Update string table from continious reading "*.txt" file

Hello community ,
I read a txt file continiously and try to catch the next data written each time the txt file is modified. My problem is that I can't use an event structure inside the while loop to catch the new data written.
So the process write new data in the txt file line per line without erasing previous data like this:
data1
data2
data3
etc....
I just want to catch the new data writen when it's written.
Thank for any inputs......
Attachments:
zip.zip ‏11 KB

What you are doing is basically what you have to do, you must poll the file somehow. If you have an event structure you can always use the timeout event to time the polling.
The only other workaround would depend on the producer of the data file. If it is a LabVIEW program you cna make it send the consumer VI an event telling it to read. Although at that point I would just have it send the data.

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[Rules of engagement|http://wiki.sdn.sap.com/wiki/display/HOME/RulesofEngagement]
[Asking Good Questions in the Forums to get Good Answers|/people/rob.burbank/blog/2010/05/12/asking-good-questions-in-the-forums-to-get-good-answers]
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     String exit = "Exit";
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My problem is that I�m reading a .txt-file into a J-Table. It all goes okay, the FileChooser opens and the application reads the selected file (line). But then I get a Null Pointer Exception and the JTable does not get updated with the text from the file.
Here�s my code (I kept it simple, and just want to read the text from the .txt-file to the first cell of the table.
A MORE READABLE VERSION !
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.util.*;
import java.lang.*;
import java.io.*;
public class TeamTable extends JFrame implements ActionListener, ItemListener                {
static JTable table;
     // constructor
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        super( "Invoermodule - Team Table" );
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          // setting the rownames
        ListModel listModel = new AbstractListModel()                     {
            String headers[] = {"Team 1", "Team 2", "Team 3", "Team 4", "Team 5", "Team 6", "Team 7", "Team 8", "Team 9",
            "Team 10", "Team 11", "Team 12", "Team 13", "Team 14", "Team 15", "Team 16", "Team 17", "Team 18"};
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          int[] vColIndex = {0,1,2};
          String[] ColumnName = {"Name Team", "Name Chairman", "Name Manager"};
          TableCellRenderer centerRenderer = new CenterRenderer();
          for (int i=0; i < vColIndex.length;i++)          {
                         table.getColumnModel().getColumn(vColIndex).setHeaderValue(ColumnName[i]);
                         table.getColumnModel().getColumn(vColIndex[i]).setPreferredWidth(width);
                         table.getColumnModel().getColumn(vColIndex[i]).setCellRenderer(centerRenderer);
          table.setFont(new java.awt.Font("Dialog", Font.ITALIC, 12));
          // force the header to resize and repaint itself
          table.getTableHeader().resizeAndRepaint();
          // create single component to add to scrollpane (rowHeader is JList with argument listModel)
          JList rowHeader = new JList(listModel);
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          JMenuBar menubar = new JMenuBar();
          setJMenuBar (menubar);
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          JMenuItem open = new JMenuItem("Open");
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Update string table from continious reading "*.txt" file

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