Hashtable keySet() in Java

keySet(): This method is available in java.util.Hashtable class of Java.

Syntax:

Set<K> java.util.Hashtable.keySet()

This method returns a Set view of the keys contained in this map.

Parameters: NA

Returns: a set view of the keys contained in this map.

Exceptions: NA

Approach

Java

import java.util.Hashtable;

public class HashtablekeySet {
    public static void main(String[] args) {
        Hashtable<String, Integer> hashtable = 
                    new Hashtable<String, Integer>();

        hashtable.put("Hello", 1);
        hashtable.put("World", 2);

        System.out.println(hashtable.keySet());

    }
}

Output:

[World, Hello]