冒泡排序

package com.mycom.test;

import java.util.Arrays;

public class Maopao {

	public static int[] mp(int a[]) {
		int swap = 0;
		for (int i = 0; i < a.length; i++) {
			for (int j = i; j < a.length; j++) {
				if (a[j] < a[i]) {
					swap = a[i];
					a[i] = a[j];
					a[j] = swap;
				}
			}
		}
		return a;
	}

	public static void main(String[] args) {
		int [] a = {2,1,4,3,8,7};
		System.out.println(Arrays.toString(mp(a)));
	}

}

 通过改变“<”或“>”可以控制是由大到小，还是由小到大。