将数组中的每个元素与其相邻元素互换

public class ArraySwap {
    public static void swapElements(int[] arr) {
        for (int i = 0; i < arr.length - 1; i += 2) {
            int temp = arr[i];
            arr[i] = arr[i + 1];
            arr[i + 1] = temp;
        }
    }

    public static void main(String[] args) {
        int[] arr = {1, 2, 3, 4, 5, 6};
        swapElements(arr);
        for (int num : arr) {
            System.out.print(num + " ");
        }
    }
}