105_容器_Map和HashMap的基本用法_HashMap和HashTable的区别

Map的基本用法

• HashMap线程不安全效率高
• HashTable线程安全效率低

import java.util.HashMap;import java.util.Map;/** * 测试Map的基本用法 * @author Administrator */public class TestMap {    public static void main(String[] args) {        Map map = new HashMap();        map.put("高琪", new Wife("张曼玉"));        map.put("高琪", new Wife("张小玉"));        map.put("张三", new Wife("杨幂"));        Wife w = (Wife) map.get("高琪");//      map.remove("高琪");//      map.containsKey("张三");        System.out.println(w.name);         }}class Wife {    String name;    public Wife(String name){        this.name  = name;    }}