import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class TicTacToe implements ActionListener {

    private JFrame window = new JFrame("Tic-Tac-Toe");
    private JButton button1 = new JButton("");
    private JButton button2 = new JButton("");
    private JButton button3 = new JButton("");
    private JButton button4 = new JButton("");
    private JButton button5 = new JButton("");
    private JButton button6 = new JButton("");
    private JButton button7 = new JButton("");
    private JButton button8 = new JButton("");
    private JButton button9 = new JButton("");
    private String letter = "";
    private int count = 0;
    private boolean win = false;

    public TicTacToe() {
        /* Create Window */
        window.setSize(300, 300);
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setLayout(new GridLayout(3, 3));

        /* Add Buttons To The Window */
        window.add(button1);
        window.add(button2);
        window.add(button3);
        window.add(button4);
        window.add(button5);
        window.add(button6);
        window.add(button7);
        window.add(button8);
        window.add(button9);

        /* Add The Action Listener To The Buttons */
        button1.addActionListener(this);
        button2.addActionListener(this);
        button3.addActionListener(this);
        button4.addActionListener(this);
        button5.addActionListener(this);
        button6.addActionListener(this);
        button7.addActionListener(this);
        button8.addActionListener(this);
        button9.addActionListener(this);

        /* Make The Window Visible */
        window.setVisible(true);
    }

    public void actionPerformed(ActionEvent a) {
        count++;

        /* Calculate Who's Turn It Is */
        if (count == 1 || count == 3 || count == 5 || count == 7 || count == 9) {
            letter = "X";
        }
        if (count == 2 || count == 4 || count == 6 || count == 8 || count == 10) {
            letter = "O";
        }

        /* Display X's or O's on the buttons */
        if (a.getSource() == button1) {
            button1.setText(letter);
            button1.setEnabled(false);
        }
        if (a.getSource() == button2) {
            button2.setText(letter);
            button2.setEnabled(false);
        }
        if (a.getSource() == button3) {
            button3.setText(letter);
            button3.setEnabled(false);
        }
        if (a.getSource() == button4) {
            button4.setText(letter);
            button4.setEnabled(false);
        }
        if (a.getSource() == button5) {
            button5.setText(letter);
            button5.setEnabled(false);
        }
        if (a.getSource() == button6) {
            button6.setText(letter);
            button6.setEnabled(false);
        }
        if (a.getSource() == button7) {
            button7.setText(letter);
            button7.setEnabled(false);
        }
        if (a.getSource() == button8) {
            button8.setText(letter);
            button8.setEnabled(false);
        }
        if (a.getSource() == button9) {
            button9.setText(letter);
            button9.setEnabled(false);
        }

        // horizontal wins
        if (button1.getText() == button2.getText()
                && button2.getText() == button3.getText()
                && button1.getText() != "") {
            win = true;
        }
        if (button4.getText() == button5.getText()
                && button5.getText() == button6.getText()
                && button4.getText() != "") {
            win = true;
        }
        if (button7.getText() == button8.getText()
                && button8.getText() == button9.getText()
                && button7.getText() != "") {
            win = true;
        }

        // vertical wins
        if (button1.getText() == button4.getText()
                && button4.getText() == button7.getText()
                && button1.getText() != "") {
            win = true;
        }
        if (button2.getText() == button5.getText()
                && button5.getText() == button8.getText()
                && button2.getText() != "") {
            win = true;
        }
        if (button3.getText() == button6.getText()
                && button6.getText() == button9.getText()
                && button3.getText() != "") {
            win = true;
        }

        // diagonal wins
        if (button1.getText() == button5.getText()
                && button5.getText() == button9.getText()
                && button1.getText() != "") {
            win = true;
        }
        if (button3.getText() == button5.getText()
                && button5.getText() == button7.getText()
                && button3.getText() != "") {
            win = true;
        }

        /* Show a dialog if someone wins or the game is tie */
        if (win == true) {
            JOptionPane.showMessageDialog(null, letter + " WINS!");
        }
        if (count == 9 && win == false) {
            JOptionPane.showMessageDialog(null, "Tie Game!");
        }
    }


    public static void main(String[] args) {
        new TicTacToe();
    }
}