mymap.java

QQ游戏大厅

import java.util.*;
/**
 * @author  yeeku.H.lee [e-mail]
 * @version  1.0
 * <br>Copyright (C), 2005-2008, yeeku.H.Lee
 * <br>This program is protected by copyright laws.
 * <br>Program Name:
 * <br>Date: 
 */
public class MyMap<K,V> extends Hashtable<K,V>
{	
	public void removeByValue(Object value) 
	{
		for (Object key : keySet())
		{
			if (get(key) == value)
			{
				remove(key);
				return ;
			}
		}
	}

	//V是一个数据类型占位符，非常类似于形参。
	public Set<V> valueSet() 
	{
		Set<V> result = new HashSet<V>();
		//
		for (K key : keySet())
		{
			result.add(get(key));
		}
		return result;
	}
}