Java Program to Demonstrate HashMap

import java.util.HashMap;

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

        // Add elements
        languages.put(1, "Java");
        languages.put(2, "Python");
        languages.put(3, "JavaScript");
        System.out.println("HashMap: " + languages);

        // Access element
        String value = languages.get(1);
        System.out.println("Value at index 1: " + value);

        // Remove element
        languages.remove(2);
        System.out.println("Removed value at index 2");
        System.out.println("Updated HashMap: " + languages);
    }
}

HashMap: {1=Java, 2=Python, 3=JavaScript}
Value at index 1: Java
Removed value at index 2
Updated HashMap: {1=Java, 3=JavaScript}