遍历 Map

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

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

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);
              }
      }
}