Thread: Tic Toe java code exists when we enter 0 row and 0 column

good afternoon everyone. i have been working on a tictactoe game using arrays and if statements and loops. my problem is the game exits when i type in row 0 and column 0. also i was wondering if you could help me change the input method so that the user could type in like 1 and it would place an x or an o in the box. also i just noticed it doesn't stop when you have three in a row

 import java.util.Scanner;
 
/**
   This program runs a TicTacToe game. It prompts the
   user to set positions on the board and prints out the
   result.
*/
public class TicTacToeRunner
{
   public static void main(String[] args)
   {
      Scanner in = new Scanner(System.in);
      char player = 'x';
      TicTacToe game = new TicTacToe();
      boolean done = false;
    int Count=0;
      do{
         System.out.print(game.toString());
         System.out.print(
               "Row for " + player );
         int row = in.nextInt();
 
 
 
            System.out.print("Column for " + player + ": ");
            int column = in.nextInt();
            game.set(row, column, player);
            if (player==('X'))
               player = 'O';
            else
               player = 'X';
         }while(!game.winner()&&Count<=9);
 
   }
}

/**
   A 3 x 3 tic-tac-toe board.
*/
public class TicTacToe
{
   /**
      Constructs an empty board.
   */
   public TicTacToe()
   {
      board = new char [ROWS][COLUMNS];
      // Fill with spaces
      for (int i = 0; i < ROWS; i++)
         for (int j = 0; j < COLUMNS; j++)
            board[i][j] =' ';
   }
 
   /**
      Sets a field in the board. The field must be unoccupied.
      @param i the row index
      @param j the column index
      @param player the player ("x" or "o")
   */
   public void set(int i, int j, char player)
   {
      if (board[i][j]== ' ')
         board[i][j] = player;
   }
 
   /**
      Creates a string representation of the board, such as
      |x  o|
      |  x |
      |   o|
      @return the string representation
   */
   public String toString()
   {
      String r = "";
     r+="   |   |   \n";
     r+=" "+board[0][0]+" |"+board[0][1]+"  |  "+board[0][2]+"\n";
     r+="   |   |   \n";
     r+="----------\n";
     r+="   |   |   \n";
     r+=" "+board[1][0]+" |"+board[1][1]+"  |  "+board[1][2]+"\n";
     r+="   |   |   \n";
     r+="----------\n";
     r+="   |   |   \n";
     r+=" "+board[2][0]+" |"+board[2][1]+"  |  "+board[2][2]+"\n";
     r+="   |   |   \n";
 
 
 
      return r;
   }
 
public boolean winner()
{
boolean winner;
 
if(board[0][0] == board[0][1] && board[0][1] == board[0][2]&&board[0][0] !=' ')
    return true;
if(board[1][0] == board[1][1] && board[1][1] == board[1][2]&&board[1][0] !=' ')
    return true;
if(board[2][0] == board[2][1] && board[2][1] == board[2][2]&&board[2][0] !=' ')
    return true;
if(board[0][0] == board[1][0] && board[1][0] == board[2][0]&&board[0][0] !=' ')
    return true;
if(board[0][1] == board[1][1] && board[1][1] == board[2][1]&&board[0][0] !=' ')
    return true;
if(board[0][2] == board[1][2] && board[1][2] == board[2][2]&&board[0][0] !=' ')
    return true;
if(board[0][0] == board[1][2] && board[1][2] == board[2][2]&&board[0][0] !=' ')
    return true;
if(board[2][0] == board[1][2] && board[1][2] == board[2][1]&&board[0][0] !=' ')
    return true;
 
    return false;
}
 
 
   private char[][] board;
   private static final int ROWS = 3;
   private static final int COLUMNS = 3;
 
}

thanks for all your help

hello again i just fixed the stopping when i put in 0,0 but it keeps going even if i have three x or o's it stops once i get all nine moves. i think i need an if statement in the tic tac toe runner? here is my updated class

/**
   A 3 x 3 tic-tac-toe board.
*/
public class TicTacToe
{
   /**
      Constructs an empty board.
   */
   public TicTacToe()
   {
      board = new char [ROWS][COLUMNS];
      // Fill with spaces
      for (int i = 0; i < ROWS; i++)
         for (int j = 0; j < COLUMNS; j++)
            board[i][j] =' ';
   }
 
   /**
      Sets a field in the board. The field must be unoccupied.
      @param i the row index
      @param j the column index
      @param player the player ("x" or "o")
   */
   public void set(int i, int j, char player)
   {
      if (board[i][j]== ' ')
         board[i][j] = player;
   }
 
   /**
      Creates a string representation of the board, such as
      |x  o|
      |  x |
      |   o|
      @return the string representation
   */
   public String toString()
   {
      String r = "";
     r+="   |   |   \n";
     r+=" "+board[0][0]+" |"+board[0][1]+"  |  "+board[0][2]+"\n";
     r+="   |   |   \n";
     r+="----------\n";
     r+="   |   |   \n";
     r+=" "+board[1][0]+" |"+board[1][1]+"  |  "+board[1][2]+"\n";
     r+="   |   |   \n";
     r+="----------\n";
     r+="   |   |   \n";
     r+=" "+board[2][0]+" |"+board[2][1]+"  |  "+board[2][2]+"\n";
     r+="   |   |   \n";
 
 
 
      return r;
   }
 
public boolean winner()
{
boolean winner;
 
if(board[0][0] == board[0][1] && board[0][1] == board[0][2]&&board[0][0] !=' ')
    return true;
if(board[1][0] == board[1][1] && board[1][1] == board[1][2]&&board[1][0] !=' ')
    return true;
if(board[2][0] == board[2][1] && board[2][1] == board[2][2]&&board[2][0] !=' ')
    return true;
if(board[0][0] == board[1][0] && board[1][0] == board[2][0]&&board[0][1] !=' ')
    return true;
if(board[0][1] == board[1][1] && board[1][1] == board[2][1]&&board[0][2] !=' ')
    return true;
if(board[0][2] == board[1][2] && board[1][2] == board[2][2]&&board[1][1] !=' ')
    return true;
if(board[0][0] == board[1][2] && board[1][2] == board[2][2]&&board[1][2] !=' ')
    return true;
if(board[2][0] == board[1][2] && board[1][2] == board[2][1]&&board[2][1] !=' ')
    return true;
 
    return false;
}
 
 
   private char[][] board;
   private static final int ROWS = 3;
   private static final int COLUMNS = 3;
 
}

also i need help checking for a valid move.

Hello big_c, glad you solved this issue.

What was the problem in the end?