Java TreeMap.comparator()

public Comparator <? super K> comparator()

import java.util.Comparator;
import java.util.NavigableMap;
import java.util.TreeMap;
/*from  w w  w. j a va 2  s  .  c om*/
public class Main {
   public static void main(String[] args) {
      
      NavigableMap<Integer, String>  treemap = new TreeMap<Integer, String> ();
      
      // populating tree map
      treemap.put(2, "two");
      treemap.put(1, "one");
      treemap.put(3, "three");
      treemap.put(6, "six");
      treemap.put(5, "from java2s.com");
      
      // using comparator
      Comparator comp = treemap.comparator();
      
      System.out.println("Following natural ordering");
      System.out.println("Comparator value: "+ comp);     
   }    
}