Java program to create a HashMap to store Key/Value pair

Java example to create a HashMap to store Key/Value pair.
Submitted by Nidhi, on June 10, 2022

Problem statement

In this program, we will create a collection of key/value pair information using the HashMap collection and print the created HashMap.

Java program to create a HashMap to store Key/Value pair

The source code to create a HashMap to store the Key/Value pair is given below. The given program is compiled and executed successfully.

// Java program to create a HashMap to 
// store Key/Value pair

import java.util.*;

public class Main {
  public static void main(String[] args) {
    HashMap < Integer, String > emp = new HashMap < > ();

    emp.put(101, "Amit");
    emp.put(102, "Arun");
    emp.put(103, "Akas");
    emp.put(104, "Ram");
    emp.put(105, "Mohan");

    System.out.println(emp);
  }
}

Output

{101=Amit, 102=Arun, 103=Akas, 104=Ram, 105=Mohan}

Explanation

In the above program, we imported the "java.util.*" package to use the HashMap class. Here, we created a public class Main.

The Main class contains a main() method. The main() method is the entry point for the program. And, created an object of the HashMap class and store the employee information using the put() method. After that, we printed the created hashMap.