Need help with advanced JTable

The application I am converting to Java has a string grid (table) with special behavior that I need to be able to bring to the Java version. It let's users filter the column data (that I know how to do) using a locked first row (just below the column header) that always stays in place and that shows what filter is applied to each column (by showing a combo box).
I usually write server apps and have only been trying to grasp Swing for about a week, and I find myself stuck :(
Is this at all possible in Java? If not, can I make the header respond to mouse events and show a popup menu for each column? If so how?
Please help!

I have made an attempt as follows (to show where I am stuck).
I have two TableModels that contain rows and data;
a) the grid data that's coming from our EJB session facade
b) the filter settings (a String[] with initially empty strings) which show what filter is used for each column.
The two table models are shown in two tables that share a common TableColumnModel so that whenever i move or resize a column both tables are updated.
The filter table shows it's header and the row of empty cells. The Table Model I've used for it is ripped from the Sorted Table example from Sun, so that I can capture mouse events, set the sort order for each column and notify the grid table that it needs to update accordingly.
I attempted to use the filter table as a header view in a JScrollPane, which would keep it in place all the time while the user would be able to scroll and resize the grid table.
This is where I fail - I can't even get it to show up in the header. And if I only put the two tables on a JPanel it seems impossible to get them to stick together when the pane is resized (aside from the fact that I no longer can capture the mouse events).
I'd be happy to send someone the code fragments if you think you have a solution to this - that will allow users to resize, edit and move columns in a table where you initially have no clue as to how many columns it will contain.
Please please continue to help me :)

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chieffan wrote:
> I am stuck on a query and hope someone can help me out
with it. Basically I am
> trying to get the average score by team who has competed
in four or more events.
>
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>
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- This is on-line page http://caite.cs.umass.edu/students/index.html
If you want code from template here it is:
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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
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<title>CAITE - Commonwealth Alliance for Information Technology Education</title>


<meta name="Description" content="Commonwealth Alliance for Information Technology Education (CAITE) to design and carry out comprehensive programs that address under representation in information technology (IT) education and the workforce. CAITE will focus on women and minorities in groups that are underrepresented in the Massachusetts innovation economy" />
<meta name="Keywords" content="Commonwealth Alliance for Information Technology Education CAITE Massachusetts women minorities information technology IT" />
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<p><a href="../Library/contact/index.html">Contact Us</a></p>
</div>
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                <div id="navigation_r"> <ul>
                        <li><a href="../index.html" class="first"><img src="../images/spacer.gif" alt="CAITE Homepage" width="75" height="20" border="0" /></a></li>
                        <li><a href="../about/index.html">About</a></li>
<li><a href="../news/index.html">News And Events</a></li>
<li><a href="../educators/index.html">For Educators</a></li>
<li><a href="../students/index.html">For Students</a></li>
<li><a href="../industry/index.html" class="last">For Industry</a></li>
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                    <div id="internalBanner-print"> <h1>Commonwealth Alliance for Information Technology Education (CAITE)</h1></div>
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                                  <p>CAITE designs and carrys out comprehensive programs that address under-representation in information technology (IT).</p>
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                              <p>The University of Massachusetts Amherst is leading a Commonwealth Alliance for Information Technology Education (CAITE) to design and carry out comprehensive programs that address under representation in information technology (IT) education and the workforce. CAITE will focus on women and minorities in groups that are underrepresented in the Massachusetts innovation economy; that is, economically, academically, and socially disadvantaged residents.</p>
                              <p>The project will pilot a series of outreach programs supported by educational pathways in three regions (one rural, one suburban, and one urban). The project will include work with high school teachers, staff, and counselors. CAITE will identify best practices and disseminate, deploy, extend and institutionalize these best practices statewide and nationally.</p>
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    </div>
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<p>Sponsored by CAITE an NSF CISE Broadening Participation in Computing Alliance<br />
© copyright 2008 <a href="http://www.umass.edu/" target="_blank">University of Massachusetts, Amherst</a></p>
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</font>
<p><font color="#666666" size=2> This material is based upon work supported by the National Science Foundation under Grant No.s NSF-0634412 and NSF-0837739. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.</font> </p>
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Here is your problem:
public void actionPerformed(ActionEvent e){
int tal1 = Integer.parseInt(t1.getText().trim()); // add the trim()
int tal2 = Integer.parseInt(t2.getText().trim()); // add the trim()
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}Message was edited by:
abillconsl

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i need help with my program here. this one should works as:
- saves user input into a txt file
- displays name of the saved person on the jlist whenever i run the program
- displays info about the person when clicked via textboxes given by reading the txt file where the user inputs are
- should scroll when the list exceeds the listbox
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.JList;
import java.awt.event.ActionListener;
import java.io.*;
import javax.swing.event.*;
import java.io.FilterInputStream;
public class AddressList extends JPanel implements ActionListener
     JTextField txt1 = new JTextField();
     JTextField txt2 = new JTextField();
     JTextField txt3 = new JTextField();
     DefaultListModel mdl = new DefaultListModel();
     JList list = new JList();
     JScrollPane listScroller = new JScrollPane(list);
     ListSelectionModel listSelectionModel;
     File fob = new File("Address3.txt");
     String name;
     char[] chars;
     public void ListDisplay()
          try
               RandomAccessFile rand = new RandomAccessFile(fob,"rw");
               BufferedReader br = new BufferedReader(new FileReader("Address3.txt"));
               if(fob.exists())
                     while((name = rand.readLine()) != null)
                          chars = name.toCharArray();
                          if(chars[0] == '*')
                               mdl.addElement(name);
                               list.setModel(mdl);
                          if(chars[0] == '#')
                               continue;
                else
                    System.out.println("No such file..");
          catch(IOException a)
                     System.out.println(a.getMessage());
     public AddressList()
          this.setLayout(null);
          listSelectionModel = list.getSelectionModel();
        listSelectionModel.addListSelectionListener(new ListInfo());
          list.setBounds(10,40,330,270);
          listScroller.setBounds(320,40,20,100);
          add(list);
          add(listScroller);
          JLabel lbl4 = new JLabel("Name: ");
          lbl4.setBounds(400,10,80,30);
          add(lbl4);
          JLabel lbl5 = new JLabel("Cellphone #: ");
          lbl5.setBounds(400,50,80,30);
          add(lbl5);
          JLabel lbl6 = new JLabel("Address: ");
          lbl6.setBounds(400,90,80,30);
          add(lbl6);
          JLabel lbl7 = new JLabel("List ");
          lbl7.setBounds(10,10,100,30);
          add(lbl7);
          txt1.setBounds(480,10,200,30);
          add(txt1);
          txt2.setBounds(480,50,200,30);
          add(txt2);
          txt3.setBounds(480,90,200,30);
          add(txt3);
          JButton btn1 = new JButton("Add");
          btn1.setBounds(480,130,100,30);
          btn1.addActionListener(this);
          btn1.setActionCommand("Add");
          add(btn1);
          JButton btn2 = new JButton("Save");
          btn2.setBounds(480,170,100,30);
          btn2.addActionListener(this);
          btn2.setActionCommand("Save");
          add(btn2);
          JButton btn3 = new JButton("Cancel");
          btn3.setBounds(480,210,100,30);
          btn3.addActionListener(this);
          btn3.setActionCommand("Cancel");
          add(btn3);
          JButton btn4 = new JButton("Close");
          btn4.setBounds(480,250,100,30);
          btn4.addActionListener(this);
          btn4.setActionCommand("Close");
          add(btn4);
     public static void main(String[]args)
          JFrame frm = new JFrame("Address List");
          AddressList panel = new AddressList();
          frm.getContentPane().add(panel,"Center");
          frm.setSize(700,350);
          frm.setVisible(true);
          panel.ListDisplay();
     public void actionPerformed(ActionEvent e)
          String cmd;
          cmd = e.getActionCommand();
          if(cmd.equals("Add"))
               txt1.setText("");
               txt2.setText("");
               txt3.setText("");
          else if(cmd.equals("Save"))
               mdl.addElement(txt1.getText());
               list.setModel(mdl);
               try
               RandomAccessFile rand = new RandomAccessFile(fob,"rw");
               BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
               LineNumberReader line = new LineNumberReader(br);
                if(fob.exists())
                          rand.seek(fob.length());
                          rand.writeBytes("* " + txt1.getText());
                          rand.writeBytes("\r\n" + "# " + txt2.getText());
                          rand.writeBytes("\r\n" + "# " + txt3.getText() + "\r\n");
                else
                     System.out.println("No such file..");
                    txt1.setText("");
                    txt2.setText("");
                    txt3.setText("");
                catch(IOException a)
                     System.out.println(a.getMessage());
          else if(cmd.equals("Cancel"))
               txt1.setText("");
               txt2.setText("");
               txt3.setText("");
          else if(cmd.equals("Close"))
               System.exit(0);
class ListInfo implements ListSelectionListener
     public void valueChanged(ListSelectionEvent e)
          ListSelectionModel lsm = (ListSelectionModel)e.getSource();
          int minIndex = lsm.getMinSelectionIndex();
        int maxIndex = lsm.getMaxSelectionIndex();
          try //*this one should display the info of the person whenever i click the person's name at the list box via textbox.. but i cant seem to get it right since it always display the info of the first person inputed.. i tried to get the program to display them whenever it reads lines with * on them....
               File fob = new File("Address3.txt");
               RandomAccessFile rand = new RandomAccessFile(fob,"rw");
               BufferedReader br = new BufferedReader(new FileReader("Address3.txt"));
               LineNumberReader line = new LineNumberReader(br);
               if(fob.exists())
                          for(int i = minIndex; i<=maxIndex; i++)
                               if(lsm.isSelectedIndex(i))
                                    while((name = rand.readLine()) != null)
                                         chars = name.toCharArray();
                                         if(chars[0] == '#')
                                              continue;
                                         if(chars[0] == '*')
                                              txt1.setText(rand.readLine());
                                             txt2.setText(rand.readLine());
                                             txt3.setText(rand.readLine());
                else
                          System.out.println("No such file..");
          catch(IOException a)
                     System.out.println(a.getMessage());
}the only problem now is about how it should display the right info about the person whenever i click its name on the list.. something about file reading or something, i just cant figure it out.
and also about how to make it scroll once it exceeds the list.. i cant make it work, maybe something about wrong declaration..
thanks in advance..
Edited by: syder on Mar 14, 2008 2:26 AM

Like said before, do one thing at a time. At startup, something like:
//put all the content in a list
ArrayList<String> lines = new ArrayList<String>();
while(String line=rand.readLine()!=null) {
    lines.add(line);
}If you follow the good advice to create a class to encapsulate the entries, you could populate a list of such entries like this:
static final int ENTRY_SIZE = 3;//you have 3 fields now, better to have a constant if that changes
ArrayList<Entry> entries = new ArrayList<Entry>();
for(int i=0; i<lines.size(); i+=ENTRY_SIZE) {
    Entry entry = new Entry(lines.get(i), lines.get(i+1), lines.get(i+2);
    entries.add(newEntry);
}You could also do both of the above in one run, but I think you will understand better what's happening if you do one thing at a time.
If you don't want to put the entries in an encapsulating class, you can still access this without looping:
int listStartIdx = <desired_entry_index>*ENTRY_SIZE;
String att1 = lines.get(listStartIdx).substring(1);
String att2 = lines.get(listStartIdx+1).substring(1);
String att3 = lines.get(listStartIdx+2).substring(1);

Need help with Installing Canon LBP 2900B on Macbook Pro OSX 10.6.8

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Have searched all the forums and followed all discussion threads on the Apple Communities as well, but none of the solutions seem to work. Even went back to @Dexter's solution with trying to download the file from the link http://boolet.free.fr/CAPT.zip (this is what I had done when I bought the printer, and it worked perfectly) but the link doesn't exist anymore.
Extremely grateful if anyone can put up a solution to this, or alternatively, IF ANYONE HAS THE OLD CAPT.ZIP FILE AND CAN UPLOAD IT.
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I need help with event structure. I am trying to feed the index of the array, the index can vary from 0 to 7. Based on the logic ouput of a comparison, the index buffer should increment ?

I need help with event structure.
I am trying to feed the index of the array, the index number can vary from 0 to 7.
Based on the logic ouput of a comparison, the index buffer should increment
or decrement every time the output of comparsion changes(event change). I guess I need to use event structure?
(My event code doesn't execute when there is an event at its input /comparator changes its boolean state.
Anyone coded on similar lines? Any ideas appreciated.
Thanks in advance!

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There are many examples of State Machines within this forum.
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I need help with APEX.
Here's my situation:
I have a report that displays brief employee information. Among the information displayed is the Address. Right now, it's display as:
Mr X
Employee Id
Accounting Department
Address 1
Mr X
Employee Id
Accounting Department
Address 2
I would like it to display
Mr X
Employee Id
Accounting Department
Address 1
Address 2
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2) Stragg functions - I'm not sure how to implement it since it has more than 1 columns.
Any ideas?
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Now, you are saying:
1. some of the employees may have two adresses?
2. if this is the case, your employee appears in the report twice?
3. you don't want his name, employee id and accounting department to appear twice?
4. only his address has to be displayed?
If the answer to all the questions is yes, this kind of query will help you. I repeat:
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