How to write quick sort in java?

Here is a sample code for implementing quick sort in Java: public class QuickSort { public static void main(String[] args) { int[] array = {10, 7, 8, 9, 1, 5}; quickSort(array, 0 , array.length-1); for (int i : array) { System.out.print(i); System.out.print(" "); } } public static void quickSort(int[] ar