Java Collection Tutorial - Java TreeMap.descendingKeySet()


TreeMap.descendingKeySet() has the following syntax.

public NavigableSet <K> descendingKeySet()


In the following code shows how to use TreeMap.descendingKeySet() method.

/*from  w w  w . jav  a 2 s. c  o  m*/

import java.util.NavigableSet;
import java.util.TreeMap;

public class Main {
   public static void main(String[] args) {
      TreeMap<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");
      // putting values in navigable set
      NavigableSet nset=treemap.descendingKeySet();
      System.out.println("Checking value");
      System.out.println("Navigable set values: "+nset);

The code above generates the following result.