2019年1月21日 面向对象——>多态
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作业一：
创建宠物父类：编写代码如下
package com.zuoye2; public abstract class Pet { private String name; private int love; private int health; public Pet() { } public Pet(String name, int love, int health) { this.name = name; this.love = love; this.health = health; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getLove() { return love; } public void setLove(int love) { if(love<0||love>100){ System.out.println("健康值有误，取默认值。。。"); love = 60; } this.love = love; } public int getHealth() { return health; } public void setHealth(int health) { if(health<0||health>100){ System.out.println("健康值有误，取默认值。。。"); health = 60; } this.health = health; } public abstract void showInfo(); public abstract void toEat(); }
创建狗狗子类：编写代码如下
package com.zuoye2;
public class Dog extends Pet {
public Dog() {
}
public Dog(String name, int love, int health) {
super(name, love, health);
}
public void showInfo(){
System.out.println("我叫"+this.getName()+"，和主人的亲密度是："+this.getLove()+"，我的健康值是："+this.getHealth());
}
public void toEat(){
if(getHealth()<100){
System.out.println("给狗狗喂食狗粮。。。。。。。。。。。");
setHealth(getHealth()+3);
}else {
System.out.println("健康值达到100时，不需要喂食。。。。");
}
}
}
创建企鹅子类：编写代码如下
package com.zuoye2;
public class Penguin extends Pet {
public Penguin() {
}
public Penguin(String name, int love, int health) {
super(name, love, health);
}
public void showInfo(){
System.out.println("我叫"+this.getName()+"，和主人的亲密度是："+this.getLove()+"，我的健康值是："+this.getHealth());
}
public void toEat(){
if(getHealth()<100){
System.out.println("给企鹅喂食小鱼。。。。。。。。。。。");
setHealth(getHealth()+5);
}else {
System.out.println("健康值达到100时，不需要喂食。。。。");
}
}
}
创建主人类：
package com.zuoye2;
public class Master {
public void feed(Pet pet){
pet.toEat();
}
}
创建测试类：
package com.zuoye2;
public class Test {
public static void main(String[] args) {
Master m = new Master();
Pet dog = new Dog("豆豆",50,50);
m.feed(dog);
dog.showInfo();
Pet pen = new Penguin("Q仔",70,100);
m.feed(pen);
pen.showInfo();
}
}
输出结果为：
给狗狗喂食狗粮。。。。。。。。。。。
我叫豆豆，和主人的亲密度是：50，我的健康值是：53
健康值达到100时，不需要喂食。。。。
我叫Q仔，和主人的亲密度是：70，我的健康值是：100
作业二：
创建宠物父类：
package com.zuoye1;
public abstract class Pet {
private String name;
private int health;
private int love;
public Pet() {
}
public Pet(String name, int health, int love) {
this.name = name;
this.health = health;
this.love = love;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getHealth() {
return health;
}
public void setHealth(int health) {
this.health = health;
}
public int getLove() {
return love;
}
public void setLove(int love) {
this.love = love;
}
public abstract void adopt();
}
创建狗狗子类：
package com.zuoye1;
public class Dog extends Pet {
private String strain;
public Dog() {
}
public Dog(String name, int health, int love, String strain) {
super(name, health, love);
this.strain = strain;
}
public String getStrain() {
return strain;
}
public void setStrain(String strain) {
this.strain = strain;
}
public void adopt() {
System.out.println("狗狗被领养。。。。。。。。。。");
}
public void playball() {
System.out.println("带狗狗溜溜，并去草地玩皮球。。。。。。。。。。。");
}
}
创建企鹅子类：
package com.zuoye1;
public class Penguin extends Pet {
private String sex;
public Penguin() {
}
public Penguin(String name, int health, int love, String sex) {
super(name, health, love);
this.sex = sex;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public void adopt() {
System.out.println("企鹅被领养。。。。。。。。。。");
}
public void swimming() {
System.out.println("带企鹅去游泳。。。。。。。。。。");
}
}
创建小猫子类：
package com.zuoye1;
public class Cat extends Pet {
private String colour;
public Cat() {
}
public Cat(String name, int health, int love, String colour) {
super(name, health, love);
this.colour = colour;
}
public String getColour() {
return colour;
}
public void setColour(String colour) {
this.colour = colour;
}
public void adopt() {
System.out.println("小猫被领养。。。。。。。。。。");
}
public void climb() {
System.out.println("带小猫去爬树。。。。。。。。。。。");
}
}
创建主人类：
package com.zuoye1;
public class Master {
public Pet adopt(Pet pet){
if(pet instanceof Dog){
Dog dog = (Dog)pet;
dog.adopt();
}else if(pet instanceof Cat){
Cat cat = (Cat)pet;
cat.adopt();
}else if(pet instanceof Penguin){
Penguin pen = (Penguin) pet;
pen.adopt();
}
return pet;
}
public void playWithpet(Pet pet){
if(pet instanceof Dog){
Dog dog = (Dog)pet;
dog.playball();
}else if(pet instanceof Cat){
Cat cat = (Cat)pet;
cat.climb();
}else if(pet instanceof Penguin){
Penguin pen = (Penguin) pet;
pen.swimming();
}
}
}
创建测试类：
package com.zuoye1;
public class TestMaster {
public static void main(String[] args) {
Master M = new Master();
Pet pet1 = new Cat();
Pet cat =M.adopt(pet1);
M.playWithpet(pet1);
Pet pet2 = new Dog();
Pet dog =M.adopt(pet2);
M.playWithpet(pet2);
Pet pet3 = new Penguin();
Pet pen =M.adopt(pet3);
M.playWithpet(pet3);
}
}
输出结果为：
小猫被领养。。。。。。。。。。
带小猫去爬树。。。。。。。。。。。
狗狗被领养。。。。。。。。。。
带狗狗溜溜，并去草地玩皮球。。。。。。。。。。。
企鹅被领养。。。。。。。。。。
带企鹅去游泳。。。。。。。。。。
