java hashMap的使用

import java.util.HashMap;

public class TestHashMap1 {
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		HashMap<Integer, String> map=new HashMap<Integer,String>();
		
		//存值  key ==>value 
		map.put(1, "张三");

		map.put(2, "李四");
		
		map.put(3, "王五");
		
		//取值
		System.out.println(map.get(1));
		
		//判断是否包含某个key
		System.out.println(map.containsKey(2));
		
		//判断是否包含某个value
		System.out.println(map.containsValue("李四"));
		
		//根据key删除
		map.remove(1);
		
		System.out.println(map);
		
		HashMap<String, String> map2=new HashMap<String,String>();
		
		map2.put("ip", "192.168.1.1");
		map2.put("browse","ie");
		map2.put("uname","sunwukong");
		
		map2.remove("ip");
		
		System.out.println(map2);
		
		
		
		
		
		
	}
}