Thread: Parsing input from a file using Scanner

I'm sorry if the thread title is misleading I solved my initial problem but ran into another one. I'm having some kind of weird problem reading input from a file. It says that my scanner object I'm using to hold an item of information isn't initialized, when I do try to initialize it, it says error variable already initialized. I'm using the scanner to read input from a file whose contents are this

10
150.4
88.4
-3.14
499.4
799.4
1299.8
0
1900.2
901.7
4444.4

This is my program

import java.util.*;
import java.io.*;
 
public class QudratullahMommandi_3_07
{
 
  Toolkit_General toolKit = new Toolkit_General();
 
  public static void main (String[]args)throws IOException
  {
 
 
  double rentalCost = 0;
  double mileage;
  int controlVar;
  String inputFile = "QudratullahMommandi_3_07_Output.txt";
 
 
   SummaryStatement();
   File file = new File(inputFile);
   Scanner inputRead = new Scanner(file);
 
 
 
   TableHeading();
 
   controlVar = inputRead.nextInt();
 
 
   for (int index = 0; index < controlVar; index++);
    { 
 
      String holder = inputRead.nextLine();
      String holder2 = holder2.trim();
      mileage = Double.parseDouble(holder2);
 
      if (mileage <=0)
      { 
       System.out.println("*****");
      }
      else if (mileage < 400)
      { 
       rentalCost = mileage*.18;
      }
      else if (mileage < 900)
      { 
       rentalCost = 65.00 + (.15 * (mileage-400));
      }
      else if (mileage < 1300)
      { 
       rentalCost = 115.00 + (.12 * (mileage-800));
      }
      else if (mileage < 1900)
      {
        rentalCost = 140.00 + (.10 * (mileage-1200));
      }
      else if (mileage < 2600)
      {
        rentalCost = 165.00 + (.08 * (mileage-1800));
      }
      else if (mileage >= 2600)
      { 
       rentalCost = 195.00 + (.06 * (mileage-2500));
      }
 
      System.out.println(rentalCost);
 
     }// end for loop
 
 
 
  }// end main
 
 
 
 
  public static void SummaryStatement()
  { 
      System.out.println("This program reads a list of values representing number of miles"
      + " driven by individuals.\n" + "It will output the dollar amount their rental cars cost.");   
  }// end SummaryStatement
 
 
  public static void TableHeading()
  { 
      System.out.println();
      System.out.println("Number of miles traveled on the left as well as amount reimbursed on the right");
      System.out.println("------------------------------------------------");
      System.out.println("Miles Driven" + "                   " + "Amount reimbursed");
  }
 
 }// end class

This is the error message


QudratullahMommandi_3_07.java:34: error: variable holder2 might not have been initialized
String holder2 = holder2.trim();
^
1 error

----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.