This document contains Java code for a Tic Tac Toe game with a graphical user interface (GUI). It initializes a grid layout and buttons for user interaction, handles button clicks to alternate turns between 'X' and 'O', and checks for winning conditions. The game can reset once a player wins, displaying a dialog box to indicate the end of the game.

1. Tic Tac Toe game with GUI written in java.
Solution
Answer:
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class TicTacToe extends JPanel
{
JButton buttons[] = new JButton[9];
int alternate = 0;//if this number is a even, then put a X. If it's odd, then put an O
public TicTacToe()
{
setLayout(new GridLayout(3,3));
initializebuttons();
}
public void initializebuttons()
{
for(int i = 0; i <= 8; i++)
{
buttons[i] = new JButton();
buttons[i].setText("");
buttons[i].addActionListener(new buttonListener());
add(buttons[i]); //adds this button to JPanel (note: no need for JPanel.add(...)
//because this whole class is a JPanel already
}
}
public void resetButtons()
{

2. for(int i = 0; i <= 8; i++)
{
buttons[i].setText("");
}
}
// when a button is clicked, it generates an ActionEvent. Thus, each button needs an
ActionListener. When it is clicked, it goes to this listener class that I have created and goes to the
actionPerformed method. There (and in this class), we decide what we want to do.
private class buttonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
JButton buttonClicked = (JButton)e.getSource(); //get the particular button that was clicked
if(alternate%2 == 0)
buttonClicked.setText("X");
else
buttonClicked.setText("O");
if(checkForWin() == true)
{
JOptionPane.showConfirmDialog(null, "Game Over.");
resetButtons();
}
alternate++;
}
public boolean checkForWin()
{
/** Reference: the button array is arranged like this as the board
* 0 | 1 | 2
* 3 | 4 | 5

3. * 6 | 7 | 8
*/
//horizontal win check
if( checkAdjacent(0,1) && checkAdjacent(1,2) ) //no need to put " == true" because the
default check is for true
return true;
else if( checkAdjacent(3,4) && checkAdjacent(4,5) )
return true;
else if ( checkAdjacent(6,7) && checkAdjacent(7,8))
return true;
//vertical win check
else if ( checkAdjacent(0,3) && checkAdjacent(3,6))
return true;
else if ( checkAdjacent(1,4) && checkAdjacent(4,7))
return true;
else if ( checkAdjacent(2,5) && checkAdjacent(5,8))
return true;
//diagonal win check
else if ( checkAdjacent(0,4) && checkAdjacent(4,8))
return true;
else if ( checkAdjacent(2,4) && checkAdjacent(4,6))
return true;
else
return false;
}
public boolean checkAdjacent(int a, int b)
{
if ( buttons[a].getText().equals(buttons[b].getText()) && !buttons[a].getText().equals("") )
return true;
else
return false;

4. }
}
public static void main(String[] args)
{
JFrame window = new JFrame("Tic-Tac-Toe");
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.getContentPane().add(new TicTacToe());
window.setBounds(300,200,300,300);
window.setVisible(true);
}
}