Deleting element from HashMap using built-in method remove()

 

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

public class HashMapRemove {

public static void main(String[] args) {

//Creating HashMap;

Map<Integer, String> hm = new HashMap<>();

//Putting element

hm.put(1, "Naidu");

hm.put(3, "Rohilla");

hm.put(5, "Vijay");

hm.put(2, "Rahul");

hm.put(4, "Ramakesh");

hm.put(6, "Sudeep");

//Storing null value

hm.put(null, null);

hm.remove(5);

System.out.println(hm);

hm.remove(6, "Sudeep");

System.out.println(hm);

//key and value doesn't match, no operation will be performed

hm.remove(4, "Rahul");

System.out.println(hm);

}

}