In this tutorial, we will discuss the Java program to swap elements based on their positions or indices. Whether you’re a coding newbie or a pro, you’ll dig the simple step-by-step guide. This question will be asked in the Java Interview and we got you covered as below tutorials:

Steps:

1. Write a method which takes three parameters – swapElementsIndex(int[] arr, int index1, int index2)
2. Using temp variable, we will swap the value of arr[index1] and arr[index2]
3. Print the values of the array before and after the swap using Arrays.toString(arr)
4. Then call swapElementsIndex(arr,0,4) in the main method

Java Program:

package TestAutomationCentral;

import java.util.Arrays;

public class ArraySwap {
    public static void main(String[] args) {
        int[] arr = {1, 2, 3, 4, 5};
        swapElementsIndex(arr,0,4);
    }

    public static void swapElementsIndex(int[] arr, int index1, int index2){
        System.out.println("Before Swap - " + Arrays.toString(arr));
        int temp = arr[index1];
        arr[index1] = arr[index2];
        arr[index2] = temp;
        System.out.println("After Swap - " + Arrays.toString(arr));
    }

}

Output:

Before Swap - [1, 2, 3, 4, 5]
After Swap - [5, 2, 3, 4, 1]