ReverseArray.java

package com.suchowitzki.reversearray;

public class ReverseList {
    public static void main(String... args) {
        Character[] arr = new Character[]{'a', 'b', 'c', 'd', 'e', 'f'};
        reverse(arr);
        System.out.println(Arrays.toString(arr));

        Integer[] arr2 = new Integer[]{1, 2, 3, 4, 5};
        reverse(arr2);
        System.out.println(Arrays.toString(arr2));
    }

    public static <T> void reverse(T[] arr) {
        for (int i = 0; i < arr.length / 2; i++) {
            swap(arr, i, arr.length - i - 1);
        }
    }

    public static <T> void swap(T[] arr, int start, int end) {
        T temp = arr[start];
        arr[start] = arr[end];
        arr[end] = temp;
    }
}