IdentityHashMap clear() in Java

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

Syntax:

void java.util.IdentityHashMap.clear()

This method removes all of the mappings from this map.

Note: The map will be empty after this call returns.

Parameters: NA

Returns: NA

Exceptions: NA

Approach

Java

import java.util.IdentityHashMap;

public class IdentityHashMapclear {

    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("Map before clear: " +
                                           identityHashMap);

        identityHashMap.clear();

        System.out.println("Map after clear: " + 
                                           identityHashMap);
    }

}

Output:

Map before clear: {Java=1, Hello=2}

Map after clear: {}