How do I reverse an int array in Java?

Question

I am trying to reverse an int array in Java.

This method does not reverse the array.

for(int i = 0; i < validData.length; i++)
{
    int temp =          


        

Answer 1

If working with data that is more primitive (i.e. char, byte, int, etc) then you can do some fun XOR operations.

public static void reverseArray4(int[] array) {
    int len = array.length;
    for (int i = 0; i < len/2; i++) {
        array[i] = array[i] ^ array[len - i  - 1];
        array[len - i  - 1] = array[i] ^ array[len - i  - 1];
        array[i] = array[i] ^ array[len - i  - 1];
    }
}