Input reader

Question

i am new to java so "forgive" my level of understanding. i need help in writing a program to read a sudoku puzzle from a file.the file should contain 9 lines of text, each line being nine characters long. the digits 1 to 9 will be in their correct positions and unknown positions/cells will be represented by the digit 0. once loaded the program should display the grid followed by a blank line.
I would greatly appreciate a prompt response as i nedd asap.
thx

Answer 1

You'll want to create your data file in notepad (not microsoft word) and save it as something like sudokupuzzle.dat. Or so I assume. I will also assume you're familiar with gathering lines from the user, it's very similar.
BufferedReader fin = new BufferedReader(new FileReader("sudokupuzzle.dat"));Inside the public class you'll need to use
public static void main(String args[]) throws IOExceptionThat BufferedReader bit will go after the public whatnot inside the curly braces.
Then to access it, you'll use a String variable (all data comes in as a String) and do something like:
input = (fin.readLine());When you do an fin.readLine() Java then goes to the next line it wants to get information from the .dat file, so the next fin.readLine() will grab the 2nd line. Be sure to remember that if you reuse the same variable, you'll lose the old variables, which is realtively obvious just making sure.