SetIteratorTreeMapExample

import java.util.*;

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

        TreeMap <Integer, String>tMap = new TreeMap<Integer, String>();
         tMap.put(1, "Sunday");
         tMap.put(2, "Monday");
         tMap.put(3, "Tuesday");
         tMap.put(4, "Wednesday");
         tMap.put(5, "Thursday");
         tMap.put(6, "Friday");
         tMap.put(7, "Saturday");

        Set s = tMap.keySet();
        System.out.println("TreeMap Set value Is " + tMap.keySet());

        Iterator itr= s.iterator();
        try {
              while(itr.hasNext()){
             System.out.println("iterator.hasnext Value Is " + tMap.get(itr.next()));
             System.out.println("tMap Value Is " + tMap.get(itr.next()));
             }
       }
       catch(Exception e){
     System.out.println("Exception Value Is " + e);
       }

       }
}

Console Answer Is :

TreeMap Set value Is [1, 2, 3, 4, 5, 6, 7]
iterator.hasnext Value Is Sunday
tMap Value Is Monday
iterator.hasnext Value Is Tuesday
tMap Value Is Wednesday
iterator.hasnext Value Is Thursday
tMap Value Is Friday
iterator.hasnext Value Is Saturday