Read from file

Question

Hi everyone.
I've been trying finish my "sudoku" game and i really need some help. So as so far i can save my game to the file but i'm having problem with load them. So maybe i shall above my code:
The first method is call when i press load button. (mean method)
     private void loadSudokuFromFile() {
          String fileName = fileNameT.getText();
          if (fileName.length() <= 0) {
               fileName = DEFAULT_FILE_NAME;
               fileNameT.setText("" + DEFAULT_FILE_NAME);
          System.out.println("Reading: " + fileName);
                readSudokuFromFile(fileName);
          lastSavedGridOfValues = createAGridCopy(currentGridOfValues);
          displayGridValues(numberFields, currentGridOfValues, lastSavedGridOfValues);
     }This is a method that read string line by line:
private int[][] readSudokuFromFile(String filename) {
     try {
          DataInputStream dataIn = new DataInputStream(new FileInputStream(filename));
          BufferedReader in = new BufferedReader(new InputStreamReader(dataIn));
          String line;
          while ( (line = in.readLine()) != null ) { // Read Lines
               // CHECK LINE FOR DATA
               if ( (line.length() == 0 || !line.substring(0, 1).equals("|")) || !line.substring(0, 1).equals(" "))
                    continue;
               System.out.println("Data: " + line);
          in.close();
    } catch (Exception _e){//Catch exception if any
      System.err.println("Error: " + _e.getMessage());
    return null;
}I think i need something that would be scann my string and cought only numbers . Somewhere i want to process lines of string from the file. Maybe i need another method ?
The output from my saved game is:
| - 4 - | 7 - - | 2 - 1 |
| - - - | - - - | - 8 9 |
| 1 - 8 | - 5 - | 4 - - |
|-----------------------
| - 1 6 | - - 7 | 8 - - |
| - 4 - | - - - | 1 - 6 |
| 2 - 9 | - - - | - - 5 |
|-----------------------
| 4 5 - | 6 3 2 | - - - |
| - - - | - 1 4 | 9 - 3 |
| - 7 - | - - - | - 1 - |
|-----------------------So there is space between hyphen and numbers . I need only load this numbers the array is 2 dimmensional [9][9]
Thx for any help.

Answer 1

Snowboarder wrote:
because this is my one of the many tasks from school! so it's not up to me.And the format of the file is fixed, you can't change it? That's silly, but ok.
Ok so if i go like this:
import java.io.File;
import java.util.Arrays;
import java.util.Scanner;
private int[][] readFromFile(Scanner file){
Scanner file = new Scanner(new File("ScannerDemo.java"));
while(file.hasNextLine()) {
String line = file.nextLine();
String[] tokens = line.split("\\s+");
System.out.println("word: "+Arrays.toString(tokens));
}so i need anothe method where i could parse my string into integer and use nested for loop to print my data. Am i thinking correctly?
if yes how could i call my "readFromFile" method to another that would execute my tokens parsed into integer?
ThxI don't understand what your are asking.
Did your run my code? Do you understand what it does? If so, surely you can change it so that it suits your needs. If not, please ask a specific question and post your best effort here.