Java OCA OCP Practice Question 1301

import java.util.Collection;
import java.util.Iterator;
import java.util.TreeMap;

class Question {/*from w ww .  j a v a2  s  . co  m*/
   public static void main(String args[]) {
      TreeMap map = new TreeMap();
      map.put("one", "1");
      map.put("two", "2");
      map.put("three", "3");
      displayMap(map);
   }

   static void displayMap(TreeMap map) {
      Collection c = map.entrySet();
      Iterator i = c.iterator();
      while (i.hasNext()) {
         Object o = i.next();
         System.out.print(o.toString());
      }
   }

}