TreeMap keySet() method in java
import java.util.TreeMap;
public class TreeMapKeySetMethodExample
{
public static void main(String[] args)
{
TreeMap<Integer, String> tm = new TreeMap<Integer, String>();
tm.put(53, "mango");
tm.put(62, "apple");
tm.put(29, "grapes");
tm.put(93, "banana");
tm.put(98, "watermelon");
System.out.println("Given TreeMap is: " + tm);
// use keySet() to get set view of keys
System.out.println("set is: " + tm.keySet());
}
}