1.在第三题的进行功能扩展。

package come.job.dome;
/*** * @author 宠物类**/
public class Store {public static Animal get(int choice) {if(choice==1) { //狗狗return new Dog();}else if(choice==2) { //猫return new Cat();}else {return new Pig(); //猪}}
}
package come.job.dome;
/*** * @author 狗狗**/
public class Dog implements Animal {public void show() {System.out.println("W W!");}
}
package come.job.dome;
/*** * @author 猫**/
public class Cat implements Animal {public void show() {System.out.println("M M!");}
}
package come.job.dome;
/*** * @author 猪**/
public class Pig implements Animal{public void show() {System.out.println("猪叫");}
}
package come.job.dome;
/*** * @author 接口**/
public interface Animal {void show();
}
package come.job.dome;import java.util.Scanner;
/*** * @author 测试类**/
public class AnimalTest {public static void main(String[] args) {System.out.print("请输入要选择宠物的编号(1.狗，2.猫，3.猪)：");Scanner input = new Scanner(System.in);int choice = input.nextInt();Animal store = Store.get(choice);if(choice==1) {store.show();}else if(choice==2) {store.show();}else {store.show();}}
}

2..使用面向接口思想对电子宠物系统类结构进行重构

package bdqn.com;
/*** * @author 宠物类**/
public abstract class Pet {protected String name = "无名氏";protected int health =100;protected int love = 0;public Pet(String name) {this.name = name;}/*** 输出宠物信息*/public void print() {System.out.println("我的名字叫"+this.name+",健康值是"+this.health+",和主人的亲密度是"+this.love);}
}
package bdqn.com;
/*** * @author 狗狗类**/
public class Dog extends Pet implements Eatable,Flying{private String strain; //品种public Dog(String name,String strain) {super(name);this.strain = strain;}public void print() {super.print();System.out.println("我是一只"+this.strain);}@Overridepublic void flyDis() {// TODO Auto-generated method stubsuper.health = super.health-10;System.out.println("和狗狗玩接飞盘的游戏！狗狗健康值减10");}@Overridepublic void eat() {// TODO Auto-generated method stubsuper.health = super.health+3;System.out.println("喂狗狗吃狗粮！狗狗健康值加3");}}
package bdqn.com;
/*** * @author 企鹅类**/
public class Penguin extends Pet implements Eatable,Swimmable{private String sex;public Penguin(String name,String sex) {super(name);this.sex = sex;}public void print() {super.print();System.out.println("我的性别是："+this.sex);}@Overridepublic void swin() {// TODO Auto-generated method stubsuper.health = super.health-10;System.out.println("和企鹅玩游泳游戏！企鹅健康值减10");}@Overridepublic void eat() {// TODO Auto-generated method stubsuper.health = super.health+3;System.out.println("喂企鹅吃鱼！企鹅健康值加3");}}
package bdqn.com;
/*** 吃饭的接口* @author 接口**/
public interface Eatable {void eat(); //吃饭功能
}
package bdqn.com;
/*** 接飞盘接口* @author 接口**/
public interface Flying {void flyDis(); //接飞盘
}
package bdqn.com;
/*** 游泳的接口* @author 接口**/
public interface Swimmable {void swin(); //游泳
}
package bdqn.com;
/*** * @author 测试类**/
public class TestFeed {public static void main(String[] args) {Dog pet = new Dog("黑宝","拉布拉多犬");pet.print();pet.eat();pet.flyDis();System.out.println();Penguin pet1 = new Penguin("楠楠","Q妹");pet1.print();pet1.eat();pet1.swin();}
}