hashMap 变量

刚才网上看到

   Map<String, String> map = new HashMap<String, String>();
   map.put("a", "李荣");
   map.put("b", "张明");
   map.put("c", "小张");
   //方法1:用entrySet()
   Iterator it=map.entrySet().iterator();
   while(it.hasNext())
   {
    Map.Entry<String, String> m=(Map.Entry<String, String>)it.next();
    System.out.println("键:"+m.getKey()+" 值:"+m.getValue());
   }
 
   //方法2:直接在循环中
   for(Map.Entry<String, String> m:map.entrySet())
   {
    System.out.println("键:"+m.getKey()+" 值:"+m.getValue());
   }