创建型---prototype模式

 1 package com.design;
 2 import java.util.ArrayList;
 3 
 4 /**
 5  * 
 6  * @author Administrator
 7  *
 8  */
 9 class ConcretePrototype implements Cloneable { 
10     /**
11      * 成员变量
12      * namelist 测试深拷贝 
13      */
14     private ArrayList<String> nameList = new ArrayList<String>(); 
15     
16     /**
17      * 构造函数
18      */
19     public ConcretePrototype() { 
20       } 
21     
22     /**
23      * 添加name到namelist
24      * @param name
25      */
26     public void setName(String name) { 
27         this.nameList.add(name); 
28       } 
29     
30      /**
31       *  获取namelist
32       * @return
33       */
34      public ArrayList<String> getNameList() { 
35         return this.nameList; 
36       } 
37       
38      /**
39       * 覆盖Object基类中的clone()方法，并扩大该方法的访问权限，具体化返回本类型 
40       */
41      public ConcretePrototype clone() {
42          
43         ConcretePrototype self = null;   
44         try
45         {
46             self = (ConcretePrototype) super.clone();
47             ///以下这句是实现深拷贝的关键 
48             self.nameList = (ArrayList<String>) this.nameList.clone();
49         }
50         catch(CloneNotSupportedException e)
51         {
52             e.printStackTrace();
53         }
54         
55         return self;
56       } 
57 } 
58 
59 //测试类 
60 public class Test { 
61       public static void main(String[] args) { 
62         ConcretePrototype prototype = new ConcretePrototype();
63         prototype.setName("蚂蚁 ...");
64         System.out.println("prototype : " + prototype.getNameList()); 
65          
66         ///通过clone获得一个拷贝 
67         ConcretePrototype fromClone = prototype.clone(); 
68         fromClone.setName("小蚂蚁 ..."); 
69         System.out.println("fromClone : " + fromClone.getNameList());
70         System.out.println("prototype : " + prototype.getNameList()); 
71       } 
72 }