1 int []num=new int[1001]; 2   FileReader fr = new FileReader("1.txt"); 3   BufferedReader br = new BufferedReader(fr); 4  5 String str; 6   StringBuilder sb = new StringBuilder(); 7   while((str=br.readLine())!=null) 8   { 9    sb.append(str);10   }11   String st=sb.toString();12    int sum=0,mynum;13    for(int i=0;i

乍看 很麻烦！