A Java code for the Tic-Tac-Toe game (井字遊戲)

The code below is a runnable Java program for the Tic-tac-Toe game(井字遊戲).You can copy the code and two images and establish a Java project to test on your own.



o.png and x.png:

package com.tictactoe;

import java.awt.EventQueue;
import java.awt.Image;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JTable;
import javax.swing.JButton;
import javax.swing.border.EtchedBorder;
import java.awt.Color;
import java.awt.Font;
import javax.swing.table.DefaultTableModel;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public class TicTacToe extends JFrame {

 private static final long serialVersionUID = 1L;
 private JPanel contentPane;
 private static JTable table;

 
 /**
  * Launch the application.
  */
 public static void main(String[] args) {
  EventQueue.invokeLater(new Runnable() {
   public void run() {

    try {
     TicTacToe frame = new TicTacToe();
     frame.setVisible(true);
    } catch (Exception e) {
     e.printStackTrace();
    }
   }
  });
 }

 // When the value of count is even, it's player O's turn;otherwise, it's player X's turn;
 private int count = 0;
 private int[][] situation; // = new int[3][3]; //null empty; true:O
         // false: X

 private void setTable() {
  final Object[][] tableItems = new Object[][] { { null, null, null },
    { null, null, null }, { null, null, null }, };
  situation = new int[3][3];
  table = new JTable();
  table.setGridColor(new Color(255, 0, 0));

  MouseAdapter mouseListener = new MouseAdapter() {

   /**
    * check if the current player wins
    * 
    * @return
    */
   private boolean checkWhetherTheCurrentPlayerWins() {

    System.out.println("Count = " + count);
    if (count <= 3)
     return false;
    
    int player = (count % 2 == 0)? 1 : 2;

    // check the two oblique lines
    if ( situation[1][1] == player) {
     if (situation[0][0] == player
       && situation[2][2] == player)
      return true;
     if (situation[0][2] == player
       && situation[2][0] == player)
      return true;
    }

    //check rows
    for (int row = 0; row < 3; row++) {
     if (situation[row][0] == player && situation[row][1] == player && situation[row][2] == player)
      return true;
    }

    // check columns
     for (int column = 0 ; column < 3; column ++){
      if (situation[0][column] == player && situation[1][column] == player && situation[2][column] == player)
      return true;
     }

     return false;
   }

   @Override
   public void mousePressed(MouseEvent e) {
    JTable table = (JTable) e.getComponent();
    int column = table.columnAtPoint(e.getPoint());
    int row = table.rowAtPoint(e.getPoint());
    if (table.getValueAt(row, column) != null)
     return;

    boolean OorNot = count % 2 == 0;
    situation[row][column] = OorNot ? 1 : 2;

    String imagePath = "images/" + (OorNot ? "o.png" : "x.png");
    ImageIcon OorXIcon = new ImageIcon(imagePath);
    Image img = OorXIcon.getImage();
    Image newImg = img.getScaledInstance(90, 90,
      java.awt.Image.SCALE_SMOOTH);
    DefaultTableModel tableModel = (DefaultTableModel) table
      .getModel();
    tableModel.setValueAt(new ImageIcon(newImg), row, column);

    if (checkWhetherTheCurrentPlayerWins()){
     JOptionPane.showMessageDialog(null, "Congratuations! Player " + (OorNot ? "O":"X") + " Wins.");
     restart();
     return;
    }
    count++;

   }

   @Override
   public void mouseReleased(MouseEvent e) {
    ((JTable) e.getComponent()).putClientProperty("pressedCell",
      null);
   }
  };
  table.addMouseListener(mouseListener);
  table.setModel(new DefaultTableModel(tableItems, new String[] { "0",
    "1", "2" }) {
   private static final long serialVersionUID = 1L;

   @Override
   public boolean isCellEditable(int row, int column) {
    return false;
   }

  });

  table.setBackground(new Color(153, 255, 255));
  table.setBorder(new EtchedBorder(EtchedBorder.RAISED, new Color(107,
    142, 35), null));
  table.setBounds(89, 70, 270, 270);
  for (int i = 0; i < 3; i++) {
   table.setRowHeight(i, 90);
   table.getColumnModel().getColumn(i)
     .setCellRenderer(new ImageRenderer());
  }

 } // end of reset table

 private void restart(){
  count = 0;
  for (int i = 0; i < 3; i++) {
   for (int j = 0; j < 3; j++)
    table.setValueAt(null, i, j);
  }
  situation = new int[3][3];
 }
 
 /**
  * Create the frame.
  */
 public TicTacToe() {
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  setBounds(100, 100, 450, 470);
  setTitle("Tic-Tac-Toe");
  setResizable(false);
  contentPane = new JPanel();
  contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
  contentPane.setLayout(null);

  setContentPane(contentPane);

  setTable();
  contentPane.add(table);

  JButton btnNewButton = new JButton("Restart");
  btnNewButton.addActionListener(new ActionListener() {
   public void actionPerformed(ActionEvent arg0) {
    restart();
   }
  });
  btnNewButton.setFont(new Font("SansSerif", Font.BOLD, 16));
  btnNewButton.setBounds(180, 380, 90, 25);
  contentPane.add(btnNewButton);
 }

}