Java实验项目三——宠物商店

Program：宠物商店的设计（继承，接口，线性线性表）

Description：本题未实现图形用户界面，项目结构描述如下：

classes.Pet：定义宠物接口，只要实现该接口的宠物类，都可存储进宠物商店

　　　　　　（本例定义的接口为标识接口，未定义任何方法，只用于标识）

classes.PetShop：宠物商店类,采用了单例设计模式

classes.entity.Dog：宠物狗类，实现了Pet接口

classes.entity.Cat：宠物猫类，实现了Pet接口

main.TestDemo：测试类

classes.Pet

 1 /*
 2  * Description:定义宠物标识接口，只要是实现此接口的类都为宠物类，都可放进宠物商店
 3  *
 4  * Written By:Cai
 5  *
 6  * Date Written:2017-10-18
 7  *
 8  * */
 9
10
11 package classes;
12
13 public interface Pet {
14
15 }

classes.PetShop

 1 /*
 2  * Description:定义宠物商店,采用单例设计模式
 3  *
 4  * Written By:Cai
 5  *
 6  * Date Written:2017-10-18
 7  *
 8  * */
 9
10
11 package classes;
12
13 import java.util.Iterator;
14 import java.util.List;
15 import java.util.ArrayList;
16
17 public class PetShop {
18
19     private List<Pet> pets = new ArrayList<Pet>();     //存取宠物
20     private static PetShop instance = null;            //声明私有对象
21
22     //定义私有构造方法
23     private PetShop() {    }
24
25     //取得宠物商店的实例
26     public static PetShop getInstance() {
27
28         if( PetShop.instance == null ) {
29
30             PetShop.instance = new PetShop();
31         }
32         return PetShop.instance;
33     }
34
35     //取得宠物的数量
36     public int getCount() {
37
38         return this.pets.size();
39     }
40
41     //添加宠物
42     public void add(Pet pet) {
43
44         if( pet != null ) {
45
46             this.pets.add(pet);
47         }
48     }
49
50     //打印所有宠物
51
52     public void displayInfo() {
53
54         Iterator<Pet> ite = this.pets.iterator();
55         while( ite.hasNext() ) {
56
57             System.out.println( ite.next() );
58         }
59     }
60
61 }

classes.entity.Dog

 1 /*
 2  * Description:定义宠物狗类
 3  *
 4  * Written By:Cai
 5  *
 6  * Date Written:2017-10-18
 7  *
 8  * */
 9
10 package classes.entity;
11
12 import classes.Pet;
13
14 public class Dog implements Pet {
15
16     private String name;
17     private String color;
18     private int age;
19
20     //定义构造方法
21
22     public Dog() {}
23
24     public Dog(String name, String color, int age) {
25
26         super();
27         this.name = name;
28         this.color = color;
29         this.age = age;
30     }
31
32
33     //定义setter()和getter()方法
34
35     public String getName() {
36         return name;
37     }
38
39     public void setName(String name) {
40         this.name = name;
41     }
42
43     public String getColor() {
44         return color;
45     }
46
47     public void setColor(String color) {
48         this.color = color;
49     }
50
51     public int getAge() {
52         return age;
53     }
54
55     public void setAge(int age) {
56         this.age = age;
57     }
58
59
60     //覆写toString()方法
61     @Override
62     public String toString() {
63         return "Dog [name=" + name + ", color=" + color + ", age=" + age + "]";
64     }
65
66 }

classes.entity.Cat

 1 /*
 2  * Description:定义宠物猫类
 3  *
 4  * Written By:Cai
 5  *
 6  * Date Written:2017-10-18
 7  *
 8  * */
 9
10 package classes.entity;
11
12 import classes.Pet;
13
14 public class Cat implements Pet {
15
16     private String name;
17     private String color;
18     private int age;
19
20     //定义构造方法
21
22     public Cat() {}
23
24     public Cat(String name, String color, int age) {
25
26         super();
27         this.name = name;
28         this.color = color;
29         this.age = age;
30     }
31
32
33     //定义setter()和getter()方法
34
35     public String getName() {
36         return name;
37     }
38
39     public void setName(String name) {
40         this.name = name;
41     }
42
43     public String getColor() {
44         return color;
45     }
46
47     public void setColor(String color) {
48         this.color = color;
49     }
50
51     public int getAge() {
52         return age;
53     }
54
55     public void setAge(int age) {
56         this.age = age;
57     }
58
59
60     //覆写toString()方法
61     @Override
62     public String toString() {
63         return "Cat [name=" + name + ", color=" + color + ", age=" + age + "]";
64     }
65
66 }

main.TestDemo

 1 /*
 2  * Description:定义测试类，测试宠物商店
 3  *
 4  * Written By:Cai
 5  *
 6  * Date Written:2017-10-18
 7  *
 8  * */
 9
10 package main;
11
12 import classes.*;
13 import classes.entity.Cat;
14 import classes.entity.Dog;
15
16 public class TestDemo {
17
18     public static void main(String args[]) {
19
20         //取得宠物商店的实例
21         PetShop shop = PetShop.getInstance();
22
23         //添加宠物
24         shop.add( new Dog("小黑","黑色",2) );
25         shop.add( new Dog("小白","白色",3) );
26         shop.add( new Cat("小喵","黄色",1) );
27         shop.add( new Cat("大喵","白色",3) );
28
29         //打印所有宠物
30         shop.displayInfo();
31
32     }
33
34 }

 1 /* *
 2  * Description:定义宠物商店,采用单例设计模式
 3  *
 4  * Written By:Cai
 5  *
 6  * Date Written:2017-10-18
 7  *
 8  */
 9
10 package classes;
11 import java.util.Iterator;
12 import java.util.List;
13 import java.util.ArrayList;
14 public class PetShop {
15     private List<Pet> pets = new ArrayList<Pet>();//存取宠物
16     private static PetShop instance = null;//声明私有对象
17     //定义私有构造方法
18     private PetShop() {}
19     //取得宠物商店的实例
20     public static PetShop getInstance() {
21         if( PetShop.instance == null ) {
22             PetShop.instance = new PetShop();
23         }
24         return PetShop.instance;
25     }
26     //取得宠物的数量
27     public int getCount() {
28         return this.pets.size();
29     }
30     //添加宠物
31     public void add(Pet pet) {
32         if( pet != null ) {
33             this.pets.add(pet);
34         }
35     }
36     //打印所有宠物
37     public void displayInfo() {
38         Iterator<Pet> ite = this.pets.iterator();
39         while( ite.hasNext() ) {
40             System.out.println( ite.next() );
41         }
42     }
43 }