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Java program to get the value based on the key from a HashMap collection

Given a HashMap collection, we have to get the value based on the key from it.
Submitted by Nidhi, on June 11, 2022

Problem statement

In this program, we will create a collection of key/value pair information using the HashMap collection. Then we will get values based on keys from HashMap using the get() method and print the result.

Source Code

The source code to get value based on the key from a HashMap collection is given below. The given program is compiled and executed successfully.

// Java program to get value based on the key 
// from a HashMap collection

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, "Akash");
    emp.put(104, "Ram");
    emp.put(105, "Mohan");

    System.out.println("Value for 101: " + emp.get(101));
    System.out.println("Value for 103: " + emp.get(103));
  }
}

Output

Value for 101: Amit
Value for 103: Akash

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. Then we get values, based on keys from the HashMap collection using the get() method and printed the result.

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