遍历一个Map

JDK1.5中遍历使用泛型参数的 Map

Map<String,String > map = new HashMap < String,String>();

for(Map.Entry <String,String> entry : map.entrySet()){ 
　　System.out.println(entry.getKey() + "-->" + entry.getValue()); 
}

或用Iterator

public class MyMap{ 
      public static void main(String[] args){ 
              Map map = new HashMap(); 
              map.put("1","2"); 
              map.put("2","3"); 
              Set set = map.entrySet(); 
              Iterator i = set.Iterator(); 
              while(i.hasNext){ 
                    System.out.println(i.next); 
              } 
      } 
}