冒泡程序编译成功运行不了，大家帮忙，谢谢

public class bubblesort
{
    public static void main(String []args)
    {
        int a[] = {21, 9, 45, 17, 33, 72, 50, 12, 41, 39};
        int i;
        int j;
        int temp;
        int k;
       
        for (i=a.length; --i>=0;)
        {
            for (j=0; j<i; j++)
            {
                if (a[j] > a[j+i])
                {
                    temp = a[j];
                    a[j] = a[j +1];
                    a[j +1] = temp;
                }
            }
        }
        for (k=0; k<a.length; k++)
        {
            System.out.println("a["+ k +"]: " + a[k]);
        }
    }
}

 
 运行时显示：

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10
        at bubblesort.main(bubblesort.java:15)

[ 本帖最后由 羲和 于 2011-11-12 19:37 编辑 ]

package org.Myp2;

public class BubbLesor {

        public static void main(String[] args) {
        int a[] = {21, 9, 45, 17, 33, 72, 50, 12, 41, 39};
        int i;
        int j;
        int temp;
        int k;
      
        for (i=a.length-1;i>=0;i--)
        {
            for (j=0; j<i; j++)
            {
                if (a[j] < a[j+1])
                {
                    temp = a[j];
                    a[j] = a[j +1];
                    a[j +1] = temp;
                }
            }
        }
        for (k=0; k<a.length; k++)
        {
            System.out.println("a["+ k +"]: " + a[k]);
        }

    }

}
细心一点哦

public static void main(String []args)
    {
        int a[] = {21, 9, 45, 17, 33, 72, 50, 12, 41, 39};
        int i;
        int j;
        int temp;
        int k;
      
        for (i=a.length; --i>=0;)     这里错了。呵呵  --i>=0 是什么哇
        {

恩，谢了

ArrayIndexOutOfBoundsException 数组超出异常!!!