How to refresh my GUI in connect 4 game

Hi all,
I write an application of a beginner level of connect 4. It has a problem: I cannot reset/refresh the screen after I find a winner or tie. I wonder if someone here can give me a hand.
Thanks.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
public class Connect4GUI extends JFrame
     private final int WIN_WIDTH=500;
     private final int WIN_HEIGHT=500;
     private JFrame frame;
    private JPanel panel_Center;
     private JButton[][] buttonsBoard;
     private int [][] chess;
     private JPanel panel;
    private JButton startButton;
     private JButton rePlayButton;
     private JButton exitButton;
    private static String player1Name;
     private static String player2Name;
     private static final int player1_ID=1;
     private static final int player2_ID=2;
    private String input;
     private boolean gameOver=false;
     private boolean playAgain=false;
     private static int steps=0;
/********************constructor**************************************************/
public Connect4GUI()
     playerInfo();
     showFrame();
     JOptionPane.showMessageDialog(null,"Press Start to start the game.");
public void playerInfo()
     player1Name=JOptionPane.showInputDialog("Player 1 please enter your name.");
     player2Name=JOptionPane.showInputDialog("Player 2 please enter your name.");
public void showFrame()
     setTitle("Connect 4");
     setSize( WIN_WIDTH,WIN_HEIGHT);
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     setLayout(new BorderLayout());
     JPanel panel_North=new JPanel();//show player info
     panel_North.setLayout(new FlowLayout());
     JLabel labelPlayer_1= new JLabel("player 1 is "+player1Name);
     JLabel labelPlayer_2= new JLabel("player 2 is "+player2Name);
     panel_North.add(labelPlayer_1);
     panel_North.add(labelPlayer_2);
     JPanel panel_South=new JPanel();//add several button
     panel_South.setLayout(new FlowLayout());
    //create buttons
     startButton=new JButton("Start");
     rePlayButton=new JButton("Replay");
     exitButton=new JButton("Exit");
    //button listern
     startButton.addActionListener(new myStartButton());
     rePlayButton.addActionListener(new myrePlayButton());
     exitButton.addActionListener(new myexitButton());
    //add buttons to the panel
     panel_South.add(startButton);
     panel_South.add(rePlayButton);
     panel_South.add(exitButton);
     panel_Center=new JPanel();//show the board
    panel_Center.setLayout(new GridLayout(6,7,10,10));//6x7 chess board
     buttonsBoard=new JButton[6][7];
     chess=new int[6][7];
         for (int r=0; r<6;r++)
               for (int c=0;c<7;c++)
                    buttonsBoard[r][c]=new JButton();
                    buttonsBoard[r][c].setBackground(Color.yellow);
                    panel_Center.add(buttonsBoard[r][c]);
                    buttonsBoard[r][c].addActionListener(new mybuttonsBoard());//add actionListener
                chess[r][c]=0;
     }//end for
     //construct the frame
    add(panel_North,BorderLayout.NORTH);
    add(panel_South,BorderLayout.SOUTH);
    add(panel_Center,BorderLayout.CENTER);
     setVisible(true);
}//end showFrame()
public boolean hasAWinner()
   boolean hasAWinner=false;
//win at row
for (int r=0;r<6;r++)
        for(int c=0;(c+3)<7;c++)
                if(chess[r][c]==chess[r][c+1]&&
                    chess[r][c]==chess[r][c+2]&&
                    chess[r][c]==chess[r][c+3]&&
                    chess[r][c]==1)
                         JOptionPane.showMessageDialog(null,player1Name+" is a winner.");
                         hasAWinner=true;
                         return hasAWinner;
               else if(chess[r][c]==chess[r][c+1]&&
                          chess[r][c]==chess[r][c+2]&&
                          chess[r][c]==chess[r][c+3]&&
                          chess[r][c]==2)
                         JOptionPane.showMessageDialog(null,player2Name+ " is a winner.");
                         hasAWinner=true;
                         return hasAWinner;
//win at column
for (int r=0;(r+3)<6;r++)
        for(int c=0;c<7;c++)
                if(chess[r][c]==chess[r+1][c]&&
                       chess[r][c]==chess[r+2][c]&&
                       chess[r][c]==chess[r+3][c]&&
                       chess[r][c]==1)
                         JOptionPane.showMessageDialog(null, player1Name+" is a winner.");
                         hasAWinner=true;
                         return hasAWinner;
                  else if(chess[r][c]==chess[r+1][c]&&
                             chess[r][c]==chess[r+2][c]&&
                             chess[r][c]==chess[r+3][c]&&
                             chess[r][c]==2)
                         JOptionPane.showMessageDialog(null,player2Name+" is a winner.");
                        hasAWinner=true;
                         return hasAWinner;
//win at upleft-to-downright direction
for (int r=0;(r+3)<6;r++)
        for(int c=0;(c+3)<7;c++)
                if(chess[r][c]==chess[r+1][c+1]&&
                       chess[r][c]==chess[r+2][c+2]&&
                       chess[r][c]==chess[r+3][c+3]&&
                       chess[r][c]==1)
                         JOptionPane.showMessageDialog(null, player1Name+" is a winner.");
                         hasAWinner=true;
                         return hasAWinner;
                  else if(chess[r][c]==chess[r+1][c+1]&&
                             chess[r][c]==chess[r+2][c+2]&&
                             chess[r][c]==chess[r+3][c+3]&&
                             chess[r][c]==2)
                         JOptionPane.showMessageDialog(null,player2Name+" is a winner.");
                        hasAWinner=true;
                         return hasAWinner;
//win at downleft-to-upright direction
for (int r=5;(r-3)>=0;r--)
        for(int c=0;(c+3)<7;c++)
                if(chess[r][c]==chess[r-1][c+1]&&
                       chess[r][c]==chess[r-2][c+2]&&
                       chess[r][c]==chess[r-3][c+3]&&
                       chess[r][c]==1)
                         JOptionPane.showMessageDialog(null, player1Name+" is a winner.");
                         hasAWinner=true;
                         return hasAWinner;
                  else if(chess[r][c]==chess[r-1][c+1]&&
                             chess[r][c]==chess[r-2][c+2]&&
                             chess[r][c]==chess[r-3][c+3]&&
                             chess[r][c]==2)
                         JOptionPane.showMessageDialog(null,player2Name+" is a winner.");
                        hasAWinner=true;
                         return hasAWinner;
return hasAWinner;
}//end hasAwinner
public boolean hasATie()
     boolean hasATie=false;
     if(steps==42 && hasAWinner()==false)
                 JOptionPane.showMessageDialog(null,"The game has a a tie.");
                hasATie=true;
                 return hasATie;
        return hasATie;
}//end hasATie
/***********************listener class *******************************************/
private class myStartButton implements ActionListener
     public void actionPerformed(ActionEvent e)
          //JOptionPane.showMessageDialog(null,"Now the game starts.");
          input=JOptionPane.showInputDialog(player1Name+" enter your name and make a move.");//start the game
private class myrePlayButton implements ActionListener
     public void actionPerformed(ActionEvent e)
        if(steps>0)
                    ///how to clear the old frame???
                JOptionPane.showMessageDialog(null,"new game starts.");
                   input=JOptionPane.showInputDialog(player1Name+" enter your name and make a move.");//start the game
             else
                  JOptionPane.showMessageDialog(null,"You haven't started a new game yet.");
}//end myrePlayButton
private class myexitButton implements ActionListener
     public void actionPerformed(ActionEvent e)
                                                      ///how to cancel????????
                      JOptionPane.showMessageDialog(null,"Are you sure you want to stop the game?");
                      if(e.getActionCommand().equals("Exit"))
                          {System.exit(0);}
}//end myexitButton
private class mybuttonsBoard implements ActionListener
     public void actionPerformed(ActionEvent e)
       for (int r=0; r<6; r++)
                 for (int c=0; c<7;c++)
                    if(e.getSource()==buttonsBoard[r][c]
                        &&chess[r][c]==0
                        &&input.equals(player1Name))
                         buttonsBoard[r][c].setBackground(Color.red);
                                   chess[r][c]=player1_ID;
                                        steps++;
                            if(hasAWinner()==true||hasATie()==true)//has a winner or tie
                                         gameOver=true;
                                         repaint();
                                        break;
                           else
                                  input=JOptionPane.showInputDialog(player2Name+
                                      " enter your name and make a move.");
                  else if(e.getSource()==buttonsBoard[r][c]
                           &&chess[r][c]==0
                           &&input.equals(player2Name))
                                buttonsBoard[r][c].setBackground(Color.black);
                                     chess[r][c]=player2_ID;
                                          steps++;
                                     if(hasAWinner()==true||hasATie()==true)//has a winner or tie
                                             gameOver=true;
                                                  break;
                                   else
                                        input=JOptionPane.showInputDialog(player1Name+
                                                        " enter your name and make a move.");
          }//end for
    if(gameOver==true)
                  JOptionPane.showMessageDialog(null,"press Replay to"+
                                     " replay the game or press Exit to exit the game");//replay the game
}//end actionPerformed
}//end class
public static void main(String []args)
          Connect4GUI b=new Connect4GUI();
     }//end main
}//end Board

The problem is solved.

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checked it through Query Builder
:select * from CI_APPOBJECTS where SI_GUID=' DC(DataConnection) GUID' ,
it appears ok, the DCP connection string has been changed.
but the problem is :
when i logon to the infoview or cmc , i find that the information of DCP parameter is still the former one.
(in most cases , it display the old, former con-info, but it also display the correct new data several times )
And if i restart the machine , it will be work ok , infoview will get the latest DCP parameters information.
(related service restarting is of no effect)
how to refresh the latest boe managed information?
Thanks.
Regards,
Jinling.
Edited by: jinling xiang on Nov 18, 2010 10:00 AM
Edited by: jinling xiang on Nov 18, 2010 10:03 AM

Not quite what I meant - I was suggesting you load the entity immediately after reading it from PU_B, or anytime before associating it into PU_A, so before the merge. What you have not shown though is any code on how you are obtaining IntegrationDepartment and integrating it into PU_A, or what you mean by it is returning a refreshed version of Topic. This problem could also be the result of how your provider works internally - this is a TopLink/EclipseLink forum post so I cannot really tell you why you get the exception other than it would be expected to work as described with EclipseLink as the JPA provider.
So the best suggestions I can come up with are prefetch your entity, try posting in a hibernate forum, or try using EclipseLink/TopLink so someone here might be better able to help you with any problems that arise.
Best Regards,
Chris

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