递归版冒泡排序

/** * @param args * @throws IOException */public static void main(String[] args) throws IOException {int[] a = new int[] { 2, 4, 1, 9, 5, 3 };sort(a, a.length);System.out.println(Arrays.toString(a));}static void sort(int[] a, int length) {if (length < 2)return;for (int i = 0; i < length - 1; i++) {if (a[i] < a[i + 1]) {a[i] ^= a[i + 1];a[i + 1] ^= a[i];a[i] ^= a[i + 1];}}sort(a, length - 1);}