Swap two values inside a array using Java

Java Programming Language Array in java (Article) Array in java (Program)

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To swap two values inside a Java array, you need to:

1. Create a temporary variable to hold one of the values temporarily.
2. Swap the values using this temporary variable.

Here is a simple example of how to swap two elements in a Java array:

Given Input:

Before Swap: 
10 20 30 40 50 

Expected Output:

After Swap: 
10 40 30 20 50

Program:

public class SwapExample {
    public static void main(String[] args) {
        // Sample array
        int[] arr = {10, 20, 30, 40, 50};

        // Indexes of the two elements to be swapped
        int index1 = 1; // Value 20 at index 1
        int index2 = 3; // Value 40 at index 3

        // Print the array before swapping
        System.out.println("Before Swap: ");
        for (int value : arr) {
            System.out.print(value + " ");
        }

        // Swap the two values using a temporary variable
        int temp = arr[index1];   // Store arr[index1] in temp
        arr[index1] = arr[index2]; // Replace arr[index1] with arr[index2]
        arr[index2] = temp;        // Replace arr[index2] with temp (original arr[index1])

        // Print the array after swapping
        System.out.println("\n\nAfter Swap: ");
        for (int value : arr) {
            System.out.print(value + " ");
        }
    }
}

Output:

Before Swap: 
10 20 30 40 50 

After Swap: 
10 40 30 20 50

Explanation:

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