Java TreeMap.ceilingKey(K key)

public K ceilingKey(K key)

/*www  .  j a  v  a 2  s. c om*/

import java.util.NavigableMap;
import java.util.TreeMap;

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");
      
      System.out.println("Ceiling key entry for 4: "+ treemap.ceilingKey(4));
      System.out.println("Ceiling key entry for 5: "+ treemap.ceilingKey(5));
      System.out.println("Ceiling key entry for 7: "+ treemap.ceilingKey(7));
   }    
}