Thread: 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.

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.