Fill in the blank spaces in Wordsearch.java with random letter (char-s).

FillIn

  import java.util.*;
  Random R = new Random();
  public void FillIn(){
    for (int x = 0; x < columns; x++)
       for (int y = 0; y < rows; y++)
          if (board[x][y] == '-')
              board[x][y] = (char)(R.nextInt(26 + 'a'); 
  }