Receiving error when trying to run my program

Question

I am receiving the error Exception in thread "main" java.lang.NumberFormatException: For input string: "3 50" in the code below. And I am having a hard time solving it. Could anyone possibly shed some light on what it could be from? From my understanding it usually means the error is in line 3 and line 50 correct?

 package report.generator;

 import java.io.BufferedReader;
 import java.io.FileReader;
 import java.io.File;
 import java.io.FileWriter;
 import java.io.BufferedWriter;
 import java.io.IOException;

 public class ReportGenerator
 {


     public static void main(String[] args)
     {
        BufferedReader br = null;
        BufferedWriter bw = null;

        try
        {
            br = new BufferedReader(new FileReader("C:\\sprocketorders.txt"));
            String line;
            String element[] = new String[2];
            int   sum[] = new int[5];
            File file = new File ("C:\\sprocketordersreport.txt");

            while ((line = br.readLine()) != null)
            {
                element = line.split(" ");

                switch(Integer.parseInt(element[0]))
                {
                    case 1:
                        sum[0] = sum[0] + Integer.parseInt(element[1]);
                        break;
                    case 2:
                        sum[1] = sum[1] + Integer.parseInt(element[1]);
                        break;
                    case 3:
                        sum[2] = sum[2] + Integer.parseInt(element[1]);
                        break;
                    case 4:
                        sum[3] = sum[3] + Integer.parseInt(element[1]);
                        break;
                    case 5:
                        sum[4] = sum[4] + Integer.parseInt(element[1]);
                        break;
                }
            }

            if (!file.exists())
            {
                file.createNewFile();
            }

            FileWriter fw = new FileWriter(file.getAbsoluteFile());
            bw = new BufferedWriter(fw);
            bw.write("Spacely Sprockets\nTaking Sprockets into the Future\nSales Summary Report\nSprocket Number Total Quantity Sold\n");
            for(int i = 0; i < sum.length; i++)
                bw.write((i + 1) + "\t" + sum[i] + "\n");

        }
        catch (IOException e)
        {
             e.printStackTrace();

        }
        finally
        {
           try
            {
                if (br != null)
                    br.close();
                if (bw != null)
                    bw.close();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
            }
          }

      }

This program is to take an input from a text file and output the information in a report format.

EDIT: Here is the input file info. After looking at it, it looks like this may be where the problem is coming from. But I'm not entirely sure.

3 50

2 20

2 100

5 15

1 90

5 85

4 300

2 35

3 100

It's not formatting it exactly as it is in the text file. There are more spaces between the integers on the left and those on the right.

Answer 1

Integer.parseInt（）最有可能抛出该错误，因为您尝试解析的数字格式不正确，请查看您尝试从中读取的字符串，可能会发现错误，然后

Answer 2

[编辑]该问题似乎来自您的输入文件，其中包含数字的行之间有空行。