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<k;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();
    }
}


作者：​​火星十一郎​​

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