Cannot resolve symbol variable

[JavaBeanie]

I'm doing something stupid again and i'm not seeing it. Ive attached the whole program and a text file in case anyone wants to try it but here's my problem:
all works fine until I try to call 'calculate' from main. I'm getting the 'cannot resolve symbol variable' and I don't understand why. This all worked when I tried it in a program by itself.

In the main method i have: calculate(dataArray);
To call:
public static void calculate( int dataArray[]){
int[] tempHolding = new int [dataArray.length];
calculate(dataArray, tempHolding, 0); // call private calculate function and pass perameters
}

private static void calculate(int dataArray[], int tempHolding[], int last){
for (int i = last; i < dataArray.length; i++){
tempHolding[i] = dataArray[i];
calculate(dataArray, tempHolding, i +1);
tempHolding[i] = 0;
}
for (int i = 0; i < tempHolding.length; i++){
if (tempHolding[i] != 0){
System.out.print (tempHolding[i] + " ");
}
System.out.println();
} //END OF RECURSIVE ADDITION

[NPH]

in main, are you sure dataArray is defined properly? Where are you creating the dataArray array?

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[JavaBeanie]

I was calling 'calculate' after closing the buffer - it I call it before I close the buffer the program runs fine. That's what I don't understand - if i've taken the data and read it into an array, why can't I close the I/O buffer?

[sjalle]

.. but thats all.
I've added a FileDialog and declared dataArray
where it is accessible for the rest of the code.

I also got rid of the static stuff; static should be used when its useful,
and the main() should only be used for creating the first (GUI) class
and invoking it.

/**
 * Module  - Recursion Lab
 *
 *
 */

import java.io.*;
import java.lang.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;

public class RecursionLab {

  public static void main(String[] args) {
    RecursionLab rL=new RecursionLab();
    rL.doTheJob();
  }
  public void doTheJob() {
    int dataArray[]=null;
    /* ***Get the input file name from the user and try to create the
     * input stream.  Print a message and terminate the program if a
     * FileNotFoundException error occurs 					*** */
    FileDialog fd=new FileDialog(new Frame(),"Select File",FileDialog.LOAD);
    fd.setVisible(true);
    String fileName=fd.getFile();
    if (fileName==null) {
      return; // user cancelled
    }

    String inputFileName = fd.getDirectory()+fileName;

    // a try block is used to catch exceptions, should one occur
    try {

      // create a File object based on user input
      File f = new File(inputFileName);

      // create a BufferedReader for the file
      BufferedReader bfr = new BufferedReader(new FileReader(f));

      String text;
      System.out.println(inputFileName + "\n\n");

      /* ***  read the first line of the test file which should tell us the
       * number of boxes to use in our calculations - Used to create an array
       * to hold the remainder of the data	*/

      int fSize = Integer.parseInt(bfr.readLine());

      // create array based on the first number written in the text file
      dataArray = new int[fSize];
      int arrayCounter = 0;
      int boxNumber = 1;

      // read the rest of the file in as test data
      while ( (text = bfr.readLine()) != null) {
        //int intLine = Integer.parseInt(text.trim());
        dataArray[arrayCounter] = Integer.parseInt(text.trim());

        System.out.println("Box " + boxNumber + ":  " + dataArray[arrayCounter]); // Tempororay
        arrayCounter++;
        boxNumber++;
      }
      System.out.println("Number of Boxes: " + fSize + "\n"); /////Move to end of box list

      // close the file when done - ints are now in the array
      bfr.close();
    }
    catch (IOException ioe) {
      // an IOException is thrown when there is some problem accessing a file
      System.out.println("Error reading data file.\n");
      ioe.printStackTrace();
    }
    catch (NumberFormatException nfe) {
      // a NumberFormatException is thrown when an attempt is made to convert
      // a non-integer string to an integer
      System.out.println("Error - non-integer value found.\n");
      nfe.printStackTrace();
    }
    catch (Exception e) {
      // generic catch block - this handles any type of Exception
      System.out.println("Error.\n");
      e.printStackTrace();
    }
    calculate(dataArray);
    System.out.println("\nYou have reached the end of the program.\n"); // Temporary
    System.exit(0);
  }

  /* CODE HERE DOES THE RECURSIVE ADDITION */
  //Don't forgetto do calculations
  public void calculate(int dataArray[]) {
    int[] tempHolding = new int[dataArray.length];
    calculate(dataArray, tempHolding, 0); // call private calculate function and pass perameters
  }

  private void calculate(int dataArray[], int tempHolding[], int last) {
    for (int i = last; i < dataArray.length; i++) {
      tempHolding[i] = dataArray[i];
      calculate(dataArray, tempHolding, i + 1);
      tempHolding[i] = 0;
    }
    for (int i = 0; i < tempHolding.length; i++) {
      if (tempHolding[i] != 0) {
        System.out.print(tempHolding[i] + " ");
      }
      System.out.println();
    } //END OF RECURSIVE ADDITION
    // prove that it read the file

  }

}