Add elements to HashMap

In this post, we have seen about HashMap. In this post, we will learn how to add elements to HashMap.

We need to use method put to add the values to HashMap.

Syntax:

HashMap<key, value> hm = new HashMap<key, value>();

Example:

In this example, we will create key of integer and value of String type. Then we need to use put method to add the elements.

import java.util.HashMap;

public class HashMapEx {

	public static void  main(String[] args){
		
		HashMap<Integer,String> hm = new HashMap<Integer,String>();
		hm.put(1, "Mobile");
		hm.put(6, "TV");
		hm.put(10, "Laptop");
		hm.put(2, "Desktop");
		hm.put(15, "Tablet");
		
		System.out.println(hm);
	}
}

Output:

{1=Mobile, 2=Desktop, 6=TV, 10=Laptop, 15=Tablet}