IdentityHashMap keySet() in Java

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

Syntax:

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

This method returns an identity-based set view of the keys contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa.

Parameters: NA

Returns: an identity-based set view of the keys contained in this map.

Exceptions: NA

Approach

Java

import java.util.IdentityHashMap;

public class IdentityHashMapkeySet {

    public static void main(String args[]) {

        IdentityHashMap<String, Integer> identityHashMap = 
                        new IdentityHashMap<String, Integer>();

        identityHashMap.put("Java", 1);
        identityHashMap.put("Hello", 2);

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

    }

}

Output:

[Java, Hello]