heibaiqi.java

Java编写的简易黑白翻转棋 实现人机对战 适合初学者学习

                            } else
                            {
                                continueloop = false;
                            }
                        nextx += deltax;
                        nexty += deltay;
                        if(nextx < 0 || nextx > 7 || nexty < 0 || nexty > 7)
                                   continueloop = false;
                    }
                }
        }
    }
     //电脑下棋
    private void mymove()
    {
        hangon();
        boolean computerplaysblack = true;
        if(playerPlaysWhite)
            computerplaysblack = false;
        //此表为各个位置的权值，权值越高则位置越有利
        int advantagearray[][] = {
                                      { 8, 2, 7, 6, 6, 7, 2, 8 },
                                      { 2, 1, 3, 3, 3, 3, 1, 2 },
                                      { 7, 3, 5, 4, 4, 5, 3, 7 },
                                      { 6, 3, 4, 0, 0, 4, 3, 6 },
                                      { 6, 3, 4, 0, 0, 4, 3, 6 },
                                      { 7, 3, 5, 4, 4, 5, 3, 7 },
                                      { 2, 1, 3, 3, 3, 3, 1, 2 },
                                      { 8, 2, 7, 6, 6, 7, 2, 8 }
                                  };
        //将已放置棋子的点权值设为零
        for(int x = 0; x < 8; x++)
            for(int y = 0; y < 8; y++)
                if(gamegrid[x][y] != -1)
                    advantagearray[x][y] = 0;
        //将不能放置棋子的点权值设为零
        for(int x=0; x<8; x++)
          for(int y = 0; y < 8; y++)
                if(advantagearray[x][y] != 0 && !moveisvalid(x, y, 
playerPlaysWhite))
                    advantagearray[x][y] = 0;
        //记录权值最大点，此段程序效率不是很好
        int maxadvantage = 0;
        for(int x = 0; x < 8; x++)
            for(int y = 0; y < 8; y++)
                if(advantagearray[x][y] > maxadvantage)
                    maxadvantage = advantagearray[x][y];

        if(maxadvantage == 0) { nextMove();}
        else
        {
            int xpos = -1;
            int ypos = -1;
            for(int x = 0; x < 8; x++)
            {
                for(int y = 0; y < 8; y++)
                    if(advantagearray[x][y] == maxadvantage)
                    {
                        xpos = x;
                        ypos = y;
                    }
            }

            plantapiece(xpos, ypos, computerplaysblack);
            lastMoveWasWhite = computerplaysblack;
            nextMove();
        }
    }
    //判断胜利
    private void nextMove()
    {
        if(boardisfull()) checkforwin();
        else  if(!playercanmove() && !gamecanmove())
        {
            checkforwin();
        }
        else
        {
            if(lastMoveWasWhite && playerPlaysWhite)
                if(gamecanmove())
                {
                    showStatus("My move.");
                    playersMove = false;
                    mymove();
                }
                else
                {
                    showStatus("I cannot move. Take another turn.");
                    playersMove = true;
                }
                if(lastMoveWasWhite && !playerPlaysWhite)
                if(playercanmove())
                {
                    showStatus("Your move.");
                    playersMove = true;
                }
                else
                {
                    showStatus("You cannot move. My turn.");
                    playersMove = false;
                    mymove();
                }
                if(!lastMoveWasWhite && playerPlaysWhite)
                if(playercanmove())
                {
                    showStatus("Your move.");
                    playersMove = true;
                }
                else
                {
                    showStatus("You cannot move. My turn.");
                    playersMove = false;
                    mymove();
                }
                if(!lastMoveWasWhite && !playerPlaysWhite)
                if(gamecanmove())
                {
                    showStatus("My move.");
                    playersMove = false;
                    mymove();
                }
                else
                {
                    showStatus("I cannot move. Take another turn.");
                    playersMove = true;
                }
        }
    }
    //判断棋盘是否已经下满
    private boolean boardisfull()
    {
        for(int x = 0; x < 8; x++)
            for(int y = 0; y < 8; y++)
            {
                if(gamegrid[x][y] != -1)
                    continue;
                 return false;
            }
        return true;
    }
     //当棋盘已放满时，判断胜利方，计算黑白各有多少子 ，玩家press mouse tostart again，最后置playsmove=false
    private void checkforwin()
    {
        allowPlay = false;
        int blacktotal = 0;
        int whitetotal = 0;
        for(int x = 0; x < 8; x++)
        {
            for(int y = 0; y < 8; y++)
            {
                if(gamegrid[x][y] == 0)
                    whitetotal++;
                else  if(gamegrid[x][y]==1)blacktotal++;
            }

        }

        if(playerPlaysWhite)
        {
            if(whitetotal > blacktotal)
            {
                showStatus("You win! Black total = " + blacktotal + ", white total = " + whitetotal);
                Font font = new Font("Helvetica", 3, 48);
                String winner = new String("You win!");
                Graphics g = getGraphics();
                g.setColor(Color.red);
                g.setFont(font);
                g.drawString(winner, 50, 195);
                Font font2 = new Font("Helvetica", 1, 14);
                String winner2 = new String("To play again, click on the board.");
                g.setFont(font2);
                g.drawString(winner2, 55, 265);
            }
            else
            if(blacktotal > whitetotal)
            {
                showStatus("I win. Black total = " + blacktotal + ", white total = " + whitetotal);
                Font font = new Font("Helvetica", 3, 48);
                String winner = new String("I win!");
                Graphics g = getGraphics();
                g.setColor(Color.red);
                g.setFont(font);
                g.drawString(winner, 50, 195);
                Font font2 = new Font("Helvetica", 1, 14);
                String winner2 = new String("To play again, click on the board.");
                g.setFont(font2);
                g.drawString(winner2, 55, 265);
            }
            else
            {
                showStatus("Tie game. Black total = " + blacktotal + ",whitetotal = " + whitetotal);
                Font font = new Font("Helvetica", 3, 48);
                String winner = new String("A tie!");
                Graphics g = getGraphics();
                g.setColor(Color.red);
                g.setFont(font);
                g.drawString(winner, 50, 195);
                Font font2 = new Font("Helvetica", 1, 14);
                String winner2 = new String("To play again, click on the board.");
                g.setFont(font2);
                g.drawString(winner2, 55, 265);
            }
        }
        else
        if(whitetotal > blacktotal)
        {
            Font font = new Font("Helvetica", 3, 48);
            String winner = new String("I win!");
            Graphics g = getGraphics();
            g.setColor(Color.red);
            g.setFont(font);
            g.drawString(winner, 50, 195);
            Font font2 = new Font("Helvetica", 1, 14);
            String winner2 = new String("To play again, click on the board.");

            g.setFont(font2);
            g.drawString(winner2, 55, 265);
            showStatus("I win. Black total = " + blacktotal + ", white total =" + whitetotal);
        }
        else
        if(blacktotal > whitetotal)
        {
            showStatus("You win! Black total = " + blacktotal + ", white total= " + whitetotal);
            Font font = new Font("Helvetica", 3, 48);
            String winner = new String("You win!");
            Graphics g = getGraphics();
            g.setColor(Color.red);
            g.setFont(font);
            g.drawString(winner, 50, 195);
            Font font2 = new Font("Helvetica", 1, 14);
            String winner2 = new String("To play again, click on the board.");

            g.setFont(font2);
            g.drawString(winner2, 55, 265);
        }
        else
        {
            showStatus("Tie game. Black total = " + blacktotal + ", white total = " + whitetotal);
            Font font = new Font("Helvetica", 3, 48);
            String winner = new String("A tie!");
            Graphics g = getGraphics();
            g.setColor(Color.red);
            g.setFont(font);
            g.drawString(winner, 50, 195);
            Font font2 = new Font("Helvetica", 1, 14);
            String winner2 = new String("To play again, click on the board.");

            g.setFont(font2);
            g.drawString(winner2, 55, 265);
        }
        playersMove = false;
    }
    //玩家可以下棋
    private boolean playercanmove()
    {
        boolean returnvalue = false;
        for(int x = 0; x < 8; x++)
        {
            for(int y = 0; y < 8; y++)
                if(moveisvalid(x, y, !playerPlaysWhite))
                    returnvalue = true;
        }
        return returnvalue;
    }
    //电脑下棋
    private boolean gamecanmove()
    {
        boolean returnvalue = false;
        for(int x = 0; x < 8; x++)
        {
            for(int y = 0; y < 8; y++)
                if(moveisvalid(x, y, playerPlaysWhite))
                    returnvalue = true;
        }
        return returnvalue;
    }

    private  synchronized void hangon()
    {   //其实此处不用synchronized也是可以的；
        try {   Thread.sleep(600); }//设定电脑的等待时间！
        catch(InterruptedException e){}
        finally { return;}
    }
}