Write a java applet that will allow two players to play a Tic-Tac-Toe game. Plea

Question

Write a java applet that will allow two players to play a Tic-Tac-Toe game. Please note the following: The applet should show a message indicating the winner or a draw at the end of the game. Assume the size of the applet is 500 by 500 which is divided into an even 3 by 3 grid. The symbols of the two players (X and O) should be drawn using the draw methods of the Graphics object (You can't use drawString method to draw the X and the O). The X and O should occupy most of the cell area. The horizontal and vertical lines between the cells should be of width 10. Also the width of the borderlines of the X and O should be of width 10.

Explanation / Answer

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;

public class TicTacToe extends Applet implements MouseListener
{
    Frame f;
    int flag=2,n,m,i=0;
    char ch[]=new char[9];

    public TicTacToe()
    {
        f=new Frame("Tic Tac Toe");
        f.setLayout(null);
        f.setVisible(true);
        f.setSize(500,500);
        f.addMouseListener(this);
        for(i=0;i<9;i++)
        ch[i]='B';
    }
    public void mouseClicked(MouseEvent e)
    {
        Graphics g=f.getGraphics();
        g.drawLine(166,0,166,500);
        g.drawLine(333,0,333,500);
        g.drawLine(0,166,500,166);
        g.drawLine(0,333,500,333);
        flag--;
        int x=e.getX();
        int y=e.getY();
        if(flag==1)
        {
            if(x<166&&y<166){m=0;n=0;ch[0]='R';}
            if((x>166&&x<333)&&(y<166)){m=166;n=0;ch[1]='R';}
            if((x>333&&x<500)&&(y<166)){m=333;n=0;ch[2]='R';}
            if(x<166&&(y>166&&y<333)){m=0;n=166;ch[3]='R';}
            if((x>166&&x<333)&&(y>166&&y<333)){m=166;n=166;ch[4]='R';}
            if((x>333&&x<500)&&(y>166&&y<333)){m=333;n=166;ch[5]='R';}
            if(x<166&&(y>333&&y<500)){m=0;n=333;ch[6]='R';}
            if((x>166&&x<333)&&(y>333&&y<500)){m=166;n=333;ch[7]='R';}
            if((x>333&&x<500)&&(y>333&&y<500)){m=333;n=333;ch[8]='R';}
            g.setColor(Color.red);
            g.drawLine(m,n,m+199,n+199);
            g.drawLine(m+199,n,m,n+199);
        }

        if(flag==0)
        {

            if(x<166&&y<166){m=0;n=20;ch[0]='P';}
            if((x>166&&x<333)&&(y<166)){m=166;n=20;ch[1]='P';}
            if((x>333&&x<500)&&(y<166)){m=333;n=20;ch[2]='P';}
            if(x<166&&(y>166&&y<333)){m=0;n=166;ch[3]='P';}
            if((x>166&&x<333)&&(y>166&&y<333)){m=166;n=166;ch[4]='P';}
            if((x>333&&x<500)&&(y>166&&y<333)){m=333;n=166;ch[5]='P';}
            if(x<166&&(y>333&&y<500)){m=0;n=333;ch[6]='P';}
            if((x>166&&x<333)&&(y>333&&y<500)){m=166;n=333;ch[7]='P';}
            if((x>333&&x<500)&&(y>333&&y<500)){m=333;n=333;ch[8]='P';}
            g.setColor(Color.green);
            g.drawOval(m+10,n+10,169,169);
            flag=flag+2;
        }

        for(i=0;i<9;i++)   // for draw
        {
            if(ch[i]!='B')
            {
                if(i==8)
                draw();
            }
            else
            break;
        }

        for(i=0;i<3;i++)     //for vertical
        {
            //      System.out.print(ch[i]);
            if(ch[i]!='B')
            {
                if((ch[i+3]==ch[i])&&(ch[i+6]==ch[i]))
                win();
            }
        }
        for(i=0;i<7;i++)   //for horizontal
        {

            if(ch[i]!='B')
            {
                if((ch[i]==ch[i+1])&&(ch[i]==ch[i+2]))
                win();
                i=i+2;
            }
            else
            i=i+2;
        }

        if(ch[4]!='B')     //for diagonals
        {
            if(((ch[0]==ch[4])&&(ch[4]==ch[8]))||((ch[2]==ch[4])&&(ch[4]==ch[6])))
            win();
        }

    }
    public Frame win()
    {

        Frame m=new Frame("Result");
        Label l=new Label("you win");
        m.setLayout(null);
        m.add(l);
        l.setBounds(20,20,60,60);
        m.setVisible(true);
        m.setSize(100,100);
        return m;
    }

    public Frame draw()
    {
        Frame m=new Frame("Result");
        Label l1=new Label("Stalemate");
        m.setLayout(null);
        m.add(l1);
        l1.setBounds(20,20,60,60);
        m.setVisible(true);
        m.setSize(100,100);
        return m;

    }
    public void mouseReleased(MouseEvent e)
    {
        System.out.print("");
    }

    public void mouseEntered(MouseEvent e)

    {
        System.out.print("");
    }
    public void mouseExited(MouseEvent e)
    {
        System.out.print("");
    }
    public void mousePressed(MouseEvent e)
    {
        System.out.print("");
    }

    public static void main(String args [])
    {
        new TicTacToe();
    }
}

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