Need help fixing NumberFormatException error

I'm trying to read in a text file which looks similar to this:

0000000000   0000100000  0001001000  0000100000  0000000000  

Here is my code:

public static int[][] readBoard(String fileName) throws FileNotFoundException {      File life = new File(fileName);      Scanner s = new Scanner(life);        int row = s.nextInt();      int columns = s.nextInt();      int [][] size = new int [row][columns];            for (int i=0; i <= row; i++) {          String [] state = new String [columns];          String line = s.nextLine();          state = line.split("");          for (int j=0; i <= columns; i++) {              size[i][j] = Integer.parseInt(state[j]);           }      }            return size;  }  

It keeps giving me this error. I think it's the Integer.parseInt(state[j]) that is giving me trouble, but I don't know why.

Exception in thread "main" java.lang.NumberFormatException: For input string: ""      at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:68)      at java.base/java.lang.Integer.parseInt(Integer.java:662)      at java.base/java.lang.Integer.parseInt(Integer.java:770)      at Project5.readBoard(Project5.java:33)      at Project5.main(Project5.java:9)  

https://stackoverflow.com/questions/66700603/need-help-fixing-numberformatexception-error March 19, 2021 at 07:38AM