Develop Reference

Swing frame doesnt hold or stay after clicking jbutton

I have 2 text areas with a button in between them in a frame in swing and I am using netbeans.
Clicking the button picks up an sql query from textArea1, using getText().
The input is processed (i.e. checked the spellings of the keywords after splitting the query) with SubmitData(). Inside that method, it only uses setText() to set the output to textArea2.
My Problem Is:
The frame just doesn't stay or hold after I press the button.
Here is my code:
void createUI() throws Exception
{
JFrame frame = new JFrame("JDBC All in One");
// Layout of Main Window
Container c = frame.getContentPane();
c.setLayout(new BoxLayout(c, BoxLayout.Y_AXIS));
textArea1 = new JTextArea(10, 50);
textArea1.setBounds(10, 10, 30, 30);
btnInsert = new JButton("Submit");
btnInsert.setBounds(10, 10, 10, 10);
btnInsert.addActionListener(this);
textArea2 = new JTextArea(10, 50);
textArea2.setBounds(10, 10, 30, 30);
JPanel pnlInput1 = new JPanel();
JPanel pnlInput2 = new JPanel();
JPanel pnlInput3 = new JPanel();
pnlInput1.add(textArea1);
pnlInput3.add(btnInsert);
pnlInput2.add(textArea2);
frame.add(pnlInput1);
frame.add(pnlInput3);
frame.add(pnlInput2);
frame.setSize(400, 500);
frame.pack();
frame.setVisible(true);
}
public void actionPerformed(ActionEvent evt)
{
String cmd = evt.getActionCommand();
if (cmd.equals("Submit")) {
try {
SubmitData();
} catch (Exception e) {}
}
}
public static void SubmitData() throws Exception {
s1 = textArea1.getText();
String[] s2 = s1.split("\\s+");
for (int i = 0; i < s2.length; i++) {
if (s2[i] .equals("elect")|| s2[i] .equals("selct") || s2[i].equals("slect" )|| s2[i].equals("selec")|| s2[i].equals("seect")
{
textArea2.setText("use 'select' instead of " + s2[i]);
System.exit(0);
}
if (s2[i] == "updat" || s2[i] == "updae" || s2[i] == "updte" || s2[i] == "upate") {
textArea2.setText("use 'update' instead of " + s2[i]);
System.exit(0);
}
if (s2[i] == "delet" || s2[i] == "delte" || s2[i] == "elete" || s2[i] == "dlete") {
textArea2.setText("use 'delete' instead of " + s2[i]);
System.exit(0);
}
if (s2[i] == "fro" || s2[i] == "frm" || s2[i] == "fom") {
textArea2.setText("use 'from' instead of " + s2[i]);
System.exit(0);
}
}
}
Edited-i've changed "==" fro string comparision with .equals() but the problem doesnt seem to go away.

System.exit(0);terminates your JVM. Remove it if you want to keep your frame.
Edit for second question :
After your first if, replace your if by else if in order that the others if don't execute when a condition is true.
for (int i = 0; i < s2.length; i++) {
if (s2[i] .equals("elect")|| s2[i] .equals("selct") || s2[i].equals("slect" )|| s2[i].equals("selec")|| s2[i].equals("seect")
{
textArea2.setText("use 'select' instead of " + s2[i]);
}
else if (s2[i] == "updat" || s2[i] == "updae" || s2[i] == "updte" || s2[i] == "upate") {
textArea2.setText("use 'update' instead of " + s2[i]);
}
else if (s2[i] == "delet" || s2[i] == "delte" || s2[i] == "elete" || s2[i] == "dlete") {
textArea2.setText("use 'delete' instead of " + s2[i]);
}
else if (s2[i] == "fro" || s2[i] == "frm" || s2[i] == "fom") {
textArea2.setText("use 'from' instead of " + s2[i]);
}
}

How do I use a JButton in more than 1 method?

So I've been coding my TicTacToe project as a side project for some time now, and have hit another obstacle. I want to use a JButton in more than one method, but I don't know how to go about doing that. Here's my code till now.
`
import java.util.Random ;
import java.util.Scanner ;
import javax.swing.JOptionPane ;
import javax.swing.JFrame ;
import javax.swing.JPanel ;
import java.util.InputMismatchException ;
import java.awt.BorderLayout ;
import java.awt.* ;
import java.awt.event.* ;
import javax.swing.JTextArea ;
import javax.swing.JButton ;
import javax.swing.JRadioButton ;
class TicTacToe
{
public int count = 1 ;
public String letter;
public boolean b1bool = true ;
public boolean b2bool = true ;
public boolean b3bool = true ;
public boolean b4bool = true ;
public boolean b5bool = true ;
public boolean b6bool = true ;
public boolean b7bool = true ;
public boolean b8bool = true ;
public boolean b9bool = true ;
public boolean win = false ;
public void main(String []args)
{
popupintroscreen();
}
public void popupintroscreen()
{
JTextArea introtext = new JTextArea("Welcome to TicTacToe v1.0. This is a Simple Tic Tac Toe app coded by Abhishek Pisharody. Press the button below to play, or view the instructions first, if you prefer. We hope you enjoy playing. Thank you.");
introtext.setEditable(false);
introtext.setLineWrap(true);
JButton startgamebutton = new JButton("Start Game");
startgamebutton.setToolTipText("Start a game of Tic-Tac-Toe");
startgamebutton.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent gamestart)
{
JOptionPane.showMessageDialog(null, "Loading.....done!");
tictactoe();
}
});
JButton showinstructions = new JButton("Show Instructions");
showinstructions.setToolTipText("View game instructions. Worth checking out even if you know how to play.");
showinstructions.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent displayinstructionsprompt)
{
JOptionPane.showMessageDialog(null, "Nothing to see here..yet..off you go!");
}
});
JButton highscoresbutton = new JButton("High Scores");
highscoresbutton.setToolTipText("Show high scores for the game");
highscoresbutton.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent highscoresbuttonclicked)
{
JOptionPane.showMessageDialog(null,"Not coded yet!");
}
});
JButton quitgamebutton = new JButton("Quit Game");
quitgamebutton.setToolTipText("Quit the game. But why? :(");
quitgamebutton.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onquitgamebuttonclick)
{
JOptionPane.showConfirmDialog(null, "Really quit?");
System.exit(0);
}
});
JPanel gamebuttonsholder = new JPanel(new BorderLayout());
gamebuttonsholder.setSize(400,100);
gamebuttonsholder.add(introtext,BorderLayout.PAGE_START);
gamebuttonsholder.add(startgamebutton,BorderLayout.PAGE_END);
gamebuttonsholder.add(showinstructions,BorderLayout.LINE_START);
gamebuttonsholder.add(highscoresbutton,BorderLayout.CENTER);
gamebuttonsholder.add(quitgamebutton,BorderLayout.LINE_END);
JFrame introscreen = new JFrame("Tic Tac Toe");
introscreen.setSize(400,400);
introscreen.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
introscreen.setLocationRelativeTo(null);
introscreen.add(gamebuttonsholder);
introscreen.setVisible(true);
}
public int tictactoe()
{
final JButton b1 = new JButton("");
b1.setToolTipText("Mark this box");
b1.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b1bool == true){ count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b1.setText(letter);
b1bool = false ;
calculatevictory();
processturn();
}}});
final JButton b2 = new JButton("");
b2.setToolTipText("Mark this box");
b2.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b2bool == true){ count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b2.setText(letter);
b2bool = false ;
calculatevictory();
processturn();
}}
});
final JButton b3 = new JButton("");
b3.setToolTipText("Mark this box");
b3.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if(b3bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b3.setText(letter);
b3bool = false ;
calculatevictory();
processturn();
}}
});
final JButton b4 = new JButton("");
b4.setToolTipText("Mark this box");
b4.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if(b4bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b4.setText(letter);
b4bool = false ;
calculatevictory();
processturn();
}}
});
final JButton b5 = new JButton("");
b5.setToolTipText("Mark this box");
b5.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b5bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b5.setText(letter);
b5bool = false ;
calculatevictory();
processturn();
}}
});
final JButton b6 = new JButton("");
b6.setToolTipText("Mark this box");
b6.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b6bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b6.setText(letter);
b6bool = false ;
calculatevictory();
processturn();
}}
});
final JButton b7 = new JButton("");
b7.setToolTipText("Mark this box");
b7.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b7bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b7.setText(letter);
b7bool = false ;
calculatevictory();
processturn();
}}
});
final JButton b8 = new JButton("");
b8.setToolTipText("Mark this box");
b8.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if(b8bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b8.setText(letter);
b8bool = false ;
calculatevictory();
processturn();
}}
});
final JButton b9 = new JButton("");
b9.setToolTipText("Mark this box");
b9.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if(b9bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b9.setText(letter);
b9bool = false ;
calculatevictory();
processturn();
}}
});
GridLayout gamescreenlayout = new GridLayout(3,3);
JPanel gamescreencontent = new JPanel();
gamescreencontent.setLayout(gamescreenlayout);
gamescreencontent.setSize(400,400);
gamescreencontent.add(b1);
gamescreencontent.add(b2);
gamescreencontent.add(b3);
gamescreencontent.add(b4);
gamescreencontent.add(b5);
gamescreencontent.add(b5);
gamescreencontent.add(b6);
gamescreencontent.add(b7);
gamescreencontent.add(b8);
gamescreencontent.add(b9);
JFrame gamescreen = new JFrame("Tic-Tac-Toe");
gamescreen.setSize(400,400) ;
gamescreen.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gamescreen.setLocationRelativeTo(null);
gamescreen.add(gamescreencontent);
gamescreen.setVisible(true);
int sexyshit = 1 ;
return sexyshit ;
}
public void calculatevictory(){
if (b1.getText() == b2.getText() && b2.getText() == b3.getText() && b1.getText() != "")
{
win = true ;
}
else if (b4.getText() == b5.getText() && b5.getText() == b6.getText() && b4.getText() != "")
{
win = true ;
}
else if (b7.getText() == b8.getText() && b8.getText() == b9.getText() && b7.getText() != "")
{
win = true ;
}
else if (b1.getText() == b4.getText() && b4.getText() == b7.getText() && b1.getText() != "")
{
win = true ;
}
else if (b2.getText() == b5.getText() && b5.getText() == b8.getText() && b2.getText() != "")
{
win = true ;
}
else if (b3.getText() == b6.getText() && b6.getText() == b9.getText() && b3.getText() != "")
{
win = true ;
}
else if (b1.getText() == b5.getText() && b5.getText() == b9.getText() && b1.getText() != "")
{
win = true ;
}
else if (b3.getText() == b5.getText() && b5.getText() == b7.getText() && b3.getText() != "")
{
win = true ;
}
else
{
win = false ;
}
}
public void processturn()
{
if (win == true)
{
JOptionPane.showMessageDialog(null, letter + "wins!");
}
else if ( count == 9 && win == false)
{
JOptionPane.showMessageDialog(null, "Tie Game");
}
}
}`
When I try to run this, it tells me that the compiler couldn't find symbol b1. Would I have to make the buttons public(if so, how?), or use Inheritance? If it's the latter, please explain in simple terms, because I really haven't begun to learn inheritance yet.
Thank you in advance.

Declare your JButton outside the method, in the same place as where you are declaring your int, String, and booleans. In other words, something like
class TicTacToe
{
//...
JButton b1;
//...
public int TicTacToe()
{
b1 = new JButton(); //note that you don't need the ""
}
}
Incidentally, I'd recommend using arrays and looping through them rather than having 9 of everything and having to copy-paste code lots of times.

How do I create Logic based AI for my Java Tic Tac Toe Program?

I've almost put the wraps on my program, but I want to add some way for users to play against the computer. For this, I need to create some kind of conditional logic based AI, but can't see which approach to take.
I don't want the computer to take its turn randomly, I want it to actually play like a human player. Would I have to use a deeply nested if statements and multiple moves for each possible turn, or use some kind of for or while loop?
My code reduced to just the WinChecker is here:
public void calculatevictory(){
if (b1.getText() == b2.getText() && b2.getText() == b3.getText() && b1.getText() != "")
{
win = true ;
}
else if (b4.getText() == b5.getText() && b5.getText() == b6.getText() && b4.getText() != "")
{
win = true ;
}
else if (b7.getText() == b8.getText() && b8.getText() == b9.getText() && b7.getText() != "")
{
win = true ;
}
else if (b1.getText() == b4.getText() && b4.getText() == b7.getText() && b1.getText() != "")
{
win = true ;
}
else if (b2.getText() == b5.getText() && b5.getText() == b8.getText() && b2.getText() != "")
{
win = true ;
}
else if (b3.getText() == b6.getText() && b6.getText() == b9.getText() && b3.getText() != "")
{
win = true ;
}
else if (b1.getText() == b5.getText() && b5.getText() == b9.getText() && b1.getText() != "")
{
win = true ;
}
else if (b3.getText() == b5.getText() && b5.getText() == b7.getText() && b3.getText() != "")
{
win = true ;
}
else
{
win = false ;
}
}
My code so far is here:
/* PROGRAM NAME : TIC TAC TOE
* AUTHOR : Jack Robinson
* DATE : 7/17/2014
*/
// Importing necessary classes and directories
import java.util.Random ;
import java.util.Scanner ;
import javax.swing.JOptionPane ;
import javax.swing.JFrame ;
import javax.swing.JPanel ;
import java.util.InputMismatchException ;
import java.awt.BorderLayout ;
import java.awt.* ;
import java.awt.event.* ;
import javax.swing.JTextArea ;
import javax.swing.JButton ;
import javax.swing.JRadioButton ;
import java.awt.Font ;
//Creating class
class TicTacToe
{
//Declaring all instance members
public int count = 1 ;
public String letter;
public boolean b1bool = true ;
public boolean b2bool = true ;
public boolean b3bool = true ;
public boolean b4bool = true ;
public boolean b5bool = true ;
public boolean b6bool = true ;
public boolean b7bool = true ;
public boolean b8bool = true ;
public boolean b9bool = true ;
public boolean win = false ;
public boolean gameinit = true ;
private JButton b1 ;
private JButton b2 ;
private JButton b3 ;
private JButton b4 ;
private JButton b5 ;
private JButton b6 ;
private JButton b7 ;
private JButton b8 ;
private JButton b9 ;
private JFrame gamescreen ;
private JFrame introscreen ;
public Font TToeFont = new Font("Arial",Font.PLAIN,40);
// Main method
public static void main(String []args)
{
// Calls the method which pops up the intro screen ;
TicTacToe runnext = new TicTacToe();
runnext.popupintroscreen();
}
public void popupintroscreen()
{
//Creating introduction text and it's wrapper
JTextArea introtext = new JTextArea("Welcome to TicTacToe v1.0. This is a Simple Tic Tac Toe app coded by Abhishek Pisharody. Press the button below to play, or view the instructions first, if you prefer. We hope you enjoy playing. Thank you.");
introtext.setEditable(false);
introtext.setLineWrap(true);
// ----------------------------------- DECLARING ALL JBUTTONS IN THE INTRO SCREEN AND ADDING ACTION LISTENERS ---------------------------------------------------
JButton startgamebutton = new JButton("Start Game");
startgamebutton.setToolTipText("Start a game of Tic-Tac-Toe");
startgamebutton.setFont(TToeFont);
startgamebutton.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent gamestart)
{
if(gameinit == true){
JOptionPane.showMessageDialog(null, "Loading.....done!");
tictactoe();
gameinit = false;
} else {
JOptionPane.showMessageDialog(null, "The game is already running" , "Error" , JOptionPane.ERROR_MESSAGE);
}
}
});
JButton showinstructions = new JButton("Show Instructions");
showinstructions.setToolTipText("View game instructions. Worth checking out even if you know how to play.");
showinstructions.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent displayinstructionsprompt)
{
JOptionPane.showMessageDialog(null, "Nothing to see here..yet..off you go!");
}
});
JButton highscoresbutton = new JButton("High Scores");
highscoresbutton.setToolTipText("Show high scores for the game");
highscoresbutton.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent highscoresbuttonclicked)
{
JOptionPane.showMessageDialog(null,"Not coded yet!");
}
});
JButton quitgamebutton = new JButton("Quit Game");
quitgamebutton.setToolTipText("Quit the game. But why? :(");
quitgamebutton.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onquitgamebuttonclick)
{
int response = JOptionPane.showConfirmDialog(null, "Are you sure you want to quit the game?" , "Really quit?" , JOptionPane.YES_NO_OPTION );
if(response == JOptionPane.YES_OPTION)
{
System.exit(0);
}
}
});
//Creating intro screen content pane and adding buttons to it
JPanel gamebuttonsholder = new JPanel(new BorderLayout());
gamebuttonsholder.setSize(400,100);
gamebuttonsholder.add(introtext,BorderLayout.PAGE_START);
gamebuttonsholder.add(startgamebutton,BorderLayout.PAGE_END);
gamebuttonsholder.add(showinstructions,BorderLayout.LINE_START);
gamebuttonsholder.add(highscoresbutton,BorderLayout.CENTER);
gamebuttonsholder.add(quitgamebutton,BorderLayout.LINE_END);
//Creating the screen itself and setting it visible
introscreen = new JFrame("Tic Tac Toe");
introscreen.setSize(400,400);
introscreen.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
introscreen.setLocationRelativeTo(null);
introscreen.add(gamebuttonsholder);
introscreen.setVisible(true);
}
// Creating the method which powers the game ;
public int tictactoe()
{
// ----=---------------------- CREATING ALL JBUTTONS ON THE GAME SCREEN AND ADDING ACTION LISTENERS AND REACTIONS -----------------------------------------
b1 = new JButton("");
b1.setToolTipText("Mark this box");
b1.setFont(TToeFont);
b1.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b1bool == true){ count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b1.setText(letter);
b1bool = false ;
calculatevictory();
processturn();
}}});
b2 = new JButton("");
b2.setFont(TToeFont);
b2.setToolTipText("Mark this box");
b2.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b2bool == true){ count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b2.setText(letter);
b2bool = false ;
calculatevictory();
processturn();
}}
});
b3 = new JButton("");
b3.setToolTipText("Mark this box");
b3.setFont(TToeFont);
b3.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if(b3bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b3.setText(letter);
b3bool = false ;
calculatevictory();
processturn();
}}
});
b4 = new JButton("");
b4.setToolTipText("Mark this box");
b4.setFont(TToeFont);
b4.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if(b4bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b4.setText(letter);
b4bool = false ;
calculatevictory();
processturn();
}}
});
b5 = new JButton("");
b5.setToolTipText("Mark this box");
b5.setFont(TToeFont);
b5.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b5bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b5.setText(letter);
b5bool = false ;
calculatevictory();
processturn();
}}
});
b6 = new JButton("");
b6.setToolTipText("Mark this box");
b6.setFont(TToeFont);
b6.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b6bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b6.setText(letter);
b6bool = false ;
calculatevictory();
processturn();
}}
});
b7 = new JButton("");
b7.setToolTipText("Mark this box");
b7.setFont(TToeFont);
b7.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b7bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b7.setText(letter);
b7bool = false ;
calculatevictory();
processturn();
}}
});
b8 = new JButton("");
b8.setToolTipText("Mark this box");
b8.setFont(TToeFont);
b8.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if(b8bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b8.setText(letter);
b8bool = false ;
calculatevictory();
processturn();
}}
});
b9 = new JButton("");
b9.setToolTipText("Mark this box");
b9.setFont(TToeFont);
b9.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if(b9bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b9.setText(letter);
b9bool = false ;
calculatevictory();
processturn();
}}
});
//CREATING GAME SCREEN LAYOUT
GridLayout gamescreenlayout = new GridLayout(3,3);
//CREAING GAME SCREEN CONTENT PANE AND ADDING BUTTONS TO IT
JPanel gamescreencontent = new JPanel();
gamescreencontent.setLayout(gamescreenlayout);
gamescreencontent.setSize(400,400);
gamescreencontent.add(b1);
gamescreencontent.add(b2);
gamescreencontent.add(b3);
gamescreencontent.add(b4);
gamescreencontent.add(b5);
gamescreencontent.add(b5);
gamescreencontent.add(b6);
gamescreencontent.add(b7);
gamescreencontent.add(b8);
gamescreencontent.add(b9);
// CREATING GAME SCREEN AND SETTING IT VISIBLE
gamescreen = new JFrame("Tic-Tac-Toe");
gamescreen.setSize(400,400) ;
gamescreen.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gamescreen.setLocationRelativeTo(null);
gamescreen.add(gamescreencontent);
gamescreen.setVisible(true);
int gamestuff = 1 ;
return gamestuff ;
}
// This method checks if someone won the game every time you click a button
public void calculatevictory(){
if (b1.getText() == b2.getText() && b2.getText() == b3.getText() && b1.getText() != "")
{
win = true ;
}
else if (b4.getText() == b5.getText() && b5.getText() == b6.getText() && b4.getText() != "")
{
win = true ;
}
else if (b7.getText() == b8.getText() && b8.getText() == b9.getText() && b7.getText() != "")
{
win = true ;
}
else if (b1.getText() == b4.getText() && b4.getText() == b7.getText() && b1.getText() != "")
{
win = true ;
}
else if (b2.getText() == b5.getText() && b5.getText() == b8.getText() && b2.getText() != "")
{
win = true ;
}
else if (b3.getText() == b6.getText() && b6.getText() == b9.getText() && b3.getText() != "")
{
win = true ;
}
else if (b1.getText() == b5.getText() && b5.getText() == b9.getText() && b1.getText() != "")
{
win = true ;
}
else if (b3.getText() == b5.getText() && b5.getText() == b7.getText() && b3.getText() != "")
{
win = true ;
}
else
{
win = false ;
}
}
// This method sends the win message
public void processturn()
{
if (win == true)
{
int restart = JOptionPane.showConfirmDialog(null, letter + " wins! Play again? " ,letter + " Wins!" , JOptionPane.YES_NO_OPTION);
if(restart == JOptionPane.NO_OPTION)
{
gamescreen.dispose();
resetgame();
}
else {
resetgame();
}}
else if ( count == 10 && win == false)
{
JOptionPane.showMessageDialog(null, "Tie Game");
resetgame();
}
}
// This method resets all game variables
public void resetgame()
{
count = 1 ;
b1bool = true ;
b2bool = true ;
b3bool = true ;
b4bool = true ;
b5bool = true ;
b6bool = true ;
b7bool = true ;
b8bool = true ;
b9bool = true ;
win = false ;
gameinit = true ;
b1.setText("");
b2.setText("");
b3.setText("");
b4.setText("");
b5.setText("");
b6.setText("");
b7.setText("");
b8.setText("");
b9.setText("");
}
}
// END OF PROGRAM

Here you go, an entire tic-tac-toe in less than 70 lines of code (in Scala - totally impossible to be this concise in many other languages). First argument to the application is a "true" or "false" to specify human first. Second argument is an integer that will control the depth in which the AI will think (how many moves ahead). Use coordinates to specify your move (starting at 0,0). The App will print the board each move and stop when the game has ended.
It uses a simple brute force lookahead AI, which by the way is very slow for the first couple of moves. You could optimize this either by:
Adding memoization so game trees are not recomputed
Adding a lookup table for opening moves
Just optimize the code, so using mutable data structures and such
code:
import scalaz.syntax.id._
import scala.collection.immutable.IndexedSeq
import scala.util.Try
case class Board(moves: List[(Int, Int)], maxDepth: Int = 4) {
val grid: IndexedSeq[(Int, Int)] = (0 to 2).flatMap(i => (0 to 2).map((_, i)))
def isThree(l: List[(Int, Int)], axis: ((Int, Int)) => Int): Boolean =
l.map(_.swap |> axis).distinct.size == 3 && (l.map(axis).distinct.size == 1 ||
l.map(axis) == l.map(_.swap |> axis) || l.map(axis) == l.map(_.swap |> axis).reverse)
def playerWon(player: List[((Int, Int), Int)]): Boolean =
player.map(_._1).combinations(3).map(_.sortBy(_._1)).exists(p => isThree(p, _._1) || isThree(p, _._2))
def hasWinner: Boolean = {
val (crosses, circles) = moves.zipWithIndex.partition(_._2 % 2 == 0)
playerWon(crosses) || playerWon(circles)
}
def computerMove: Board = Board({
val remainingMoves = grid.filterNot(moves.contains)
var (mvOpt, badMoves, depth) = (Option.empty[(Int, Int)], Set.empty[(Int, Int)], 1)
while (mvOpt.isEmpty && depth <= maxDepth) {
val lookAheadFunc: ((Int, Int)) => Boolean = mv => Board(mv +: moves, maxDepth) |>
List.fill[Board => Board](depth - 1)(_.computerMove).foldLeft[Board => Board](identity)(_ compose _) |>
(_.hasWinner)
if (remainingMoves.size >= depth) mvOpt = if (depth % 2 == 0) {
badMoves ++= remainingMoves.filter(lookAheadFunc)
val okMoves = remainingMoves.filterNot(badMoves)
if (okMoves.size == 1) okMoves.headOption else None
} else remainingMoves.filterNot(badMoves).find(lookAheadFunc)
depth += 1
}
mvOpt.getOrElse(remainingMoves.filterNot(badMoves).headOption.getOrElse(remainingMoves.head))
} +: moves, maxDepth)
def print: Board = {
(0 to 2).reverse.foreach(i => println((moves.reverse.zipWithIndex.map(p =>
if (p._2 % 2 == 0) (p._1, "X") else (p._1, "O")) ++
grid.filterNot(moves.contains).map((_, "B"))).filter(_._1._2 == i).sortBy(_._1._1).map(_._2).mkString))
this
}
def humanAttempt: Try[Board] = Try({
val Array(x, y) = readLine("Your move (of form x,y) $ ").split(",").map(_.toInt)
require(!(x > 2 || x < 0 || y > 2 || y < 0 || moves.contains((x, y))), "Move not valid: " +(x, y))
Board((x, y) +: moves, maxDepth)
})
def humanMove: Board = {
var moveAttempt = humanAttempt
while (moveAttempt.isFailure) {
println("Bad move: " + moveAttempt.failed.get.getMessage)
moveAttempt = humanAttempt
}
moveAttempt.get
}
}
object TicTacToe extends App {
var (board, humanNext) = (Board(Nil, args.drop(1).headOption.map(_.toInt).getOrElse(4)).print, args(0).toBoolean)
while (!board.hasWinner && board.moves.size != 9) {
board = (if (humanNext) board.humanMove else {
println("Computer moving")
board.computerMove
}).print
humanNext = !humanNext
}
}

Java Tic Tac Toe AI not working [closed]

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My AI code for a computer player is not working as expected. I want it to play a random move, but block an opponent's incoming winning turn. However, it sometimes stops working altogether, and other times plays a specific move even though there is no incoming win combo. My computer AI code is below.
public void compturn()
{
count++ ;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
if (b1.getText() == b2.getText() && b2.getText() != "" && b3.getText() == "")
{
b3.setText(letter);
b3bool = false ;
}
else if (b4.getText() == b5.getText() && b6.getText() == "")
{
b6.setText(letter);
b6bool = false ;
}
else if (b7.getText() == b8.getText() && b9.getText() == "")
{
b9.setText(letter);
b9bool = false ;
}
else if (b1.getText() == b4.getText() && b4.getText() != "" && b7.getText() == "")
{
b7.setText(letter);
b7bool = false ;
}
else if (b2.getText() == b5.getText() && b8.getText() == "")
{
b8.setText(letter);
b8bool = false ;
}
else if (b3.getText() == b6.getText() && b9.getText() == "")
{
b9.setText(letter);
b9bool = false ;
}
else if (b1.getText() == b5.getText() && b5.getText() != "" && b9.getText() == "")
{
b9.setText(letter) ;
b9bool = false ;
}
else if (b3.getText() == b5.getText() && b7.getText() == "")
{
b7.setText(letter);
b7bool = false ;
}
else
{
randomMove();
}
}
public void randomMove()
{
int randomnum = (int)(Math.random() * 10);
if(randomnum == 1 )
{
if(b1.getText().equals("X") || b1.getText().equals("O"))
{
randomMove();
}
else
{
b1.setText(letter);
}
}
if(randomnum == 2 )
{
if(b2.getText().equals("X") || b2.getText().equals("O"))
{
randomMove();
}
else
{
b2.setText(letter);
}
}
if(randomnum == 3 )
{
if(b3.getText().equals("X") || b3.getText().equals("O"))
{
randomMove();
}
else
{
b3.setText(letter);
}
}
if(randomnum == 4 )
{
if(b4.getText().equals("X") || b4.getText().equals("O"))
{
randomMove();
}
else
{
b4.setText(letter);
}
}
if(randomnum == 5 )
{
if(b5.getText().equals("X") || b5.getText().equals("O"))
{
randomMove();
}
else
{
b5.setText(letter);
}
}
if(randomnum == 6 )
{
if(b6.getText().equals("X") || b6.getText().equals("O"))
{
randomMove();
}
else
{
b6.setText(letter);
}
}
if(randomnum == 7 )
{
if(b7.getText().equals("X") || b7.getText().equals("O"))
{
randomMove();
}
else
{
b7.setText(letter);
}
}
if(randomnum == 8 )
{
if(b8.getText().equals("X") || b8.getText().equals("O"))
{
randomMove();
}
else
{
b8.setText(letter);
}
}
if(randomnum == 9 )
{
if(b9.getText().equals("X") || b9.getText().equals("O"))
{
randomMove();
}
else
{
b9.setText(letter);
}
}
}
And my complete code for the main game is here
public int oneplayergame()
{
// ----=---------------------- CREATING ALL JBUTTONS ON THE GAME SCREEN AND ADDING ACTION LISTENERS AND REACTIONS -----------------------------------------
b1 = new JButton("");
b1.setToolTipText("Mark this box");
b1.setFont(TToeFont);
b1.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b1bool == true){ count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b1.setText(letter);
b1bool = false ;
calculatevictory();
compturn();
processturn();
}}});
b2 = new JButton("");
b2.setFont(TToeFont);
b2.setToolTipText("Mark this box");
b2.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b2bool == true){ count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b2.setText(letter);
b2bool = false ;
calculatevictory();
compturn();
processturn();
}}
});
b3 = new JButton("");
b3.setToolTipText("Mark this box");
b3.setFont(TToeFont);
b3.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if(b3bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b3.setText(letter);
b3bool = false ;
calculatevictory();
compturn();
processturn();
}}
});
b4 = new JButton("");
b4.setToolTipText("Mark this box");
b4.setFont(TToeFont);
b4.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if(b4bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b4.setText(letter);
b4bool = false ;
calculatevictory();
compturn();
processturn();
}}
});
b5 = new JButton("");
b5.setToolTipText("Mark this box");
b5.setFont(TToeFont);
b5.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b5bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b5.setText(letter);
b5bool = false ;
calculatevictory();
compturn();
processturn();
}}
});
b6 = new JButton("");
b6.setToolTipText("Mark this box");
b6.setFont(TToeFont);
b6.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b6bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b6.setText(letter);
b6bool = false ;
calculatevictory();
compturn();
processturn();
}}
});
b7 = new JButton("");
b7.setToolTipText("Mark this box");
b7.setFont(TToeFont);
b7.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if (b7bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b7.setText(letter);
b7bool = false ;
calculatevictory();
compturn();
processturn();
}}
});
b8 = new JButton("");
b8.setToolTipText("Mark this box");
b8.setFont(TToeFont);
b8.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if(b8bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b8.setText(letter);
b8bool = false ;
calculatevictory();
compturn();
processturn();
}}
});
b9 = new JButton("");
b9.setToolTipText("Mark this box");
b9.setFont(TToeFont);
b9.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(ActionEvent onclickb1)
{
if(b9bool == true){
count++;
if(count == 1||count == 3 || count == 5 || count == 7 || count == 9 || count == 11)
{
letter = "O" ;
}
else if ( count == 2 || count == 4 || count == 6 || count == 8 || count == 10)
{
letter = "X" ;
}
b9.setText(letter);
b9bool = false ;
calculatevictory();
compturn();
processturn();
}}
});
//CREATING GAME SCREEN LAYOUT
//CREAING GAME SCREEN CONTENT PANE AND ADDING BUTTONS TO IT
// This method checks if someone won the game every time you click a button
public void calculatevictory(){
if (b1.getText() == b2.getText() && b2.getText() == b3.getText() && b1.getText() != "")
{
win = true ;
}
else if (b4.getText() == b5.getText() && b5.getText() == b6.getText() && b4.getText() != "")
{
win = true ;
}
else if (b7.getText() == b8.getText() && b8.getText() == b9.getText() && b7.getText() != "")
{
win = true ;
}
else if (b1.getText() == b4.getText() && b4.getText() == b7.getText() && b1.getText() != "")
{
win = true ;
}
else if (b2.getText() == b5.getText() && b5.getText() == b8.getText() && b2.getText() != "")
{
win = true ;
}
else if (b3.getText() == b6.getText() && b6.getText() == b9.getText() && b3.getText() != "")
{
win = true ;
}
else if (b1.getText() == b5.getText() && b5.getText() == b9.getText() && b1.getText() != "")
{
win = true ;
}
else if (b3.getText() == b5.getText() && b5.getText() == b7.getText() && b3.getText() != "")
{
win = true ;
}
else
{
win = false ;
}
}
// This method sends the win message
public void processturn()
}
// This method resets all game variables
public void resetgame()
{
count = 1 ;
b1bool = true ;
b2bool = true ;
b3bool = true ;
b4bool = true ;
b5bool = true ;
b6bool = true ;
b7bool = true ;
b8bool = true ;
b9bool = true ;
win = false ;
gameinit = true ;
b1.setText("");
b2.setText("");
b3.setText("");
b4.setText("");
b5.setText("");
b6.setText("");
b7.setText("");
b8.setText("");
b9.setText("");
}
public void compturn()
{
}
public void randomMove()
{
}
}

Welcome to AI... there are numerous ways you can do this. I'll give you a few tips.
I assume count is used to determine who's turn it is. I'd suggest you rather create an integer 'turn' and then simply do this:
turn = 1 -turn
...where you currently increment count. If it's 0 than it's o's turn, else x's. You can then remove those two long if statements. (You can also use a boolean flag and just not it each time, like so turn = !turn.)
Now the rest... I see you have no arrays. Are you comfortable using them?
If so, rather define, winning sequences. For example:
int[][] win = new int[][]{{1,2,3}, {4,5,6}, {7,8,9}, {1,4,7}, ...}
Then all you do to determine if you can win, go is to see if you have two of your tokens in spot win[i][0], win[i][1] or win[i][2]. If the third spot it empty, you can win and should move there,
If you can't win, repeat the above process to defend.
If you do not have to defend and you cannot win, move in the centre. If the centre is taken, take a corner, else move random.
This will give you an AI that can still lose sometimes, but will show some intelligence. If you really want to build something unbeatable have a look at the minimax search algorithm.
Good luck!

Splitting Written code into Two Classes (JAVA)

I'm writing a tic-tac-toe game for my Java, I really suck at this so far, but got it to work with the examples he gave us in class. The problem I'm having now is that I realized wants us to have at least TWO classes for this program. I have no idea what he means by that or how I convert the code I've already put together into "Two Classes". From the instructions it looks like he wants the board in one class and the game in another class.
Is there a way to split this up into two classes without totally re-writing the whole thing?
/* Standard applet template
*/
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import javax.swing.*;
public class TicTacToeGame implements ActionListener {
/*Instance Variables*/
private JFrame window = new JFrame("Tic-Tac-Toe Game");
private JButton btn1 = new JButton("");
private JButton btn2 = new JButton("");
private JButton btn3 = new JButton("");
private JButton btn4 = new JButton("");
private JButton btn5 = new JButton("");
private JButton btn6 = new JButton("");
private JButton btn7 = new JButton("");
private JButton btn8 = new JButton("");
private JButton btn9 = new JButton("");
private JLabel lblTitle = new JLabel("Tic Tac Toe Game");
private JLabel lblBlank = new JLabel(" ");
private String letter = "";
private int count = 0;
private boolean win = false;
public TicTacToeGame(){
/*Create Window*/
window.setSize(400,300);
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setLayout(new GridLayout(3,3));
/*Add Buttons To The Window*/
window.add(btn1);
window.add(btn2);
window.add(btn3);
window.add(btn4);
window.add(btn5);
window.add(btn6);
window.add(btn7);
window.add(btn8);
window.add(btn9);
/*Add The Action Listener To The Buttons*/
btn1.addActionListener(this);
btn2.addActionListener(this);
btn3.addActionListener(this);
btn4.addActionListener(this);
btn5.addActionListener(this);
btn6.addActionListener(this);
btn7.addActionListener(this);
btn8.addActionListener(this);
btn9.addActionListener(this);
/*Make The Window Visible*/
window.setVisible(true);
}
public void actionPerformed(ActionEvent a) {
count++;
/*Calculate Who's Turn It Is*/
if(count == 1 || count == 3 || count == 5 || count == 7 || count == 9){
letter = "<HTML><font color=blue>X</font></HTML>";
} else if(count == 2 || count == 4 || count == 6 || count == 8 || count == 10){
letter = "<HTML><font color=red>O</font></HTML>";
}
/*Display X's or O's on the buttons*/
if(a.getSource() == btn1){
btn1.setText(letter);
btn1.setEnabled(false);
} else if(a.getSource() == btn2){
btn2.setText(letter);
btn2.setEnabled(false);
} else if(a.getSource() == btn3){
btn3.setText(letter);
btn3.setEnabled(false);
} else if(a.getSource() == btn4){
btn4.setText(letter);
btn4.setEnabled(false);
} else if(a.getSource() == btn5){
btn5.setText(letter);
btn5.setEnabled(false);
} else if(a.getSource() == btn6){
btn6.setText(letter);
btn6.setEnabled(false);
} else if(a.getSource() == btn7){
btn7.setText(letter);
btn7.setEnabled(false);
} else if(a.getSource() == btn8){
btn8.setText(letter);
btn8.setEnabled(false);
} else if(a.getSource() == btn9){
btn9.setText(letter);
btn9.setEnabled(false);
}
/*Checks to See Who Won*/
//horizontal win
if( btn1.getText() == btn2.getText() && btn2.getText() == btn3.getText() && btn1.getText() != ""){
win = true;
}
else if(btn4.getText() == btn5.getText() && btn5.getText() == btn6.getText() && btn4.getText() != ""){
win = true;
}
else if(btn7.getText() == btn8.getText() && btn8.getText() == btn9.getText() && btn7.getText() != ""){
win = true;
}
//virticle win
else if(btn1.getText() == btn4.getText() && btn4.getText() == btn7.getText() && btn1.getText() != ""){
win = true;
}
else if(btn2.getText() == btn5.getText() && btn5.getText() == btn8.getText() && btn2.getText() != ""){
win = true;
}
else if(btn3.getText() == btn6.getText() && btn6.getText() == btn9.getText() && btn3.getText() != ""){
win = true;
}
//diagonal wins
else if(btn1.getText() == btn5.getText() && btn5.getText() == btn9.getText() && btn1.getText() != ""){
win = true;
}
else if(btn3.getText() == btn5.getText() && btn5.getText() == btn7.getText() && btn3.getText() != ""){
win = true;
}
else {
win = false;
}
/*Show a dialog if someone wins or the game is tie*/
if(win == true){
JOptionPane.showMessageDialog(null, letter + " WINS!");
} else if(count == 9 && win == false){
JOptionPane.showMessageDialog(null, "Tie Game!");
}
}
public static void main(String[] args){
new TicTacToeGame();
}
}

There are multiple ways to split this class, but since it's not very big, most of them would end up rewriting much of it.
The cleanest way would be to split logic and UI into (at least) two separate classes:
Class TicTacToeGame would implement the logic: it has a method to query who's turn it is, some methods to query the state of the playing field, a method to enter the next move, a method to query the state of the game (playing, end), a method to query who has won and probably a way to register some listeners
Class TicTacToeUI just takes the information of an instance of the other class and displays it. It also calls the appropriate methods when one button is clicked.
The net effect will probably be more code (since the interaction between the two classes will need some code), but the code will be much cleaner and the game class can be tested independently of the UI.

Simple thing you can do is Make second class that implements ActionListener and then use that class to listen to all action events in your program. This is not the way you want that is one for board and one for game but this can be one for operation and one for presentation.

Joachim gave a nice answer. I just want to add that instead of doing this:
/*Display X's or O's on the buttons*/
if(a.getSource() == btn1){
btn1.setText(letter);
btn1.setEnabled(false);
...
} else if(a.getSource() == btn9){
btn9.setText(letter);
btn9.setEnabled(false);
}
You can do this:
JButton btn = (JButton) a.getSource();
btn.setText(letter);
btn.setEnabled(false);

I think your comments are a good hint as to logical splits. Put each section into a separate method so that your actionPerformed method would be something like the following.
public void actionPerformed(ActionEvent a) {
count++;
letter = calculateCurrentPlayer(count);
displayLetterOnButton(a.getSource());
win = checkForWin();
displayGameOver(win, count);
}
Each of the methods called from actionPerformed would then have a small tightly-defined unit of work to perform. These methods could pretty much be copy-and-paste from the sections of your current actionsPerformed method.