Need some help with Tic Tac Toe game

Question

hey. hope u guys can help me out...
having a problem with my tic tac toe program...
i have 2 problems.
1) got the "X" and "O" to appear using a flag(teacher didn't explain)
using code like this
if (jb == button[0]){
if (flag==0)
button[0].setText("X");
else
button[0].setText("O");
//toggle
flag = (flag==0)?1:0;
my problem is how do i get it to stop.(For example button[1] is selected as "X"..how do i stop it from albe to switch to "O")
2) found this code in javascript online and i want to do what it does in java code
if(button[0] == " X " && button[1] == " X " && button[2] == " X ")
alert("You Win!");
reset();
how would i do that?
thanks for the help.

Answer 1

ok here's my code:
//TTT.java
import javax.swing.*;
import java.awt.*;
import java .awt.event.*;
public class TTT extends JFrame
                    implements WindowListener, ActionListener
private JFrame frFirst;
private Container cnFirst,cnSecond;
private     JButton button[]=new JButton[9];
private JButton btnNewGame,btnExit;
private FlowLayout southLayout;
private JPanel southPanel;
private int flag;
public TTT()
               frFirst=new JFrame ("Michael's Tic Tac Toe Game!");
               cnFirst=frFirst.getContentPane();
               cnFirst.setLayout (new GridLayout (4,4));
               cnFirst.setBackground(Color.green);
          for(int i=0;i<button.length;i++)
                    button[i] = new JButton();
                    cnFirst.add(button);
                    flag=0;
          southPanel = new JPanel ();
          btnNewGame = new JButton ("New Game");
          southPanel.add (btnNewGame);
          btnExit = new JButton ("EXIT");
          southPanel.add (btnExit);
          frFirst.add (southPanel,BorderLayout.SOUTH);
          frFirst.setLocation(200, 200);
          frFirst.setSize(400,400);
          frFirst.setResizable(false);
          frFirst.setVisible(true);
          this.frFirst.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               // listeners
               frFirst.addWindowListener(this);
               button[0].addActionListener(this);
               button[1].addActionListener(this);
               button[2].addActionListener(this);
               button[3].addActionListener(this);
               button[4].addActionListener(this);
               button[5].addActionListener(this);
               button[6].addActionListener(this);
               button[7].addActionListener(this);
               button[8].addActionListener(this);
               btnNewGame.addActionListener (this);
               btnExit.addActionListener (this);
     //define methods of WindowListener
public void windowOpened(WindowEvent we)
     public void windowClosing(WindowEvent we)
     System.exit(0);
     public void windowClosed(WindowEvent we)
     public void windowIconified(WindowEvent we)
     public void windowDeiconified(WindowEvent we)
     public void windowActivated(WindowEvent we)
     public void windowDeactivated(WindowEvent we)
public void actionPerformed(ActionEvent ae)
//making the X and O to appear on JButtons
     Object obj = ae.getSource();
          if (obj instanceof JButton){
               JButton jb = (JButton)obj;
               if (jb == button[0])
                    if (flag==0)
                    button[0].setText("X");
               else
                    button[0].setText("O");
                    //toggle
                    flag = (flag==0)?1:0;
               if(jb==button[1])
                    if (flag==0)
                    button[1].setText("X");
               else
                    button[1].setText("O");
                    //toggle
                    flag = (flag==0)?1:0;
               if(jb==button[2])
                    if (flag==0)
                    button[2].setText("X");
               else
                    button[2].setText("O");
                    //toggle
                    flag = (flag==0)?1:0;
               if(jb==button[3])
                    if (flag==0)
                    button[3].setText("X");
               else
                    button[3].setText("O");
                    //toggle
                    flag = (flag==0)?1:0;
               if(jb==button[4])
                    if (flag==0)
                    button[4].setText("X");
               else
                    button[4].setText("O");
                    //toggle
                    flag = (flag==0)?1:0;
               if(jb==button[5])
                    if (flag==0)
                    button[5].setText("X");
               else
                    button[5].setText("O");
                    //toggle
                    flag = (flag==0)?1:0;
               if(jb==button[6])
                    if (flag==0)
                    button[6].setText("X");
               else
                    button[6].setText("O");
                    //toggle
                    flag = (flag==0)?1:0;
               if(jb==button[7])
                    if (flag==0)
                    button[7].setText("X");
               else
                    button[7].setText("O");
                    //toggle
                    flag = (flag==0)?1:0;
               if(jb==button[8])
                    if (flag==0)
                    button[8].setText("X");
               else
                    button[8].setText("O");
                    //toggle
                    flag = (flag==0)?1:0;
//New Game To Reset
          if (ae.getSource () == btnNewGame)
/*     String text = JOptionPane.showInputDialog(null,"Do You Want To Start A New Game?","Michael's Tic Tac Toe Game!",JOptionPane.WARNING_MESSAGE);
String YES;
if (text == YES)
     JOptionPane.showMessageDialog(null,"Do You","Michael's Tic Tac Toe Game!",JOptionPane.WARNING_MESSAGE);
     else{
add code to reset game
     //Exit Button to Exit
     if (ae.getSource () == btnExit)
          JOptionPane.showMessageDialog(null,"Thanks For Playing!","Michael's Tic Tac Toe Game!",JOptionPane.INFORMATION_MESSAGE);
          this.setVisible(false);
     System.exit(0);
          }     //end of if instanceof
public static void main(String[]args)
     //instantiate GUI
     new TTT();