TicTacHoe

package tictactoe;import java.awt.*;import java.awt.event.*;import javax.swing.*;public class TicTacToeV1 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 TicTacToeV1(){    /*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 who won*/        //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;        }                //virticle 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 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 TicTacToeV1();    }}