Tic-Tac-Toe Game in Java using MVC
Below is a simple implementation of the classic Tic-Tac-Toe game in Java, structured using the Model-View-Controller (MVC) design pattern.
Model:
public class Model {
private int moves;
private String symbol;
private int xScore = 0;
private int oScore = 0;
public Model() {
moves = 0;
}
public void setChoice() {
if (moves % 2 == 0 )
symbol = "X";
else
symbol = "O";
}
public void addMoves() {
moves++;
}
public String getSymbol() {
return symbol;
}
public int getMoves() {
return moves;
}
public int getXScore() {
xScore++;
return xScore;
}
public int getOScore() {
oScore++;
return oScore;
}
public void setMoves() {
moves = 0;
}
}
View:
import java.awt.*;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.plaf.metal.MetalButtonUI;
import javax.swing.JButton;
class View extends JFrame {
JButton[] buttons;
Controller controller;
boolean gameEnd;
JLabel textField = new JLabel();
JLabel xScore = new JLabel();
JLabel oScore = new JLabel();
JPanel textPanel = new JPanel();
JPanel buttonPanel = new JPanel();
public View(Controller controller) {
super("TicTacToe");
this.controller = controller;
buttons = new JButton[9];
buttonPanel.setPreferredSize(new Dimension(500, 500));
this.setLayout(new BorderLayout());
this.setSize(500,600);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
addComponentListener(new java.awt.event.ComponentAdapter() {
public void componentResized(java.awt.event.ComponentEvent evt) {
formComponentResized(evt);
}
});
textField.setForeground(Color.BLACK);
textField.setFont(new Font("Serif", Font.PLAIN, 20));
textField.setHorizontalAlignment(JLabel.CENTER);
textField.setText("It´s X's turn!");
xScore.setForeground(Color.BLACK);
xScore.setFont(new Font("Serif", Font.PLAIN, 20));
xScore.setHorizontalAlignment(JLabel.RIGHT);
xScore.setText("Player X Score: 0");
oScore.setForeground(Color.BLACK);
oScore.setFont(new Font("Serif", Font.PLAIN, 20));
oScore.setText("Player O Score: 0");
textPanel.setBounds(0, 0, 600, 100);
textPanel.setLayout(new BorderLayout());
textPanel.setBackground(Color.white);
buttonPanel.setLayout(new GridLayout(3, 3));
for (int i = 0; i < buttons.length; i++) {
buttons[i] = new JButton();
buttons[i].getPreferredSize();
buttonPanel.add(buttons[i]);
buttons[i].setFont(new Font("Serif", Font.PLAIN, 110));
buttons[i].setFocusable(false);
buttons[i].setBackground(Color.white);
}
this.add(buttonPanel);
for (int i = 0; i < buttons.length; i++) {
buttons[i].setActionCommand(String.valueOf(i));
buttons[i].addActionListener(controller);
}
textPanel.add(oScore, BorderLayout.WEST);
textPanel.add(textField, BorderLayout.CENTER);
textPanel.add(xScore, BorderLayout.EAST);
this.add(textPanel, BorderLayout.NORTH);
pack();
this.setVisible(true);
gameEnd = false;
}
public boolean checkForWinner() {
if ((buttons[0].getText()=="X") && (buttons[1].getText()=="X") && (buttons[2].getText()=="X")) {
xWins(0,1,2);
return true;
}
if ((buttons[3].getText()=="X") && (buttons[4].getText()=="X") && (buttons[5].getText()=="X")) {
xWins(3,4,5);
return true;
}
if ((buttons[6].getText()=="X") && (buttons[7].getText()=="X") && (buttons[8].getText()=="X")) {
xWins(6,7,8);
return true;
}
if ((buttons[0].getText()=="X") && (buttons[3].getText()=="X") && (buttons[6].getText()=="X")) {
xWins(0,3,6);
return true;
}
if ((buttons[1].getText()=="X") && (buttons[4].getText()=="X") && (buttons[7].getText()=="X")) {
xWins(1,4,7);
return true;
}
if ((buttons[2].getText()=="X") && (buttons[5].getText()=="X") && (buttons[8].getText()=="X")) {
xWins(2,5,8);
return true;
}
if ((buttons[0].getText()=="X") && (buttons[4].getText()=="X") && (buttons[8].getText()=="X")) {
xWins(0,4,8);
return true;
}
if ((buttons[2].getText()=="X") && (buttons[4].getText()=="X") && (buttons[6].getText()=="X")) {
xWins(2,4,6);
return true;
}
if ((buttons[0].getText()=="O") && (buttons[1].getText()=="O") && (buttons[2].getText()=="O")) {
oWins(0,1,2);
return true;
}
if ((buttons[3].getText()=="O") && (buttons[4].getText()=="O") && (buttons[5].getText()=="O")) {
oWins(3,4,5);
return true;
}
if ((buttons[6].getText()=="O") && (buttons[7].getText()=="O") && (buttons[8].getText()=="O")) {
oWins(6,7,8);
return true;
}
if ((buttons[0].getText()=="O") && (buttons[3].getText()=="O") && (buttons[6].getText()=="O")) {
oWins(0,3,6);
return true;
}
if ((buttons[1].getText()=="O") && (buttons[4].getText()=="O") && (buttons[7].getText()=="O")) {
oWins(1,4,7);
return true;
}
if ((buttons[2].getText()=="O") && (buttons[5].getText()=="O") && (buttons[8].getText()=="O")) {
oWins(2,5,8);
return true;
}
if ((buttons[0].getText()=="O") && (buttons[4].getText()=="O") && (buttons[8].getText()=="O")) {
oWins(0,4,8);
return true;
}
if ((buttons[2].getText()=="O") && (buttons[4].getText()=="O") && (buttons[6].getText()=="O")) {
oWins(2,4,6);
return true;
}
return false;
}
public void updateGame() {
if(checkForWinner() == true) {
Object[] option={"Ok","Exit"};
int n=JOptionPane.showOptionDialog(this, "Play Again?","Message",JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE,null,option,option[0]);
if(n==0){
textField.setText("It´s X's turn!");
gameEnd = false;
for (int i = 0; i < buttons.length; i++) {
buttons[i].setEnabled(true);
buttons[i].setText("");
buttons[i].setBackground(Color.white);
controller.setMoves();
}
}
else{
gameEnd = true;
}
}
else if (controller.getMoves() == 9) {
textField.setText("Match tie!");
JOptionPane.showMessageDialog(this, "Match tie!","Message", JOptionPane.INFORMATION_MESSAGE);
Object[] option={"Ok","Exit"};
int n=JOptionPane.showOptionDialog(this, "Play Again?","Message",JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE,null,option,option[0]);
if(n==0){
textField.setText("It´s X's turn!");
gameEnd = false;
for (int i = 0; i < buttons.length; i++) {
buttons[i].setEnabled(true);
buttons[i].setText("");
buttons[i].setBackground(Color.white);
controller.setMoves();
}
}
else{
gameEnd = true;
}
}
}
public void endGame() {
for (int i = 0; i < buttons.length; i++)
buttons[i].setEnabled(false);
}
public void xWins(int pos1, int pos2, int pos3) {
buttons[pos1].setBackground(Color.LIGHT_GRAY);
buttons[pos2].setBackground(Color.LIGHT_GRAY);
buttons[pos3].setBackground(Color.LIGHT_GRAY);
textField.setText("X wins!");
xScore.setText("Player X Score: " + controller.getXScore() + "");
JOptionPane.showMessageDialog(this, "Player X won the game!","Message", JOptionPane.INFORMATION_MESSAGE);
}
public void oWins(int pos1, int pos2, int pos3) {
buttons[pos1].setBackground(Color.LIGHT_GRAY);
buttons[pos2].setBackground(Color.LIGHT_GRAY);
buttons[pos3].setBackground(Color.LIGHT_GRAY);
textField.setText("O wins!");
oScore.setText("Player O Score: " + controller.getOScore() + "");
JOptionPane.showMessageDialog(this, "Player O won the game!","Message", JOptionPane.INFORMATION_MESSAGE);
}
private void formComponentResized(java.awt.event.ComponentEvent evt) {
for(int i=0;i<9;i++) {
buttons[i].setFont(buttons[i].getFont().deriveFont((float)(buttons[i].getWidth()/2)));
}
}
public void setText(String symbol, int i) {
if(symbol == "X") {
if (buttons[i].getText() == "") {
buttons[i].setUI(new MetalButtonUI() {
protected Color getDisabledTextColor() {
return Color.red;
}
});
buttons[i].setText(symbol);
textField.setText("It´s O's turn!");
}
}
else {
if (buttons[i].getText() == "") {
buttons[i].setUI(new MetalButtonUI() {
protected Color getDisabledTextColor() {
return Color.blue;
}
});
buttons[i].setText(symbol);
textField.setText("It´s X´s turn!");
}
}
buttons[i].setEnabled(false);
}
}
Controller:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
class Controller implements ActionListener {
private View view;
private Model model;
public Controller(Model model) {
this.model = model;
}
@Override
public void actionPerformed(ActionEvent e) {
if (view.gameEnd == false) {
model.setChoice();
if (e.getActionCommand() != "") {
int button = Integer.parseInt(e.getActionCommand());
view.setText(model.getSymbol(), button);
model.addMoves();
}
}
}
public void setView(View view) {
this.view = view;
}
public int getMoves() {
return model.getMoves();
}
public int getXScore() {
return model.getXScore();
}
public int getOScore() {
return model.getOScore();
}
public void setMoves() {
model.setMoves();
}
}
TicTacToe (main):
public class TicTacToe {
public static void main(String[] args) {
Model model = new Model();
Controller controller = new Controller(model);
View view = new View(controller);
controller.setView(view);
boolean run = true;
while (run) {
view.updateGame();
if (view.gameEnd == true) {
view.endGame();
run = false;
}
}
System.exit(0);
}
}