import java.util.*;




public class Map2
{
   public static void main(String[] args)
   {

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


      M.put("John Doe", "Brother");
      M.put("Tom Doe", "Cousin");
      M.put("Jane Doe", "Sister");
      M.put("Todd Hall", "Neighbor");
      M.put("Ralph Smith", "Teacher");

      /* ------------------------------------------------
	 entrySet() returns a  "Set<Map.Entry<K,V>>"
	 or: a "Set" of <Map.Entry> items
         ----------------------------------------------- */
      Collection s = M.entrySet();
//    Set s = M.entrySet();

      /* ------------------------------------------------
         Get an iterator over a Set
         ----------------------------------------------- */
      Iterator iter = s.iterator();

      // -----------------------------------------
      // Shorter:
      //    Iterator iter = M.keySet().iterator();
      // -----------------------------------------

      /* -------------------------
	 Iterate over "iter"
         ------------------------- */
      while(iter.hasNext()) 
      {
         Map.Entry x;    // Help variable

         x = (Map.Entry) iter.next();		// Get next entry

         System.out.print(x.getKey() + ": ");
         System.out.println(x.getValue());
      }
      System.out.println(); 

   }

}