How to use JButton as a JTable column header?

I'd like to use JButtons as my JTable's column headers.
I built a JButton subclass which implemented TableCellRenderer and passed it to one of my table column's setHeaderRender method. The resulting header is a component that looks like a JButton but when clicked, it does not visually depress or fire any ActionEvents.

You might want to check this example and use it accordingly for your requirements.
http://www2.gol.com/users/tame/swing/examples/JTableExamples5.html
Reason: The reason you're unable to perform actions on JButton is JTableHeader doesn't relay the mouse events to your JButtons.
I hope this helps.
have fun, ganesh.

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Any simple ways for doing this? I am trying to get a filter to a JTable, so that only the rows containing the selected value in that column would be shown.
I first need to get this combobox into the header of a column.

Thanks.
I have already tried with this way, but it was too long and complicated to implement into my file.
Could someone post the principles here.
Like this:
// create my combobox
JComboBox myBox = new JComboBox();
myBox.addItem("Cat");
myBox.addItem("Dog");
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??? ANY CODE HERE ???
Tnx ahead!
OK!
AUlo

How Can I set up a JTable columns?

Dear All,
How can I set up my JTable columns to have the amount the user specifies?
for example when the user types in 50 in JTextField 1 I want the JTables columns to then set to 50.
How can this be done?
Thanks
lol
import javax.swing.*;
import javax.swing.table.TableModel;
import java.io.*;
import java.util.*;
import java.lang.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class si1 extends javax.swing.JFrame implements ActionListener {
    JTextField name = new JTextField(15);
    JTextField name1 = new JTextField(15);
    public si1() {
        super("DataBase Loader");
        setSize(1025,740);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel pane = new JPanel();
        JPanel pane1 = new JPanel();
        JPanel pane2 = new JPanel();
        JPanel pane3 = new JPanel();
        JPanel pane4 = new JPanel();
        pane.setLayout(new GridLayout(20,1));
        pane1.setLayout(new BorderLayout());
        int j=10;
        String[][] data = new String[j][2];
        for (int k=0; k<j; k++){
           String[] row = {"",""};
           data[k] = row;
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        perstab.setPreferredScrollableViewportSize(new Dimension(500,500));
        JScrollPane scrollPane = new JScrollPane(perstab);
        pane1.add(new JPanel(), BorderLayout.EAST);
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        btn.addActionListener(this);
        btn.putClientProperty("DATABASE", perstab);
        pane1.add(new JPanel().add(btn), BorderLayout.SOUTH);
        pane2.add(name);
        pane3.add(name1);
        pane.add(pane2);
        pane.add(pane3);
        pane1.add(pane, BorderLayout.WEST);
        pane4.add(scrollPane);
        pane1.add(pane4, BorderLayout.CENTER);
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lastnames[i] = (String)model.getValueAt(i, 1);
System.out.println("lastname name at row " + i + ": " + lastnames[i]);

As you can see I have tried this, but no success.
If I am doing something wrong please accept my apology, and address me in the right direction.
Thanks
Lol
import javax.swing.*;
import javax.swing.table.TableModel;
import java.io.*;
import java.util.*;
import java.lang.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class si1 extends javax.swing.JFrame implements ActionListener {
    JTextField name = new JTextField(15);
    JTextField name1 = new JTextField(15);
    public si1() {
        super("DataBase Loader");
        setSize(1025,740);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel pane = new JPanel();
        JPanel pane1 = new JPanel();
        JPanel pane2 = new JPanel();
        JPanel pane3 = new JPanel();
        JPanel pane4 = new JPanel();
        pane.setLayout(new GridLayout(20,1));
        pane1.setLayout(new BorderLayout());
        int j=10;
        String[][] data = new String[j][2];
        for (int k=0; k<j; k++){
           String[] row = {"",""};
           data[k] = row;
        String[] columnNames = {"First Name", "Last Name"};
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     ((DefaultTableModel)perstab.getModel()).setColumnCount(Integer.parseInt(name.getText()));
        perstab.setGridColor(Color.yellow);
        perstab.setPreferredScrollableViewportSize(new Dimension(500,500));
        JScrollPane scrollPane = new JScrollPane(perstab);
        pane1.add(new JPanel(), BorderLayout.EAST);
        JButton btn = new JButton("What are the names?");
        btn.addActionListener(this);
        btn.putClientProperty("DATABASE", perstab);
        pane1.add(new JPanel().add(btn), BorderLayout.SOUTH);
        pane2.add(name);
        pane3.add(name1);
        pane.add(pane2);
        pane.add(pane3);
        pane1.add(pane, BorderLayout.WEST);
        pane4.add(scrollPane);
        pane1.add(pane4, BorderLayout.CENTER);
        setContentPane(pane1);
        show();
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        si1 frame = new si1();
        frame.setVisible(true);
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        JTable table = (JTable)((JButton)e.getSource()).getClientProperty("DATABASE");
        TableModel model = table.getModel();
        int count = model.getRowCount();
        String[] firstnames = new String[count];
        String[] lastnames = new String[count];
        for (int i=0; i < count; i++) {
           firstnames[i] = (String)model.getValueAt(i, 0);
            System.out.println("first name at row " + i + ": " + firstnames);
lastnames[i] = (String)model.getValueAt(i, 1);
System.out.println("lastname name at row " + i + ": " + lastnames[i]);

How to use Special value set with Column clause to display addtional column

hi
can anyone tell me
How to use Special value set with Column clause to display addtional column
how can i use FND POPID and with COLUMN clause ?

Dear Yaseen,
To get the value in formula cumulative,after you have created the formula for that particular key figure,go to edit and click on tab "calculations".
In that select overall result as 'count all values not equal to zero' and single result as 'count all values not equal to zero' .
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I hope you get the desired result and please do me favour .
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how do I change the font in a JTable column header?
thanks

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header.setBackground(Color.white);
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PPP
I I I
N N N
1 2 3
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John Roberts
[email protected]

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Hi All,
How to aviod html tags from Report column heading while export to excel.
We used like Employee<br> Department in column heading, but the problem is the <br> tag also exporting into csv file.
If any column data 3/2009 formatt the it will exporting as marh 2009.
Please help on this.
Thanks,
Nr
Edited by: pnr on Jul 5, 2011 5:00 AM

Hi Nr
Here is how I approached this problem.
Go to report attributes tab
under column attributes check PLSQL radio button.
Create a function to return the heading of your report as shown below in your database.
create function get_heading return clob as
v_request VARCHAR2(20) := V('REQUEST');
v_col_heading CLOB;
begin
IF INSTR(v_request,'FLOW_EXCEL_OUTPUT',1) > 0 THEN
v_col_heading := 'Employee Number:Employee Name';
ELSE
v_col_heading := 'Employee breaktag Number:Employee break tag Name';
END IF;
return v_col_heading;
end;
Type the function below under ( Function returning colon delimited headings:) as follows.
return get_heading;
Similarly for data base it on PLSQL function body returning SQL and follow the same approach as headings.
Hope this helps.
Thanks
Sukarna
Edited by: user513776 on Jul 5, 2011 2:24 PM
Edited by: user513776 on Jul 5, 2011 2:27 PM

How to insert a button on the column header of a table in webdynpro java

Hi
Can anyone tell me how to insert a button on the column header of a table in webdynpro java?
regards
sunit

Hi sunit,
Instead of adding button in the column header , in the column
add a fixed top cell.
    right click on the column
    Insert FixedTopCell
    Right click on the fixedTopCell
    insert Editor.
   select button.
then button will be only in the top most row.
Hope it will satisfy ur requirement
Regards
Smitha

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I'm trying to find some information about how to use a JButton within a cell of a JTable. I'm able to insert the button using a custom cell renderer. Basically I create my own renderer which is triggered for JButton.class. That works well.
Of course I do a addActionListener() on the JButton so something will happen when it is pressed.
But the problem is that events aren't getting through to the button at all. The table is getting all the mouse events and is not passing them on.
I'm sure I'm not the first to run into this. Any suggestions on how to get the events to the button, or otherwise deal with this problem?
Thanks

Those example are from 1998. I don't think they work anymore.
Basically, if I could just find a way to get the JTable to send any kind of event to any class that I can write, I would be happy. That would do the trick.
One possibility is to just use a mouse listener, although that seems like a very low-level way to do something which should be at a higher level. But that seems like the only way. Try as I might, I can't find a way to set an editor for these cells.
I used table.setDefaultEditor(JButton.class, myTableCellEditor), and I tried to set it on the column, too, but myTableCellEditor never gets called in response to events.
Any other approaches?
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Hi there,
I am learning JTable. Need help for How to get the selected text from the JTable Column which is set to be editable.
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Minal

Here's an example of the model I used in my JTable. Not the "getValueAt" method & "getRecordAt" method. You will have to have a Record object - but it only contains the attributes of an inserted record (with appropriate getters & setters). Hope this helps.
public class FileModel5 extends AbstractTableModel
public boolean isEditable = false;
protected static int NUM_COLUMNS = 3;
// initialize number of rows to start out with ...
protected static int START_NUM_ROWS = 0;
protected int nextEmptyRow = 0;
protected int numRows = 0;
static final public String file = "File";
static final public String mailName = "Mail Id";
static final public String postName = "Post Office Id";
static final public String columnNames[] = {"File", "Mail Id", "Post Office Id"};
// List of data
protected Vector data = null;
public FileModel5()
data = new Vector();
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public synchronized int getColumnCount()
return NUM_COLUMNS;
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if (numRows < START_NUM_ROWS)
return START_NUM_ROWS;
else
return numRows;
* Returns cell information of a record at location row,column
public synchronized Object getValueAt(int row, int column)
try
FileRecord5 p = (FileRecord5)data.elementAt(row);
switch (column)
case 0:
return (String)p.file;
case 1:
return (String)p.mailName;
case 2:
return (String)p.postName;
catch (Exception e)
return "";
public void setValueAt(Object aValue, int row, int column)
FileRecord5 arow = (FileRecord5)data.elementAt(row);
arow.setElementAt((String)aValue, column);
fireTableCellUpdated(row, column);
* Returns information of an entire record at location row
public synchronized FileRecord5 getRecordAt(int row) throws Exception
try
return (FileRecord5)data.elementAt(row);
catch (Exception e)
throw new Exception("Record not found");
* Used to add or update a record
* @param tableRecord
public synchronized void updateRecord(FileRecord5 tableRecord)
String file = tableRecord.file;
FileRecord5 p = null;
int index = -1;
boolean found = false;
boolean addedRow = false;
int i = 0;
while (!found && (i < nextEmptyRow))
p = (FileRecord5)data.elementAt(i);
if (p.file.equals(file))
found = true;
index = i;
} else
i++;
if (found)
{ //update
data.setElementAt(tableRecord, index);
else
if (numRows <= nextEmptyRow)
//add a row
numRows++;
addedRow = true;
index = nextEmptyRow;
data.addElement(tableRecord);
//Notify listeners that the data changed.
if (addedRow)
nextEmptyRow++;
fireTableRowsInserted(index, index);
else
fireTableRowsUpdated(index, index);
* Used to delete a record
public synchronized void deleteRecord(String file)
FileRecord5 p = null;
int index = -1;
boolean found = false;
int i = 0;
while (!found && (i < nextEmptyRow))
p = (FileRecord5)data.elementAt(i);
if (p.file.equals(file))
found = true;
index = i;
} else
i++;
if (found)
data.removeElementAt(i);
nextEmptyRow--;
numRows--;
fireTableRowsDeleted(START_NUM_ROWS, numRows);
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fireTableRowsDeleted(START_NUM_ROWS, oldNumRows - 1);
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if (headerRenderer instanceof DefaultTableCellRenderer)
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
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* Loads the values into the combo box within the table for post office id
public void setUpPostColumn(JTable mapTable, ArrayList postList)
TableColumn col = mapTable.getColumnModel().getColumn(2);
javax.swing.JComboBox combo = new javax.swing.JComboBox();
int s = postList.size();
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combo.addItem(postList.get(i));
col.setCellEditor(new DefaultCellEditor(combo));
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DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
renderer.setToolTipText("Click for post office Id list");
col.setCellRenderer(renderer);
//Set up tool tip for the mailName column header.
TableCellRenderer headerRenderer = col.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer)
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the Post Office Id to see a list of choices");
}

How to change JTable column header text

How do you set the text in the JTable column headers? I know you can create a JTable specifying the text in an array:
<li>JTable(Object[][] rowData, Object[] columnNames)
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<li>JTable(TableModel dm)
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I'm sure that model allows you to specify header values so you don't have to do so manually. I would be very surprised if it didn't override the default getColumnName() method to provide a reasonable names.She wasn't writing the class, but [url http://forums.oracle.com/forums/thread.jspa?messageID=9200751#9200751]outlining a design for me to implement. And, based on a previous comment I had made, I think she assumed I wanted the new design to look as much like the old as possible. There were no headers in the original design, which wasn't even a table.
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Just decided to add the getColumnName() method. This whole sub-project is based on implementing a clean modern design (and learning about Java Beans). You've clearly stated twice that the method I have implemented is for dynamic header values only, which has already answered what I asked last paragraph.

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wdContext.currentContextElement.set<att3>(it.next().toString);
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LakshmiNarayana

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Hi
I have a requirement to show the picked value as the column header using SQL query.
Example:
======
SELECT EMPNO FROM EMP
WHERE EMPNO=7934;
Result Should be:
7934
7934

I have a requirement to show the picked value as the column header using SQL query.In sql*plus you can do
SQL> set verify on
SQL> def e = 7934
old: SELECT empno "&&e" FROM emp WHERE empno = &&e
new: SELECT empno "7934" FROM emp WHERE empno = 7934
SQL> SELECT empno "7934" FROM emp WHERE empno = 7934
7934
7934
1 row selected.

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