}
/**
 * 
 */
package javaOOP;

/**
 * @author Administrator
 *
 */
public class Pet {
    public void eat()
    {
    	System.out.println("父类在吃东西");
    }
}
package javaOOP;

import java.util.Scanner;

public class Test {

	public static void main(String[] args) {
//		Dog dog=new Dog();
//		//dog.eat();
//        Penguin pen=new Penguin();
//       // pen.eat();
//        Cat cat=new Cat();
//        
//        Master master=new Master();
//        master.eat(dog);
//        master.eat(pen);
//        master.eat(cat);
        
//		
//        System.out.println("请选择要购买的宠物(1.狗狗2.企鹅3.猫)");
//        Scanner input=new Scanner(System.in);
//        int xz=input.nextInt();
        boolean flag=false;
//        Master master2=new Master();
//        Pet pets;
        do {
        	 System.out.println("请选择要购买的宠物(1.狗狗2.企鹅3.猫)");
             Scanner input=new Scanner(System.in);
             int xz=input.nextInt();
           
             Master master2=new Master();
             Pet pets;
        	switch (xz) {
			case 1:
			 pets=  master2.getPet(xz);
			 pets.eat();
				continue;
			case 2:
				pets=   master2.getPet(xz);
				 pets.eat();
				 continue;
			case 3:
				pets=   master2.getPet(xz);
				 pets.eat();
				break;
			}

        	 
		} while (flag);

	}

}