设计模式——享元模式样例

Client.java:

package se;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Client {
	private static FlyweightFactory factory ;
    public static void main(String[] args)
    {
           List list1 = new ArrayList();
           factory = new FlyweightFactory();
           MonsterKind list = factory.newfactory("寒冰射手");
           list.setMonsterKind("a",list1);
           list = factory.newfactory("德玛西亚");
           list.setMonsterKind("a",list1);
           list = factory.newfactory("众星之子");
           list.setMonsterKind("a",list1);
           list = factory.newfactory("生化魔人");
           list.setMonsterKind("a",list1);
           list = factory.newfactory("生化魔人");
           list.setMonsterKind("a",list1);
           list = factory.newfactory("战争之影");
           list.setMonsterKind("b",list1);
           list = factory.newfactory("德玛西亚");
           list.setMonsterKind("b",list1);
           list = factory.newfactory("生化魔人");
           list.setMonsterKind("b",list1);
           System.out.println("a中含有英雄：");
           List list2 = list.findMonsterKind("a",list1);
           Iterator it1 = list2.iterator();
           while(it1.hasNext())
           {
                  System.out.println(" "+it1.next());
           }
           
           System.out.println("b中含有英雄：");
           List list3 = list.findMonsterKind("b",list1);
           Iterator it2 = list3.iterator();
           while(it2.hasNext())
           {
                  System.out.println(" "+it2.next());
           }
           System.out.println("英雄类型共有："+factory.getNumber()+"种");
           System.out.println("英雄总数共有：8种");
    }
}

package se;
import java.util.HashMap;
import java.util.Map;

public class FlyweightFactory {
	   private Map nameList = new HashMap();
       private static FlyweightFactory factory = new FlyweightFactory();
       public FlyweightFactory(){}
       public MonsterKind newfactory(String name)
       {
              if(nameList.containsKey(name))
              {
                     return (MonsterKind)nameList.get(name);
              }
              else{
            	  	 MonsterKind id = new MonsterKind(name);
            	     nameList.put(name,id);
                     return id;
              }
       }
       public int getNumber()
       {
              return nameList.size();
       }
}

package se;
import java.util.List;

public interface kind {
    public void setMonsterKind(String person , List list); 
    
    public List findMonsterKind(String person, List list);
}

package se;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class MonsterKind implements kind{
	  private String name ;
      public MonsterKind(String name){
          //内蕴状态     
    	  this.name = name ;
      }
      public void setMonsterKind(String person , List list)
      {
             list.add(person);
             list.add(name);
      }
      public List findMonsterKind(String person, List list)
      {
             List nameList = new ArrayList();
             Iterator it = list.iterator();
             while(it.hasNext())
             {
                    if(person.equals((String)it.next()))
                    	nameList.add(it.next());
             }
             return nameList ;
      }
}