为了给学弟学妹讲课，我又水了一题……

1: import java.util.*;

2: import java.io.*;

3:

4: public class HDU1106

5: {

6:     public static void main(String[] args)

7:     {

8:         BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

9:         String s;

10:         while((s=br.readLine())!=null)

11:         {

12:       //去掉字符串中空格，防止useDelimiter连续读取整数出错

13:             Scanner sc = new Scanner(s.trim());

14:             int k = 0;

15:             int a[];

16:             a=new int[1001];

17:       //匹配正则表达式，5+表示匹配一个或多个5，不会产生空字符

18:             sc.useDelimiter("5+");

19:             while(sc.hasNextInt())

20:                 a[k++]=sc.nextInt();

21:             sc.close();

22:             Arrays.sort(a,0,k);

23:             for(int i=0;i

24:             {

25:                 if(i==k-1)

26:                     System.out.println(a[i]);

27:                 else

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

29:             }

30:         }

31:     }

32: }

while(sc.hasNext()) {    if(sc.hasNextInt()) {        //do sth    }else {    //直接跳过        next();    }}