Method swap

contents/algorithm/code/QuickSort.java:37–41

(int[] arr, int i, int j)

    }

    static void swap(int[] arr, int i, int j) {
        int temp = arr[j];
        arr[j] = arr[i];
        arr[i] = temp;
    }

    public static void main(String[] args) {
        int[] arr = { 3, 7, 6, 5, 1, 4, 2 };