1. Introduction

A HashSet is a part of the Java Collections Framework and resides in the java.util package. It represents a collection of elements where every element is unique. The remove method of HashSet is used to remove a specific element from the set. If the set contains the specified element, it is removed, and the method returns true; otherwise, it returns false.

2. Program Steps

1. Create a HashSet and add some elements to it.

2. Remove an element from the HashSet using the remove method.

3. Print the HashSet and the result of the remove method to the console.

3. Code Program

import java.util.HashSet;

public class HashSetRemove {

    public static void main(String[] args) {

        // Step 1: Create a HashSet and add some elements to it
        HashSet<String> fruits = new HashSet<>();
        fruits.add("Apple");
        fruits.add("Banana");
        fruits.add("Cherry");

        // Step 2: Remove an element from the HashSet using the remove method
        boolean isRemoved = fruits.remove("Banana");

        // Step 3: Print the HashSet and the result of the remove method
        System.out.println("HashSet after removal: " + fruits);
        System.out.println("Was Banana removed? " + isRemoved);
    }
}

Output:

HashSet after removal: [Cherry, Apple]
Was Banana removed? true

4. Step By Step Explanation

Step 1: A HashSet named fruits is created and initialized with some elements.

Step 2: The remove method is used to remove the element "Banana" from the HashSet. The method returns true indicating that the element has been successfully removed.

Step 3: The updated HashSet and the result of the remove method are printed to the console. The output confirms that the element "Banana" has been removed from the HashSet.