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Thread: Cannot get rid of File Input error

  1. #1
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    Default Cannot get rid of File Input error

    import java.util.Scanner;
    import java.io.FileNotFoundException; 
    import java.io.FileReader;
    import java.io.IOException;
     import java.io.PrintWriter;
     
    public class CountryPopulationReverse{
     
       public static void main(String args[])throws FileNotFoundException {
     
          Scanner in = new Scanner(System.in);
          Scanner FileIn;
          FileReader inputFile;
          String population, country;
          int checkNum;
          PrintWriter output;
          boolean good = false;
     
         //Try catch for valid file goes here
         while(!good)
         {
          try
          {
          System.out.print("Input file: ");
          String inputName = in.nextLine();
          inputFile = new FileReader(inputName);
          FileIn = new  Scanner(inputFile);
          good=true;
          }catch ( FileNotFoundException e){ System.out.println("File not found."); }
         }
     
          System.out.print("Output file: ");
          String outputName = in.nextLine();
     
     
    		output = new PrintWriter(outputName);
     
          try
          {
             while(FileIn.hasNextLine())
                {
                   country = FileIn.next();
                   population = FileIn.next();
     
                   checkNum = Integer.parseInt(population);
                   if(checkNum<=5)
                       throw new BadDataException("Population (" + checkNum + ") is too low.");
                   if(checkNum>2000000000)
                      throw new BadDataException("Population (" + checkNum + ") is too high.");
     
                }
     
          } catch (BadDataException e) { System.out.println("Bad Data: " + e.getMessage());}
            catch (NumberFormatException e) { System.out.println(e.getMessage());}
     
     
       output.close();
     
       }
    }

    CountryPopulationReverse.java:40: error: variable FileIn might not have been initialized
             while(FileIn.hasNextLine())
                   ^
    1 error

    Everytime I move some code somewhere else to get rid of the error then another one pops up it is very frustrating.


  2. #2
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    Default Re: Cannot get rid of File Input error

    Please post the exact error, including the stack trace, copied and pasted from exactly as it appears at your end. Be sure it corresponds to the version of the code you've posted, or provide updated code.

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