Java 排序算法实现

package test;

import java.util.Scanner;

public class JavaSort {

	public static void quickSort(int a[], int left, int right) {
if (a == null || a.length == 0)
return;
if (left >= right)
return; int i = left;
int j = right; int key = a[left]; while (i < j) {
while (i < j && key <= a[j]) {
j--;
}
a[i] = a[j]; while (i < j && key >= a[i]) {
i++;
}
a[j] = a[i];
} a[i] = key;
quickSort(a, left, i - 1);
quickSort(a, i + 1, right);
} public static void InsertSort(int[] a) {
if (a == null || a.length == 0)
return;
int i, j, key; for (i = 1; i < a.length; i++) {
key = a[i];
j = i - 1;
while (j >= 0 && a[j] > key) {
a[j + 1] = a[j];
j--;
}
a[j + 1] = key;
}
} public static void BubbleSort(int[] a) {
if (a == null || a.length == 0)
return;
int i, j;
for (i = 0; i < a.length; i++) {
for (j = a.length - 2; j >= i; j--) {
if (a[j] > a[j + 1]) {
a[j] = a[j + 1] ^ a[j];
a[j + 1] = a[j + 1] ^ a[j];
a[j] = a[j + 1] ^ a[j];
}
}
}
} public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String line = sc.nextLine();
String[] strs = line.split(",");
int nums[] = new int[strs.length];
int i = 0; for (String s : strs) {
nums[i++] = Integer.parseInt(s);
} System.out.println("quick sort");
quickSort(nums, 0, nums.length - 1); for (int j : nums) {
System.out.println(j);
} System.out.println("insert sort");
InsertSort(nums);
for (int j : nums) {
System.out.println(j);
} System.out.println("bubble sort");
BubbleSort(nums);
for (int j : nums) {
System.out.println(j);
} sc.close();
} }
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