Thread: TicTacToe Game errors

Hello. I'm to get this TicTacToe program to stop and display the winner (or if there's a tie) and stop when the game ends. I'm trying to do this by getting the main method to read the output from the getOtutcome method via the for loops, but I can't get it to work. Is there some other way of doing this?

package tictactoeguigame;
 
import java.awt.event.*;
import games.board.*;
import javax.swing.*;
 
public class TicTacToeGUIGame extends JFrame {
 
    private Board gb;
    private int turn;
 
    public static void main(String[] args) {
        SwingUtilities.invokeLater( new Runnable () {
            public void run(){ new TicTacToeGUIGame(); }
        });
 
        //This if then statement is meant to read the returned value from the getOutcome and use the value to determine which message to display.
if(getOutcome == Outcome.PLAYER1_WIN)
        JOptionPane.showMessageDialog(this, noughtOutcome);
    else if(getOutcome == Outcome.PLAYER2_WIN)
        JOptionPane.showMessageDialog(this, crossOutcome);
    else if(getOutcome == Outcome.TIE)
        JOptionPane.showMessageDialog(this,tieOutcome);
    return null;
    }
 
    //This method is the code that reads the marks on the board and returns a value based on which player won or if there is a tie.
public static int getOutcome() {
    for (int rows = -1; rows < Board.cells.length; rows++) { 
        for (int cols = -1; cols < Board.cells[rows].length; cols++) { 
            return Outcome.TIE; 
        } 
    }
    for (int rows = -1; rows < Board.cells.length; rows++) { 
        for (int cols = -1; cols < Board.cells[rows].length; cols++) { 
            return Outcome.PLAYER1_WIN; 
        } 
    }
for (int rows = 1; rows < Board.cells.length; rows++) { 
    for (int cols = 1; cols < Board.cells[rows].length; cols++) { 
        return Outcome.PLAYER2_WIN; 
    } 
}
return Outcome.CONTINUE;
}
 
//This code is meant to keep the turns going until the game ends, at which point it stops and the main method displays a message
    private void takeTurn(Cell c) {
        If (Outcome == Outcome.CONTINUE) {
        Mark curMark = (turn++ % 2 == 0)?Mark.NOUGHT: Mark.CROSS;
        gb.setCell(curMark,c.getRow(),c.getColumn());}
 
    }
 
    //This code is the GUI for the game, there aren't any problems here.
private TicTacToeGUIGame() {
    gb = new Board(3, 3, new ActionListener() {
        public void actionPerformed(ActionEvent ae) {
            Cell c = (Cell) ae.getSource();
            takeTurn(c);
        }
    });
        this.add(gb);
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setTitle("TIC-TAC-TOE");
        this.setSize(300, 300);
        this.setVisible(true); 
    }
}

package games.board;
 
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
public class Board extends JComponent {
   public static Cell[][] cells;
   public Board(int rows, int columns, ActionListener ah) {
    cells = new Cell[rows][columns];
    this.setLayout(new GridLayout(rows,columns));
    for( int r = 0; r < cells.length; r++ ) {
        for (int c = 0; c < cells[r].length; c++) {
            cells[r][c] = new Cell(r,c);
            this.add(cells[r][c]);
            cells[r][c].addActionListener(ah);}
    }
}
 public void setCell(Mark mark, int row, int column) throws IllegalArgumentException {
       if (cells[row][column].getContent() == Mark.EMPTY) { 
           cells[row][column].setContent(mark);
       }
       else {
           throw new IllegalArgumentException("Player already there!");
       }
   }
   public Cell getCell(int row, int column) {
        return cells[row][column];
   }
 
    @Override
   public String toString() {
       StringBuilder str = new StringBuilder();
 
       for( int r = 0; r < cells.length; r++ ) {
           str.append("|");
           for (int c = 0; c < cells[r].length; c++) {
               switch(cells[r][c].getContent()) {
                   case NOUGHT:
                       str.append("O");
                       break;
                   case CROSS:
                       str.append("X");
                       break;
                   case YELLOW:
                       str.append("Y");
                       break;
                   case RED:
                       str.append("R");
                       break;
                   case BLUE:
                       str.append("B");
                       break;
                   case GREEN:
                       str.append("G");
                       break;
                   case MAGENTA:
                       str.append("M");
                       break;
                   case ORANGE:
                       str.append("N");
                       break;
                   default:        //Empty
                       str.append(" ");
               }
               str.append("|");
           }
           str.append("\n");
       }
       return str.toString();
   } 
}

package games.board;
 
import java.awt.*;
import javax.swing.*;
 
public class Cell extends JButton {
 
    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        int offset = 5;
        Graphics2D g2 = (Graphics2D) g;
        g2.setStroke(new BasicStroke(5));
        switch(content) {
            case NOUGHT:  g2.setColor(Color.RED);
            g2.drawOval(offset, offset, this.getWidth() -
                    offset * 2, this.getHeight() - offset * 2);
            break;
            case CROSS:
                g2.setColor(Color.BLACK);
                g2.drawLine(offset, offset, this.getWidth() - 
                        offset  , this.getHeight() - offset );
                g2.drawLine(this.getWidth() - 
                        offset, offset , offset, this.getHeight()- offset);
                break;
        }
    }
 
    private Mark content;
    private int row, column;
 
    public Cell(int row, int column) {
        this.row = row;
        this.column = column;
        content = Mark.EMPTY;
    }
    public Mark getContent() { return content; }
    public void setContent(Mark content) { this.content = content;
    }
    public int getRow() { return row; }
    public int getColumn() { return column; }
}

package games.board;
 
public enum Mark {EMPTY, NOUGHT, CROSS, YELLOW, RED, BLUE, GREEN, MAGENTA, ORANGE}

package games.board;
 
public enum Outcome {PLAYER1_WIN, PLAYER2_WIN, CONTINUE, TIE}

package games.board;
 
public enum Player {FIRST, SECOND}

I can't get it to work.

Where in the code is the problem you describe? I do not see any comments in the code like:
// <<<<<<< HOW TO GET PROGRAM TO STOP HERE???

Can you add some comments to the code describing what it is supposed to do?


Note: The code has lots of compiler errors that need to be fixed. Please fix the errors or copy the full text of the compiler's error messages and paste it here if you need help.

cannot find symbol
symbol: variable getOutcome
location: class tictactoeguigame.TicTacToeGUIGame

What line in what source file was that error on? Your posting left off that information.

The compiler can not find a definition for the variable: getOutcome. Where is it defined?

Did you mean to reference the method with that name? To call a method add () to the end of the name.

Exception in thread "main" java.lang.NullPointerException
at tictactoeguigame.TicTacToeGUIGame.getOutcome(TicTa cToeGUIGame.java:29)

Look at the statement on line 29 and find the variable with the null value. If you can't see any likely null values, add a print statement just before line 29 that prints the values of all the variables used on line 29. The print out will show you what variable has the null value.
Then backtrack in the code to see why that variable does not have a valid value.