java多态

多态"/>

java多态

猫类（子类）

public class Cat extends Pet{private String gender;public String getgender() {return gender;}public void setgender(String gender) {this.gender = gender;}@Overridepublic void showInfo() {System.out.println("名：" + super.getName());System.out.println("健康值：" + super.getHealth());System.out.println("亲密度：" + super.getLove());System.out.println("性别：" + gender);}public Cat() {super();}public Cat(String gender, String name, int health, int love) {super(name, health, love);this.setgender(gender);}}

 狗类（子类）

public class Dog extends Pet{private String breed;public String getBreed() {return breed;}public void setBreed(String breed) {this.breed = breed;}public Dog() {super();}public Dog(String name, int health, int love, String breed) {super(name, health, love);this.breed = breed;}@Overridepublic void showInfo() {super.showInfo();System.out.println("品种：" + breed);}public Dog(String name, int health, int love) {this(name, health, love, null);}
}

宠物类（父类）

public class Pet {private String name;private int health;private int love;public String getName() {return name;}public void setName(String name) {this.name = name;}public int getHealth() {return health;}public void setHealth(int health) {if (health < 0 || health > 100) {System.out.println("您输入有误！已设置为默认值！");health = 60;}this.health = health;}public int getLove() {return love;}public void setLove(int love) {if (love < 0 || love > 100) {System.out.println("您输入有误！已设置为默认值！");love = 60;}this.love = love;}public void showInfo() {System.out.println("名：" + name);System.out.println("健康值：" + health);System.out.println("亲密度：" + love);}public Pet() {super();}public Pet(String name, int health, int love) {super();this.setHealth(health);this.setName(name);this.setLove(love);}}

测试类

public class Demo02 {private static Pet[] petArr = new Pet[4];static {petArr[0] = new Dog("小花", 88, 88, "柴犬");petArr[1] = new Dog("大花", 88, 77, "拉布拉多");petArr[2] = new Cat("公", "小猫", 77, 77);petArr[3] = new Cat("母", "大猫", 77, 66);}public static void main(String[] args) {Scanner input = new Scanner(System.in);System.out.println("欢迎来到宠物店");String breed = null;String gender = null;while (true) {System.out.println("请选择：1.狗2.猫");String choice = input.next();switch (choice) {case "1":System.out.println("请输入狗的品种：1.柴犬2.拉布拉多");breed = input.nextInt() == 1 ? "柴犬" : "拉布拉多";break;case "2":System.out.println("请输入猫的性别：1.公2.母");gender = input.nextInt() == 1 ? "公" : "母";break;default:	System.out.println("输入错误！");break;}break;}Demo02 demo02 = new Demo02();Pet pet = demo02.getPet(breed, gender);if (pet != null) {pet.showInfo();return;}System.out.println("对不起！没有您找的宠物！");}// 得到宠物（满足条件的话返回这个宠物）public Pet getPet(String breed, String gender) {for (Pet pet : petArr) {if (pet instanceof Dog) {Dog dog = (Dog)pet;if (dog.getBreed().equals(breed)) {return dog;}} else if (pet instanceof Cat) {Cat cat = (Cat)pet;if (cat.getgender().equals(gender)) {return cat;}} }return null;}
}