原型模式 - 维基百科，自由的百科全书

 /** Prototype Class **/  public class Cookie implements Cloneable {         public Object clone() throws CloneNotSupportedException     {         //In an actual implementation of this pattern you would now attach references to         //the expensive to produce parts from the copies that are held inside the prototype.         return (Cookie) super.clone();     }  }    /** Concrete Prototypes to clone **/  public class CoconutCookie extends Cookie { }    /** Client Class**/  public class CookieMachine  {      private Cookie cookie;//cookie必须是可复制的        public CookieMachine(Cookie cookie) {           this.cookie = cookie;       }       public Cookie makeCookie()     {         try         {             return (Cookie) cookie.clone();         } catch (CloneNotSupportedException e)         {             e.printStackTrace();         }         return null;     }          public static void main(String args[]){           Cookie tempCookie =  null;           Cookie prot = new CoconutCookie();           CookieMachine cm = new CookieMachine(prot); //设置原型          for(int i=0; i<100; i++)               tempCookie = cm.makeCookie();//通过复制原型返回多个cookie       }   }