How to Remove an Element from an Array in Java

There are several ways to remove elements from an array in Java, depending on your specific requirements and the tools and libraries you are using. Here are a few examples of methods you can use to remove array elements.

1. Using the System.arraycopy method

You can use the System.arraycopy method from the java.lang package to copy the elements of an array to a new array, excluding the element you want to remove. This method takes four arguments: the source array, the starting index of the source array, the destination array, and the starting index of the destination array. Here is an example of how you can use this method to remove an element from an array:

import java.lang.System;

int[] numbers = {1, 2, 3, 4, 5};

int[] newNumbers = new int[numbers.length - 1];

System.arraycopy(numbers, 0, newNumbers, 0, 2); // Copy elements 0 and 1
System.arraycopy(numbers, 3, newNumbers, 2, 2); // Copy elements 3 and 4

// The newNumbers array now contains {1, 2, 4, 5}

2. Using the ArrayList class

You can use the ArrayList class from the java.util package to store the elements of an array in a list, and then use the remove method to remove an element from the list. Here is an example of how you can use the ArrayList class to remove an element from an array:

import java.util.ArrayList;
import java.util.Arrays;

int[] numbers = {1, 2, 3, 4, 5};

ArrayList<Integer> list = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5));
list.remove(2); // Remove the element at index 2

int[] newNumbers = list.stream().mapToInt(i -> i).toArray();

// The newNumbers array now contains {1, 2, 4, 5}

3. Using the List interface

You can use the List interface from the java.util package to store the elements of an array in a list, and then use the remove method to remove an element from the list. Here is an example of how you can use the List interface to remove an element from an array.

import java.util.Arrays;
import java.util.List;

int[] numbers = {1, 2, 3, 4, 5};

List<Integer> list = Arrays.asList(1, 2, 3, 4, 5);
list.remove(2); // Remove the element at index 2

int[] newNumbers = list.stream().mapToInt(i -> i).toArray();

// The newNumbers array now contains {1, 2, 4, 5}

These are just a few examples of how you can remove elements from an array in Java. In fact, there are quite a few of them. I hope the options above helped you!