Tic Tac Toe Assignment

Question

Hi, I'm brand new to your website this is my first post. I am currently in a Computer Science class and extremely new to Java. Our teacher gave us an assignment in Java (Eclipse) for Tic Tac Toe. I have the interface built already with Player One being X's and Player Two being O's and everything seems to work out but I have a major problem. When I get a player with 3 in a row I need a line to pop and for a message signify the winner. I have absolutely no idea on how to do this. So if there is anyone out there that would like to give me some guidance I would be greatly appreciated. I will just post my code below. Thank you very much.
package mmr.ics3m1.tictac;
import java.awt.event.ActionEvent;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.WindowConstants;
import javax.swing.SwingUtilities;
public class tictactoe extends javax.swing.JFrame {
     private JLabel lblPlayer1;
     private JLabel lblPlayer2;
     private AbstractAction actionButtonPressed4;
     private AbstractAction actionExit;
     private JButton butExit;
     private AbstractAction actionButtonPressed9;
     private AbstractAction actionButtonPressed8;
     private AbstractAction actionButtonPressed7;
     private AbstractAction actionButtonPressed6;
     private AbstractAction actionButtonPressed5;
     private AbstractAction actionButtonPressed3;
     private AbstractAction actionButtonPressed2;
     private AbstractAction actionButtonPressed;
     private JButton butCell;
     private JButton butCell2;
     private JButton butCell3;
     private JButton butCell4;
     private JButton butCell5;
     private JButton butCell6;
     private JButton butCell7;
     private JButton butCell8;
     private JButton butCell9;
     private Boolean blnPlayer1=true;
     * Auto-generated main method to display this JFrame
     public static void main(String[] args) {
          SwingUtilities.invokeLater(new Runnable() {
               public void run() {
                    tictactoe inst = new tictactoe();
                    inst.setLocationRelativeTo(null);
                    inst.setVisible(true);
     public tictactoe() {
          super();
          initGUI();
     private void initGUI() {
          try {
               setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
               getContentPane().setLayout(null);
                    lblPlayer1 = new JLabel();
                    getContentPane().add(lblPlayer1);
                    lblPlayer1.setText("Player One=X");
                    lblPlayer1.setBounds(28, 17, 110, 36);
                    lblPlayer1.setFont(new java.awt.Font("Segoe UI",3,12));
                    lblPlayer2 = new JLabel();
                    getContentPane().add(lblPlayer2);
                    lblPlayer2.setText("Player Two=O");
                    lblPlayer2.setBounds(245, 24, 83, 19);
                    lblPlayer2.setFont(new java.awt.Font("Segoe UI",3,12));
                    butCell = new JButton();
                    getContentPane().add(butCell);
                    getContentPane().add(getButCell2());
                    getContentPane().add(getButCell3());
                    getContentPane().add(getButCell4());
                    getContentPane().add(getButCell5());
                    getContentPane().add(getButCell6());
                    getContentPane().add(getButCell7());
                    getContentPane().add(getButCell8());
                    getContentPane().add(getButCell9());
                    getContentPane().add(getButExit());
                    butCell.setText("?");
                    butCell.setBounds(28, 65, 59, 40);
                    butCell.setAction(getActionButtonPressed(butCell));
               pack();
               setSize(400, 300);
          } catch (Exception e) {
               e.printStackTrace();
     private AbstractAction getActionButtonPressed(final JButton pcell) {
          if(actionButtonPressed == null) {
               actionButtonPressed = new AbstractAction("?", null) {
                    public void actionPerformed(ActionEvent evt) {
                         if (pcell.getText()=="?")
                              //set square to X or O
                              if (blnPlayer1){
                         pcell.setText("X");
                         blnPlayer1=false;
                    else{
                         pcell.setText("O");
                         blnPlayer1=true;
                    else
                         System.out.println("already taken");
          return actionButtonPressed;
     private JButton getButCell2() {
          if(butCell2 == null) {
               butCell2 = new JButton();
               butCell2.setText("?");
               butCell2.setBounds(150, 65, 59, 40);
               butCell2.setAction(getActionButtonPressed2(butCell2));
          return butCell2;
     private AbstractAction getActionButtonPressed2(final JButton pcell2) {
          if(actionButtonPressed2 == null) {
               actionButtonPressed2 = new AbstractAction("?", null) {
                    public void actionPerformed(ActionEvent evt) {
                         if (pcell2.getText()=="?")
                              //set square to X or O
                              if (blnPlayer1){
                         pcell2.setText("X");
                         blnPlayer1=false;
                    else{
                         pcell2.setText("O");
                         blnPlayer1=true;
                    else
                         System.out.println("already taken");
          return actionButtonPressed2;
          return actionButtonPressed;
     private JButton getButCell3() {
          if(butCell3 == null) {
               butCell3 = new JButton();
               butCell3.setText("?");
               butCell3.setBounds(269, 65, 59, 40);
               butCell3.setAction(getActionButtonPressed3(butCell3));
          return butCell3;
     private JButton getButCell4() {
          if(butCell4 == null) {
               butCell4 = new JButton();
               butCell4.setText("?");
               butCell4.setBounds(28, 116, 59, 40);
               butCell4.setAction(getActionButtonPressed4(butCell4));
          return butCell4;
     private JButton getButCell5() {
          if(butCell5 == null) {
               butCell5 = new JButton();
               butCell5.setText("?");
               butCell5.setBounds(149, 116, 59, 40);
               butCell5.setAction(getActionButtonPressed5(butCell5));
          return butCell5;
     private JButton getButCell6() {
          if(butCell6 == null) {
               butCell6 = new JButton();
               butCell6.setText("?");
               butCell6.setBounds(269, 116, 59, 40);
               butCell6.setAction(getActionButtonPressed6(butCell6));
          return butCell6;
     private JButton getButCell7() {
          if(butCell7 == null) {
               butCell7 = new JButton();
               butCell7.setText("?");
               butCell7.setBounds(28, 161, 59, 40);
               butCell7.setAction(getActionButtonPressed7(butCell7));
          return butCell7;
     private JButton getButCell8() {
          if(butCell8 == null) {
               butCell8 = new JButton();
               butCell8.setText("?");
               butCell8.setBounds(149, 161, 59, 40);
               butCell8.setAction(getActionButtonPressed8(butCell8));
          return butCell8;
     private JButton getButCell9() {
          if(butCell9 == null) {
               butCell9 = new JButton();
               butCell9.setText("?");
               butCell9.setBounds(269, 161, 59, 40);
               butCell9.setAction(getActionButtonPressed9(butCell9));
          return butCell9;
     private AbstractAction getActionButtonPressed3(final JButton pcell3) {
          if(actionButtonPressed3 == null) {
               actionButtonPressed3 = new AbstractAction("?", null) {
                    public void actionPerformed(ActionEvent evt) {
                         if (pcell3.getText()=="?")
                              //set square to X or O
                              if (blnPlayer1){
                         pcell3.setText("X");
                         blnPlayer1=false;
                    else{
                         pcell3.setText("O");
                         blnPlayer1=true;
                    else
                         System.out.println("already taken");
          return actionButtonPressed3;
     private AbstractAction getActionButtonPressed4(final JButton pcell4) {
          if(actionButtonPressed4 == null) {
               actionButtonPressed4 = new AbstractAction("?", null) {
                    public void actionPerformed(ActionEvent evt) {
                         if (pcell4.getText()=="?")
                              //set square to X or O
                              if (blnPlayer1){
                         pcell4.setText("X");
                         blnPlayer1=false;
                    else{
                         pcell4.setText("O");
                         blnPlayer1=true;
                    else
                         System.out.println("already taken");
          return actionButtonPressed4;
     private AbstractAction getActionButtonPressed5(final JButton pcell5) {
          if(actionButtonPressed5 == null) {
               actionButtonPressed5 = new AbstractAction("?", null) {
                    public void actionPerformed(ActionEvent evt) {
                         if (pcell5.getText()=="?")
                              //set square to X or O
                              if (blnPlayer1){
                         pcell5.setText("X");
                         blnPlayer1=false;
                    else{
                         pcell5.setText("O");
                         blnPlayer1=true;
                    else
                         System.out.println("already taken");
          return actionButtonPressed5;
     private AbstractAction getActionButtonPressed6(final JButton pcell6) {
          if(actionButtonPressed6 == null) {
               actionButtonPressed6 = new AbstractAction("?", null) {
                    public void actionPerformed(ActionEvent evt) {
                         if (pcell6.getText()=="?")
                              //set square to X or O
                              if (blnPlayer1){
                         pcell6.setText("X");
                         blnPlayer1=false;
                    else{
                         pcell6.setText("O");
                         blnPlayer1=true;
                    else
                         System.out.println("already taken");
          return actionButtonPressed6;
     private AbstractAction getActionButtonPressed7(final JButton pcell7) {
          if(actionButtonPressed7 == null) {
               actionButtonPressed7 = new AbstractAction("?", null) {
                    public void actionPerformed(ActionEvent evt) {
                         if (pcell7.getText()=="?")
                              //set square to X or O
                              if (blnPlayer1){
                         pcell7.setText("X");
                         blnPlayer1=false;
                    else{
                         pcell7.setText("O");
                         blnPlayer1=true;
                    else
                         System.out.println("already taken");
          return actionButtonPressed7;
     private AbstractAction getActionButtonPressed8(final JButton pcell8) {
          if(actionButtonPressed8 == null) {
               actionButtonPressed8 = new AbstractAction("?", null) {
                    public void actionPerformed(ActionEvent evt) {
                         if (pcell8.getText()=="?")
                              //set square to X or O
                              if (blnPlayer1){
                         pcell8.setText("X");
                         blnPlayer1=false;
                    else{
                         pcell8.setText("O");
                         blnPlayer1=true;
                    else
                         System.out.println("already taken");
          return actionButtonPressed8;
     private AbstractAction getActionButtonPressed9(final JButton pcell9) {
          if(actionButtonPressed9 == null) {
               actionButtonPressed9 = new AbstractAction("?", null) {
                    public void actionPerformed(ActionEvent evt) {
                         if (pcell9.getText()=="?")
                              //set square to X or O
                              if (blnPlayer1){
                         pcell9.setText("X");
                         blnPlayer1=false;
                    else{
                         pcell9.setText("O");
                         blnPlayer1=true;
                    else
                         System.out.println("already taken");
          return actionButtonPressed9;
     private JButton getButExit() {
          if(butExit == null) {
               butExit = new JButton();
               butExit.setText("Exit");
               butExit.setBounds(328, 231, 56, 33);
               butExit.setAction(getActionExit());
          return butExit;
     private AbstractAction getActionExit() {
          if(actionExit == null) {
               actionExit = new AbstractAction("Exit", null) {
                    public void actionPerformed(ActionEvent evt) {
                         System.exit(0);
          return actionExit;
}

Answer 1

Don't forget to use the "Code Formatting Tags", so the posted code retains its original formatting.
http://forum.java.sun.com/help.jspa?sec=formatting
When I get a player with 3 in a row I need a line to pop and for a message signify the winner. Use a JOptionPane. Read the JOptionPane API and you will find a link to the Swing tutorial on "How to Use Dialogs".