import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class TicTacToe implements ActionListener {
	
/*Instance Variables*/
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";
} else 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);
} else if(a.getSource() == button2){
button2.setText(letter);
button2.setEnabled(false);
} else if(a.getSource() == button3){
button3.setText(letter);
button3.setEnabled(false);
} else if(a.getSource() == button4){
button4.setText(letter);
button4.setEnabled(false);
} else if(a.getSource() == button5){
button5.setText(letter);
button5.setEnabled(false);
} else if(a.getSource() == button6){
button6.setText(letter);
button6.setEnabled(false);
} else if(a.getSource() == button7){
button7.setText(letter);
button7.setEnabled(false);
} else if(a.getSource() == button8){
button8.setText(letter);
button8.setEnabled(false);
} else if(a.getSource() == button9){
button9.setText(letter);
button9.setEnabled(false);
}

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

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

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

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

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