java实现简易五子棋

学完javase一段时间了，一直没有写过什么，前段时间关注的博主分享学习经验的时候，提到自己学生时期写过java联机五子棋，于是自己也想写一个（当然这次还没实现联机功能，后续可能会写2.0）

1.页面布局

页面布局大概如下，North方一个标签来回切换黑方下子和白方下子，Center是一个棋盘，South方是四个按钮（重新开始，退出游戏，认输，悔棋）

2.实现的功能

2.1棋子四个方向五子的判赢,悔棋，重新开始和认输

3.具体实现思路

1.首先画棋盘19*19，棋盘大小我设置的是600*600，竖线和横线的间隔temp就是600/18。2.画棋子，每词鼠标点击屏幕，就画一个棋子，画的是什么颜色的棋子呢？这就需要一个boolean 型的变量判断（true 黑子，false白子），怎么控制棋子的位置在横竖线的交叉位置呢？那么就需要用到前面的间隔temp，如何控制鼠标点击棋子下在离点击位置最近的交叉位置呢？那么就需要利用%temp后的值和temp/2比较。3.悔期怎么实现呢？那么就需要保存每一步棋子在棋盘上的位置，之后回退。4.重新开始怎么实现？那么就需要把所有用到的变量置初始值

4.注意问题

4.1局部变量和全局变量的选择

因为我的五子棋棋盘写在JPanel 里面，但是我的按钮都是写在JFrame里，这就需要我把JPanel里面用到的变量写成全局变量

4.2思路不清

开始写的时候逻辑很不清楚，遇到不会的问题或思路不清的时候可以百度和看视频（这个五子棋就是看的B站视频）我看到是这个：java实战开发项目_五子棋游戏超级人工智能AI_哔哩哔哩_bilibili

5.总结

视频里面用的是绝对布局，个人不是很喜欢，于是按照自己的想法写了一下，当然看起来也不是很好看。。。当然五子棋的功能也不是很完善，代码也有一些问题，下次五子棋2.0再完善吧！！

最后赋上源代码：

package com.cn;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;public class GoBang extends JFrame implements ActionListener {/*        int width = this.getSize().width; //面板大小int height = this.getSize().height;//  棋盘大小int boardWidth = 720;int boardHeight = 720;// 左上角第一个点int xbase = (width - boardWidth) / 2;int ybase = (height - boardHeight) / 2;*/final int temp = 600 / 18;int width, height, boardWidth, boardHeight, xbase, ybase;/*** 这里进行一些棋子的判断** @param g*/int allChess[][] = new int[19][19];boolean isBlack = true;int x, y;//  这里进行画图时候圆的位置（1,2）在第一行第二列int countx = 0, county = 0; // 为了实现认输的位置int chessX[] = new int[255];//存储棋盘位置，方便回溯int chessY[] = new int[255];boolean canPlay = true; // 能不能继续玩// 三个面板分别放消息提示框，主面板，一些按钮public JPanel jpMessage = new JPanel();public JPanel jpMain;public JPanel jpButton = new JPanel();public JLabel jbMessage;JButton restart;JButton exit;JButton fail;JButton regret;public GoBang() {jpMain = new PaintBoard();this.add(jpMain, BorderLayout.CENTER);jbMessage = new JLabel("黑方下子");jpMessage.add(jbMessage);this.add(jpMessage, BorderLayout.NORTH);// 按钮区的绘制restart = new JButton("重新开始");restart.addActionListener(this);exit = new JButton("退出游戏");exit.addActionListener(this);fail = new JButton("认输");fail.addActionListener(this);regret = new JButton("悔棋");regret.addActionListener(this);jpButton.add(restart);jpButton.add(exit);jpButton.add(fail);jpButton.add(regret);this.add(jpButton, BorderLayout.SOUTH);this.setBounds(0, 0, 800, 800);this.setLocationRelativeTo(null);this.setVisible(true);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}public static void main(String args[]) {GoBang go = new GoBang();}@Overridepublic void actionPerformed(ActionEvent e) {// 重新开始所有清零if (e.getSource() == restart) {for (int i = 0; i < 19; i++) {for (int j = 0; j < 19; j++) {allChess[i][j] = 0;}}this.repaint();isBlack = true;jbMessage.setText("黑方下子");for (int i = 0; i < 19; i++) {chessX[i] = chessY[i] = 0;}canPlay = true;}if (e.getSource() == exit) {System.exit(0);}if (e.getSource() == fail) {JOptionPane.showMessageDialog(this, (isBlack ? "黑子认输" : "白子认输") + ",游戏结束！");canPlay = false;}if (e.getSource() == regret) {if (canPlay) {int result = JOptionPane.showConfirmDialog(this, isBlack ? "白方悔棋，是否同意" : "黑方悔棋，是否同意");// 棋子回退一次，储存棋子横纵坐标的数组也回退,black也要回退if (result == 0) {allChess[chessX[--countx]][chessY[--county]] = 0;if (isBlack)isBlack = false;elseisBlack = true;this.repaint();}}}}// jPMain部分class PaintBoard extends JPanel implements MouseListener {public PaintBoard() {this.addMouseListener(this);}@Overrideprotected void paintComponent(Graphics g) {super.paintComponent(g);width = this.getSize().width; //面板大小height = this.getSize().height;//  棋盘大小boardWidth = 600;boardHeight = 600;// 左上角第一个点,为了让面板居中xbase = (width - boardWidth) / 2;ybase = (height - boardHeight) / 2;Graphics2D g2d = (Graphics2D) g;int x0, y0, x1, y1;//画线的时候用到的四个点this.setBackground(new Color(246, 186, 114));
//            this.addMouseListener(this);for (int i = 0; i <= 18; i++) {if (i == 0 || i == 18) {//调整画线的大小g2d.setStroke(new BasicStroke(3.0f));    //画棋盘边界时，线条加粗。setStroke()方法设置线条粗细,} else {g2d.setStroke(new BasicStroke(1.0f));}//开始确定每一个点的坐标,然后画行x0 = xbase;y0 = ybase + i * temp;x1 = xbase + 18 * temp;y1 = ybase + i * temp;g2d.drawLine(x0, y0, x1, y1);// 开始画列x0 = xbase + temp * i;y0 = ybase;x1 = xbase + temp * i;y1 = ybase + 18 * temp;g2d.drawLine(x0, y0, x1, y1);}int radius = 16;// 开始画黑心点圆和白心圆for (int i = 0; i < 19; i++) {for (int j = 0; j < 19; j++) {if (allChess[i][j] == 1) {g2d.setColor(Color.black);g2d.fillOval(i * temp + xbase - radius / 2, j * temp + ybase - 7, radius, radius);} else if (allChess[i][j] == 2) {g2d.setColor(Color.white);g2d.fillOval(i * temp + xbase - radius / 2, j * temp + ybase - 7, radius, radius);g2d.drawOval(i * temp + xbase - radius / 2, j * temp + ybase - 7, radius, radius);}}}}@Overridepublic void mouseClicked(MouseEvent e) {}@Overridepublic void mousePressed(MouseEvent e) {if (canPlay) {x = e.getX();y = e.getY();//  判断鼠标点击位置if (x >= xbase & x <= (xbase + 18 * temp) & y >= ybase & y < (ybase + 18 * temp)) {// 判断是不是下在空的位置int tempX = (x - xbase) / temp, tempY = (y - ybase) / temp;// todo 这里是关键判断这点坐标的数组下标是什么if ((x - xbase) % temp > temp / 2) {x = tempX + 1;} elsex = tempX;if ((y - ybase) % temp > temp / 2)y = tempY + 1;elsey = tempY;// 先判断有没有棋子，处理没有棋子的情况if (allChess[x][y] != 0) {JOptionPane.showMessageDialog(this, "这里有棋子了");} else {chessX[countx++] = x;chessY[county++] = y;if (isBlack) {System.out.println(x + "," + y);allChess[x][y] = 1;isBlack = false;jbMessage.setText("白方下子");} else {System.out.println(x + "," + y);allChess[x][y] = 2;isBlack = true;jbMessage.setText("黑方下子");}this.repaint();if (isWin()) {JOptionPane.showMessageDialog(this, "You have won the game!");canPlay = false;}}}}}@Overridepublic void mouseReleased(MouseEvent e) {}@Overridepublic void mouseEntered(MouseEvent e) {}@Overridepublic void mouseExited(MouseEvent e) {}// 判断是不是赢了private boolean isWin() {int color = allChess[x][y];int count;
/*            while (color == allChess[x + i][y]) {count++;i++;}i = 1;while (color == allChess[x - i][y]) {count++;i++;}if (count >= 5) {return true;}// 这里进行纵向判断count = 1;i = 1;while (color == allChess[x][y - i]) {count++;i++;}i = 1;while (color == allChess[x][y + i]) {count++;i++;}if (count >= 5) {return true;}// 这里进行斜方向的判断count = 1;i = 1;while (color == allChess[x - i][y - i]) {count++;i++;}i = 1;while (color == allChess[x + i][y + i]) {count++;i++;}if (count >= 5) {return true;}// 这里进行斜方向的判断count = 1;i = 1;while (color == allChess[x + i][y - i]) {count++;i++;}i = 1;while (color == allChess[x - i][y + i]) {count++;i++;}if (count >= 5) {return true;}return false;*/count = this.Count(1, 0, color);if (count >= 5) {return true;} else {count = this.Count(0, 1, color);if (count >= 5) {return true;} else {count = this.Count(1, 1, color);if (count >= 5)return true;else {count = this.Count(1, -1, color);if (count >= 5)return true;}}}return false;}private int Count(int xChange, int yChange, int color) {int count = 1;int tempX = xChange, tempY = yChange;while (color == allChess[x + xChange][y + yChange]) {count++;if (xChange != 0) {xChange++;}if (yChange != 0) {if (yChange > 0)yChange++;elseyChange--;}}xChange = tempX;yChange = tempY;while (color == allChess[x - xChange][y - yChange]) {count++;if (xChange != 0)xChange++;if (yChange != 0) {if (yChange > 0)yChange++;elseyChange--;}}return count;}}
}