Java Program to Delete a specific element from an Array

In this post, you will learn how to delete a specific element from an array using the Java programming language.

Algorithm

1. Start
2. Input an array arr[] of size n
3. Initialize the index to delete, Set indexToDelete to -1
4. Iterate through the array using a loop from i = 0 to i < n :

• If arr[i] == elementToDelete, then,
• Set indexToDelete = i.
• Break out of the loop (the element has been found).

5. Check if Element is Found: indexToDelete == -1, then

• Print "Element not found in the array."
• Exit the algorithm.

6. Create a new array newArray[] of size n-1.
7. Copy Elements Except the Deleted One:

• Initialize a variable k = 0 (index for newArray[]).
• Iterate through the original array arr[] using a loop from i = 0 to i < n
• If i == indexToDelete, skip this iteration
• Otherwise, copy arr[i] to newArray[k] and increment k.

8. Print the newArray[]

Java Program

In the given Java program, we have declared an array. Then, we have asked the user to provide the specific element they wish to delete. The program locates the index of the element to delete. At last, we have created a new array by excluding the specified element.

import java.util.Arrays;
import java.util.Scanner;

public class DeleteSpecificElement {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // Define the array
        int[] array = {11, 12, 14, 15, 16, 17, 18};
        System.out.println("Original Array: " + Arrays.toString(array));

        // Get the element to delete
        System.out.print("Enter the element you want to delete: ");
        int elementToDelete = scanner.nextInt();

        // Find the index of the element to delete
        int indexToDelete = -1;
        for (int i = 0; i < array.length; i++) {
            if (array[i] == elementToDelete) {
                indexToDelete = i;
                break;
            }
        }

        // If the element is found
        if (indexToDelete != -1) {
            // Create a new array with a size less than the original array
            int[] newArray = new int[array.length - 1];

            // Copy elements except the one to delete
            for (int i = 0, k = 0; i < array.length; i++) {
                if (i == indexToDelete) {
                    continue; // Skip the element to delete
                }
                newArray[k++] = array[i];
            }

            // Print the new array
            System.out.println("Array after deletion: " + Arrays.toString(newArray));
        } else {
            System.out.println("Element not found in the array.");
        }

        scanner.close();
    }
}

Output of the above code:

Original Array: [11, 12, 14, 15, 16, 17, 18]
Enter the element you want to delete: 11
Array after deletion: [12, 14, 15, 16, 17, 18]

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