Java Collection Tutorial - Java TreeMap.navigableKeySet()


TreeMap.navigableKeySet() has the following syntax.

public NavigableSet<K> navigableKeySet() 


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

//from  www .ja va 2s  .  co  m
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");
      // getting navigable key set 
      System.out.println("Checking key set value");
      System.out.println("Value is: "+ treemap.navigableKeySet());

The code above generates the following result.