从高到低将从命令行读取的一组数字进行降序排序。

import java.util.Arrays;

public class ExamDemo {

       public static void main(String[] args) {

              int[] a = new int[args.length];

              int j, temp, i;      

              for (i = 0; i < args.length; i++)  a[i] = Integer.parseInt(args[i]);

              for (i = 0; i < a.length - 1; i++){

                     for (j = 0; j < a.length - i - 1; j++){

                            if (a[j] < a[j + 1]) {

                                   temp = a [j];

                                   a[j] = a[j + 1];

                                   a[j + 1] = temp;

                            }

                     }

              }

              for (i = 0; i < a.length; i++)

                     System.out.print(a[i] + " ");

              System.out.println();

       }

}