Java版AI五子棋

去年暑假写的，没什么经验，代码写的那个乱啊！！！

AI思路：通过判断棋盘上每个空位的分数，去分数最高的几个点，随机下棋

分数计算思路：能成5个说明能赢了，给最高分

不能成5个，对方能成5个，说明对方要赢了，给第二高分

能成活4，给第三高分

能成活3，给第四高分

能成冲4，给第五高分

能成冲3，给第六高分

能成活2，给第七高分

能成冲2，给第八高分

其他，给最低分

分数设定可自己定义。

因为是去年写的了，思路记得大概就是这样。最近根据书上写了个棋类游戏的设计框架，待完善后再发上来，应该会更新AI思路

下面是去年写的AI五子棋的代码：

git地址：https://git.oschina.net/ysx_xx/JAVA_FiveChessAi.git

package FivechessClient;

import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.ArrayList;
import java.util.Random;

import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

/**
*
* @ClassName: Game
* @Description: AI五子棋
* @author xiaoxiong
* @date 2015年7月3日 下午8:59:02
*
*/
public class Game {
BufferedImage table;
BufferedImage black;
BufferedImage white;

BufferedImage selected;
/**
* 棋子个数
*/
private static int BOARD_SIZE = 15;
/**
* 棋盘宽高
*/
private final int TABLE_WIDTH = 535;
private final int TABLE_HEIGHT = 536;
/**
* 棋盘15等分
*/
private final int RATE = TABLE_WIDTH / BOARD_SIZE;
/**
* 棋盘外边距
*/
private final int X_OFFSET = 5;
private final int Y_OFFSET = 6;
/**
* 棋盘
*/
private int[][] board = new int[BOARD_SIZE][BOARD_SIZE];
/**
* AI分数
*/
private int[][] computerScore = new int[BOARD_SIZE][BOARD_SIZE];
// private int[][] gamerScore = new int[BOARD_SIZE][BOARD_SIZE];

JFrame f = new JFrame("五子棋--小熊");

ChessBoard chessBoard = new ChessBoard();

private static int selectedX = -1;
private static int selectedY = -1;
private static int computerX = -1;
private static int computerY = -1;

private static boolean flagGamer = false; // 记录玩家是否赢了
private static boolean flagComputer = false; // 记录电脑是否赢了

private static int computerscore = 0; // 电脑最大分数
private static int comx, comy; // 玩家下子坐标

private final int HUO = 1;
private final int CHONG = 2;
private static int chesscou = 0;
/**
* 记录找到的分数一样的棋子，随机下这些棋子中的一个，以防步法固定
*/
private ArrayList<ChessXY> chessList = new ArrayList<ChessXY>();

Random rand = new Random();

/**
*
* @Title: initto @Description: 重置游戏 @param @return void @throws
*/
public void initto() {
for (int i = 0; i < BOARD_SIZE; ++i) {
for (int j = 0; j < BOARD_SIZE; ++j) {
board[i][j] = 0;
computerScore[i][j] = 100000;
}
}
chesscou = 0;
computerX = -1;
computerY = -1;
flagGamer = false;
flagComputer = false;
}

/**
*
* @Title: isRun @Description: 判断该位置是否可以走 @param @param x @param @param
*         y @param @return @return boolean @throws
*/
public boolean isRun(int x, int y) {
if (board[x][y] == 0) {
return true;
}
return false;
}

/**
*
* @Title: isWin @Description: 判断下该子是否能赢 @param @param f 颜色 @param @param x
*         坐标 @param @param y @param @return @return boolean @throws
*/
public boolean isWin(int f, int x, int y) {
int i, count = 1;
boolean up, down, right, left, rup, lup, rdown, ldown;
up = down = right = left = rup = lup = rdown = ldown = true;
/* 上下 */
for (i = 1; i < 5; ++i) {
if ((y + i) < BOARD_SIZE) {
if (board[x][y + i] == f && down)
count++;
else
down = false;
}
if ((y - i) >= 0) {
if (board[x][y - i] == f && up)
count++;
else
up = false;
}
}
if (count >= 5) {
return true;
}
count = 1;
/* 左右 */
for (i = 1; i < 5; ++i) {
if ((x + i) < BOARD_SIZE) {
if (board[x + i][y] == f && right)
count++;
else
right = false;
}
if ((x - i) >= 0) {
if (board[x - i][y] == f && left)
count++;
else
left = false;
}
}
if (count >= 5) {
return true;
}
count = 1;
/* 左上右下 */
for (i = 1; i < 5; ++i) {
if ((x + i) < BOARD_SIZE && (y + i) < BOARD_SIZE) {
if (board[x + i][y + i] == f && rdown)
count++;
else
rdown = false;
}
if ((x - i) >= 0 && (y - i) >= 0) {
if (board[x - i][y - i] == f && lup)
count++;
else
lup = false;
}
}
if (count >= 5) {
return true;
}
count = 1;
/* 右上左下 */
for (i = 1; i < 5; ++i) {
if ((x + i) < BOARD_SIZE && (y - i) >= 0) {
if (board[x + i][y - i] == f && rup)
count++;
else
rup = false;
}
if ((x - i) >= 0 && (y + i) < BOARD_SIZE) {
if (board[x - i][y + i] == f && ldown)
count++;
else
ldown = false;
}
}
if (count >= 5) {
return true;
}

return false;
}

/**
*
* @Title: Computer_AI @Description: AI下棋 @param @return void @throws
*/
public void Computer_AI() {
computerscore = 0;
for (int i = 0; i < BOARD_SIZE; ++i) {
for (int j = 0; j < BOARD_SIZE; ++j) {
computerScore[i][j] = 0;
// gamerScore[i][j] = 0;
}
}
getScore();
for (int i = 0; i < BOARD_SIZE; ++i) {
for (int j = 0; j < BOARD_SIZE; ++j) {
if (computerScore[i][j] == computerscore) {
ChessXY chess = new ChessXY(i, j);
chessList.add(chess);
}
}
}
int n = rand.nextInt(chessList.size()); // 电脑根据分值一样的点随机走，防止每次都走相同的步数
comx = chessList.get(n).x;
comy = chessList.get(n).y;
chessList.clear();
}

/**
*
* @Title: getScore @Description: 评分 @param @return void @throws
*/
public void getScore() {
for (int i = 0; i < BOARD_SIZE; ++i) {
for (int j = 0; j < BOARD_SIZE; ++j) {
if (board[i][j] == 0) {
if (isWin(2, i, j)) // 电脑能赢，故给分最高，因为可以结束，所以不再检测
{
computerscore = 13;
computerScore[i][j] = 13;

return;
} else if (isWin(1, i, j)) // 电脑不能赢，玩家能赢，要阻止，所以给12分
{
computerscore = 12;
computerScore[i][j] = 12;
} else if (isHuoOrChong(2, i, j, 4, HUO)) // 电脑玩家都不能赢，电脑能形成活四，给11分
{
computerscore = (computerscore > 11 ? computerscore : 11);
computerScore[i][j] = 11;
} else if (isHuoOrChong(2, i, j, 4, CHONG)) // 电脑玩家都不能赢，电脑能形成冲四，给10分
{
computerscore = (computerscore > 10 ? computerscore : 10);
computerScore[i][j] = 10;
} else if (isHuoOrChong(1, i, j, 4, HUO)) // 电脑玩家都不能赢，玩家能形成活四，给9分
{
computerscore = (computerscore > 9 ? computerscore : 9);
computerScore[i][j] = 9;
} else if (isHuoOrChong(2, i, j, 3, HUO)) // 电脑玩家都不能赢，电脑能形成活三，给8分
{
computerscore = (computerscore > 8 ? computerscore : 8);
computerScore[i][j] = 8;
} else if (isHuoOrChong(1, i, j, 4, CHONG)) // 电脑玩家都不能赢，玩家能形成冲四，给7分
{
computerscore = (computerscore > 7 ? computerscore : 7);
computerScore[i][j] = 7;
} else if (isHuoOrChong(2, i, j, 3, CHONG)) // 电脑玩家都不能赢，电脑能形成冲三，给6分
{
computerscore = (computerscore > 6 ? computerscore : 6);
computerScore[i][j] = 6;
} else if (isHuoOrChong(2, i, j, 2, HUO)) // 电脑玩家都不能赢，电脑能形成活二，给5分
{
computerscore = (computerscore > 5 ? computerscore : 5);
computerScore[i][j] = 5;
} else if (isHuoOrChong(1, i, j, 3, CHONG)) // 电脑玩家都不能赢，玩家能形成冲三，给4分
{
computerscore = (computerscore > 4 ? computerscore : 4);
computerScore[i][j] = 4;
} else if (isHuoOrChong(1, i, j, 2, HUO)) // 电脑玩家都不能赢，玩家能形成活二，给3分
{
computerscore = (computerscore > 3 ? computerscore : 3);
computerScore[i][j] = 3;
} else if (isHuoOrChong(2, i, j, 2, CHONG)) // 电脑玩家都不能赢，电脑能形成冲二，给2分
{
computerscore = (computerscore > 2 ? computerscore : 2);
computerScore[i][j] = 2;
} else if (isHuoOrChong(1, i, j, 2, CHONG)) // 电脑玩家都不能赢，玩家能形成冲二，给1分
{
computerscore = (computerscore > 1 ? computerscore : 1);
computerScore[i][j] = 1;
} else {
computerScore[i][j] = 0;
}
}
}
}
}

/**
*
* @Title: isHuoOrChong @Description: 判断是否为活 @param @param f @param @param
* x @param @param y @param @param num @param @param
* hORc @param @return @return boolean @throws
*/
private boolean isHuoOrChong(int f, int x, int y, int num, int hORc) // 活
{

num += 1;
int i, count = 1;
boolean terminal1 = false;
boolean terminal2 = false;
boolean up, down, right, left, rup, lup, rdown, ldown;
up = down = right = left = rup = lup = rdown = ldown = true;
/* 上下 */
for (i = 1; i < num; ++i) {
if ((y + i) < BOARD_SIZE) {
if (board[x][y + i] == f && down)
count++;
else {
if (board[x][y + i] == 0 && down) {
terminal1 = true;
}
down = false;
}
}
if ((y - i) >= 0) {
if (board[x][y - i] == f && up)
count++;
else {
if (board[x][y - i] == 0 && up) {
terminal2 = true;
}
up = false;
}
}
}
if (count == num - 1 && hORc == HUO && terminal1 && terminal2) {
return true;
}
if (count == num - 1 && hORc == CHONG && ((terminal1 && !terminal2) || (!terminal1 && terminal2))) {
return true;
}
count = 1;
terminal1 = false;
terminal2 = false;
/* 左右 */
for (i = 1; i < num; ++i) {
if ((x + i) < BOARD_SIZE) {
if (board[x + i][y] == f && right)
count++;
else {
if (board[x + i][y] == 0 && right) {
terminal1 = true;
}
right = false;
}
}
if ((x - i) >= 0) {
if (board[x - i][y] == f && left)
count++;
else {
if (board[x - i][y] == 0 && left) {
terminal2 = true;
}
left = false;
}
}
}
if (count == num - 1 && hORc == HUO && terminal1 && terminal2) {
return true;
}
if (count == num - 1 && hORc == CHONG && ((terminal1 && !terminal2) || (!terminal1 && terminal2))) {
return true;
}
count = 1;
terminal1 = false;
terminal2 = false;
/* 左上右下 */
for (i = 1; i < num; ++i) {
if ((x + i) < BOARD_SIZE && (y + i) < BOARD_SIZE) {
if (board[x + i][y + i] == f && rdown)
count++;
else {
if (board[x + i][y + i] == 0 && rdown) {
terminal1 = true;
}
rdown = false;
}
}
if ((x - i) >= 0 && (y - i) >= 0) {
if (board[x - i][y - i] == f && lup)
count++;
else {
if (board[x - i][y - i] == 0 && lup) {
terminal2 = true;
}
lup = false;
}
}
}
if (count == num - 1 && hORc == HUO && terminal1 && terminal2) {
return true;
}
if (count == num - 1 && hORc == CHONG && ((terminal1 && !terminal2) || (!terminal1 && terminal2))) {
return true;
}
count = 1;
terminal1 = false;
terminal2 = false;
/* 右上左下 */
for (i = 1; i < num; ++i) {
if ((x + i) < BOARD_SIZE && (y - i) >= 0) {
if (board[x + i][y - i] == f && rup)
count++;
else {
if (board[x + i][y - i] == 0 && rup) {
terminal1 = true;
}
rup = false;
}
}
if ((x - i) >= 0 && (y + i) < BOARD_SIZE) {
if (board[x - i][y + i] == f && ldown)
count++;
else {
if (board[x - i][y + i] == 0 && ldown) {
terminal2 = true;
}
ldown = false;
}
}
}
if (count == num - 1 && hORc == HUO && terminal1 && terminal2) {
return true;
}
if (count == num - 1 && hORc == CHONG && ((terminal1 && !terminal2) || (!terminal1 && terminal2))) {
return true;
}

return false;
}

public void init() throws Exception {
table = ImageIO.read(new File("image/board.jpg"));
black = ImageIO.read(new File("image/black.gif"));
white = ImageIO.read(new File("image/white.gif"));
selected = ImageIO.read(new File("image/selected.gif"));

for (int i = 0; i < BOARD_SIZE; ++i) {
for (int j = 0; j < BOARD_SIZE; ++j) {
board[i][j] = 0;
computerScore[i][j] = 0;
}
}
chessBoard.setPreferredSize(new Dimension(TABLE_WIDTH, TABLE_HEIGHT));

chessBoard.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
int xPos = (int) ((e.getX() - X_OFFSET) / RATE);
int yPos = (int) ((e.getY() - Y_OFFSET) / RATE);
// System.out.println("1 " + xPos + " " + yPos);
if (isRun(xPos, yPos)) {
flagGamer = isWin(1, xPos, yPos);
board[xPos][yPos] = 1;
chesscou++;
// do //电脑下棋，随机
// {
// comx = (rand.nextInt(535) - X_OFFSET) / RATE;
// comy = (rand.nextInt(536) - Y_OFFSET) / RATE;
// } while (!isRun(comx, comy));
if (chesscou == (BOARD_SIZE * BOARD_SIZE)) {
JOptionPane.showMessageDialog(null, "不相上下！！！\n再来一盘吧！！！", "结束", JOptionPane.ERROR_MESSAGE);
initto();
} else {
Computer_AI(); // 电脑下棋，AI算法
chesscou++;
// System.out.println("2 " + comx + " " + comy);
flagComputer = isWin(2, comx, comy);
board[comx][comy] = 2;
computerX = comx;
computerY = comy;
}
}
chessBoard.repaint();
if (flagGamer) {
JOptionPane.showMessageDialog(null, "厉害厉害！！！\n你赢了！！！", "结束", JOptionPane.ERROR_MESSAGE);
initto();
} else if (flagComputer) {
JOptionPane.showMessageDialog(null, "哈哈哈哈！！！\n你输了！！！", "结束", JOptionPane.ERROR_MESSAGE);
initto();
}
}

public void mouseExited(MouseEvent e) {
selectedX = -1;
selectedY = -1;
chessBoard.repaint();
}
});
chessBoard.addMouseMotionListener(new MouseMotionAdapter() {
public void mouseMoved(MouseEvent e) {
selectedX = (e.getX() - X_OFFSET) / RATE;
selectedY = (e.getY() - Y_OFFSET) / RATE;

chessBoard.repaint();
}
});
f.add(chessBoard);
f.setCursor(new Cursor(Cursor.HAND_CURSOR));
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setResizable(false);
f.pack();
f.setVisible(true);
}

public static void main(String[] args) throws Exception {
Game game = new Game();
game.init();
}

@SuppressWarnings("serial")
class ChessBoard extends JPanel {
public void paint(Graphics g) {
g.drawImage(table, 0, 0, null);
if (selectedX >= 0 && selectedY >= 0) {
g.drawImage(selected, selectedX * RATE + X_OFFSET, selectedY * RATE + Y_OFFSET, null);
}
if (computerX >= 0 && computerY >= 0) {
g.drawImage(selected, computerX * RATE + X_OFFSET, computerY * RATE + Y_OFFSET, null);
}
for (int i = 0; i < BOARD_SIZE; ++i) {
for (int j = 0; j < BOARD_SIZE; ++j) {
if (board[i][j] == 1) {
g.drawImage(black, i * RATE + X_OFFSET, j * RATE + Y_OFFSET, null);
}
if (board[i][j] == 2) {
g.drawImage(white, i * RATE + X_OFFSET, j * RATE + Y_OFFSET, null);
}
}
}
}
}
}

class ChessXY {
int x;
int y;

public ChessXY(int x, int y) {
this.x = x;
this.y = y;
}
}