I’m a beginner in Java and I'm stuck in one step in my practice where I should import an txt file into an array (using JFileChooser)

The text format is as follow 001 839 333 426 …

Where each 3 characters separated by space correspond to xyz where x= line number; y= column number; v= value

I have to replace the values in the board based on the coordinates (xy)

int [][] board =
{
{ 1, 0, 0, 0, 0, 0, 0, 0, 0 },  
{ 0, 0, 0, 0, 0, 0, 0, 0, 0 },          
{ 0, 0, 0, 0, 6, 0, 0, 0, 0 },          
{ 0, 0, 0, 3, 0, 0, 0, 0, 0 },          
{ 0, 0, 0, 0, 0, 0, 0, 0, 0 },          
{ 0, 0, 0, 0, 0, 0, 0, 0, 0 },          
{ 0, 0, 0, 0, 0, 0, 0, 0, 0 },          
{ 0, 0, 0, 0, 0, 0, 0, 0, 0 },          
{ 0, 0, 9, 0, 0, 0, 0, 0, 0 }
}

If an invalide value is found it should not be used for example 901 (because no line available 9).

Any help or thoughts are very welcome.

CodePudding user response：

For those interested finally, I found a way to do the conversion may be not the optimal, but it works:

public boolean loadFromFile(String path) {
try {
  int x, y, v;
  Scanner sc = new Scanner(new String());
  Scanner file = new Scanner(new File(path));
  while (file.hasNextLine()) {
    String newLine = file.nextLine();
    sc = new Scanner(newLine);
    while (sc.hasNext()) {
      String xyvalue = sc.next();
      char[] xyv = xyvalue.toCharArray();
      if (xyv.length == 3) {
        x = Character.getNumericValue(xyv[0]);
        y = Character.getNumericValue(xyv[1]);
        v = Character.getNumericValue(xyv[2]);
        if (x >= 0 && x < 9 && y >= 0 && y < 9 && v > 0 && v <= 9) {
          board[x][y] = v;
        }
      }
    }
  }
  sc.close();
  file.close();
  return true;
} catch (IOException exception) {
  return false;
}