java迭代map

java迭代map：

 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Map.Entry;

 public class TestMap {
     /**
      * @param args
      */
     public static void main(String[] args) {
         // TODO Auto-generated method stub
         Map m = new HashMap();
         m.put("sb", "s");
         m.put("bs", "b");
         Iterator<Entry<String, String>> it = m.entrySet().iterator();
          while (it.hasNext()) {
              Map.Entry<String, String> entry =  it.next();
              String key = entry.getKey();
              String value = entry.getValue();
              System.out.println("key = " + key + "; value = " + value);
          }
     }
 }