How to delete all elements from HashMap

import java.util.HashMap;
import java.util.Map;

public class HashMapDeleteAll {

public static void main(String[] args) {

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

/*
* Associates the specified value with the specified key in
this map (optional operation). If the map previously
contained a mapping for the key, the old value is
replaced by the specified value
*/
hm.put(1,”ankush”);
hm.put(2, “amit”);
hm.put(3,”shivam”);
hm.put(4,”ankit”);
hm.put(5, “yogesh”);

//print hashmap
System.out.println(“Before Clear HashMap is = “+hm);

/*
* The map will be empty after this call returns.
*/

hm.clear();

System.out.println(“After Clear HashMap is =”+hm);

}

}

OutPut:

Before Clear HashMap is = {1=ankush, 2=amit, 3=shivam, 4=ankit, 5=yogesh}

After Clear HashMap is ={}

Leave a Reply

Your email address will not be published. Required fields are marked *

14 − 11 =