有一组学员的成绩{99,85,82,63,60}，将它们按降序排

package inputArray;

import java.util.Arrays;
import java.util.Scanner;

public class inputArray {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int a[] = new int[6];
        a[0] = 99;
        a[1] = 85;
        a[2] = 82;
        a[3] = 63;
        a[4] = 60;
        int index = a.length;
        System.out.println("请输入成绩");
        //scanner 用法
        Scanner input = new Scanner(System.in);
        //输入整数
        int num  = input.nextInt();
    
        System.out.println("排序前");
        for (int i = 0; i < a.length; i++) {
            System.out.println(a[i]);
        }
        for (int i = 0; i < a.length; i++) {
            if (num>a[i]) {
                //index 代替i
                index = i;
                break;
            }else {
                index = 5;
            }   
        }
        //元素后移
        for (int j = a.length - 1; j > index; j--) {
            //从index开始元素后移
            a[j] = a[j-1];
        }
        //插入数据
        a[index] = num;
        System.out.println("插入的成绩是："+a[index]);
        System.out.println("插入后的成绩是");
        //对数组进行升序排序
        Arrays.sort(a);
        for (int i = 0; i < a.length; i++) {
            System.out.println(a[i]);
        }
    }

}