Setting borders for JTable cells

How can i create custom / user defined borders for cells in JTable (swing).I need to have borders like only top/bottom,left/right borders for cells. I came to know that it could be possible with paintBorder() method of AbstractBorder interface. But i need a sample code of how it has been done.
Thanks & Regards
M.Shanthakumari

You need to create a custom table cell renderer to do what you are asking. It is what actually draws the cells. Just subclass the DefaultTableCellRenderer and override the getTableCellRendererComponent() method. Look at the source for that class, and just change it to add your logic to use a different border depending on the cell to be drawn.

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the only way you could possibly do this, if you used JEditorPane as a renderer. even then i'm not sure.

Why do borders for some cells allow changes in line thickness, but other cells are locked in only one thickness?

It looks like you should be able to choose different line thickness for cell borders, but for some cells you can get three choices (0.5, 1, 2 pt), but in other cases you can only do 0.5?
I can't make a consistent thickness border around the outside of all my cells!

VS,
Yes, I have lots of ideas. After all that work you probably don't want to hear them.
1. I would use PDF versions of rotated text boxes, inserted into the cells as background Fill rather than floating the actual text boxes over the table.
2. I would never merge a cell, or divide, a cell. Too many problems await you down the road if you do that. There are many ways in Numbers to avoid having to do those things. These are things we must do in Excel to get by, but we don't have to do them in Numbers.
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JTable changing borders for table cells

Hi,
I have a JTable which has columns which each represent a month for a
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Many Thanks in advance,
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You need to create a custom table cell renderer to do what you are asking. It is what actually draws the cells. Just subclass the DefaultTableCellRenderer and override the getTableCellRendererComponent() method. Look at the source for that class, and just change it to add your logic to use a different border depending on the cell to be drawn.

How do I change borders for a cell?

Changing borders seems so easy. I select a cell, select a line type, select a color, select to underline a cell. Problem: It outlines the entire cell! I've tried it a hundred times, but it doesn't change. I must be missing something very simple...

carlfrommichigancity wrote:
Changing borders seems so easy. I select a cell, select a line type, select a color, select to underline a cell. Problem: It outlines the entire cell! I've tried it a hundred times, but it doesn't change. I must be missing something very simple...
Carl,
Do all that, then click off the table to apply the changes. By the way, and I may not need to say this, there is no Underline option. The closest thing is to apply a border style to the lower boundary of the selection.
Jerry

BSP HTMLB TABLE - BORDERS FOR EMPTY CELLS

Hello Colleagues, I'm new to BSP HTMLB, maybe someone could help me.
I’m taking data from a DB table through select and there are a lot empty cells.
The layout looks like:
<htmlb:tableViewColumn columnName="PK_Terms"
<%--wrapping="true"--%>
width="50"
horizontalAlignment = "center"
verticalAlignment = "middle"
fixedColumn="true">
</htmlb:tableViewColumn>
THE BORDER does not APPEAR in empty cells (the table looks horrible), how can I make it appear?

Hi,
If the cell is initial pass the then it will shows the border like when the data is not initial.
i have got this in my requirement.
if it is not shows the any cell pass <border=1>
Regards,
Sri..

GridBagLayout - Question about Creating Borders for Cells

Hello Everyone,
I am implementing a table-like design using a Grid Bag Layout and I do not wish to use a J Table. Since a grid bag layout utilizes cells (rows and columns) to create its' design, I was wondering if any of you knew of a way to create borders for the cells inside of a Grid Bag Layout.
The reason I ask is because, lets say for instance cell (1, 0) may occupy a single J Label. I can easily create a border for this particular cell or label, by calling label.setBorder(). However, what if a single cell occupied two JLabels and they were sort of strangely aligned. I wouldn't be able to call setBorder on the labels anymore because that will just create two separate sets of borders. What I want to do is create a border for that particular cell.
The final result that I want it to look like is almost identical to a J Table where all the rows and columns have separating lines between all the cells. Something similar to this...
http://www.wwffinc.com/other-images/table1-693771.jpg
Thanks in advance!
Brian

However, what if a single cell occupied two JLabels and they were sort of strangely aligned. I wouldn't be able to call setBorder on the labels anymore because that will just create two separate sets of bordersThen create a panel and add the two labels to the panel. Then add the border to the panel.
If you need further help then you need to create a [Short, Self Contained, Compilable and Executable, Example Program (SSCCE)|http://homepage1.nifty.com/algafield/sscce.html], that demonstrates the incorrect behaviour.
Don't forget to use the [Code Formatting Tags|http://forum.java.sun.com/help.jspa?sec=formatting], so the posted code retains its original formatting.

Update JTable cells via setValueAt

Hello all,
I'm trying to implement a setValueAt method using an arrayList.....no success.What listeners should I have set up(For JTable or my table model)? I am new at this and I'm trying to update the JTable cells after a query from some db. Could anyone help?
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"Exception occurred during event dispatching:
java.lang.ClassCastException: java.lang.String
at CachingResultSetTableModel.getValueAt(CachingResultSetTableModel.java:37)
at javax.swing.JTable.getValueAt(JTable.java:1711)
at javax.swing.JTable.prepareRenderer(JTable.java:3530)"
public void setValueAt(Object avalue, int r, int c){
if(r < cache.size()){
row[c] = (Object[])cache.set(r, avalue);
fireTableCellUpdated(r, c);
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*********For reference here's the getValueAt method*************************
public Object getValueAt(int r, int c){
if(r < cache.size()){
row = (Object[])cache.get(r);
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else
return null;
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I would think that everone who starts off with JTable will have a couple of concept problems. I am also going thru this learnig curve. It looks to me ( the blind leading the blind etc) like your basic table has strange data in it. The problem is occuring when the JTable is trying to setup the data from the table model.
I don't think its anything to do with setValueAt.
I kept going back to TableMap, TableSorter and JDBCAdaptor examples and copying the code from them to come right.> I debug by putting a System.out .... in all the methods until I get to where the code is giving trouble.
Good luck [email protected]
Hello all,
>
I'm trying to implement a setValueAt method using an
arrayList.....no success.What listeners should I have
set up(For JTable or my table model)? I am new at
this and I'm trying to update the JTable cells after a
query from some db. Could anyone help?
When trying to change the a value in the table I get
these errors:
"Exception occurred during event dispatching:
java.lang.ClassCastException: java.lang.String
at
CachingResultSetTableModel.getValueAt(CachingResultSetT
bIleModel.java:37)
at javax.swing.JTable.getValueAt(JTable.java:1711)
at
javax.swing.JTable.prepareRenderer(JTable.java:3530)"
public void setValueAt(Object avalue, int r, int c){
if(r < cache.size()){
row[c] = (Object[])cache.set(r, avalue);
fireTableCellUpdated(r, c);
}//setValueAt
*********For reference here's the getValueAt
method*************************
public Object getValueAt(int r, int c){
if(r < cache.size()){
row = (Object[])cache.get(r);
return row[c];
else
return null;
}//getValueAt

How to display cusomized custom tooltip(jwindow) in jtable cell position

Hi,
i am trying to display custom tooltip for jtable cell. i created custom tooltip(jwindow) and on mouseover of jtable cell i am trying to display the custom tooltip.
But it is not display the position of jtable cell. How to display the exact position of jtable cell
please help me on this.

Did you read the posting directly below yours which was also about a custom tool tip?
JScrollableToolTip is buggy
The code presented there shows the tool tip in the proper location.
For more help create a [url http://sscce.org]SSCCE, that demonstrates the incorrect behaviour.
Don't forget to read the "Welcome to the new home" posting at the start of the forum to learn how to use the "code tags" so posted code is formatted and readable.

Border for Excel Cells generated using HTML

Hi,
I am generating html at server side and writing the content with
content type application/xls, all the generated data downloads to
me in excel sheet. Here in this excel document, I dont have borders
for the cell where i dont have the data. But for the cells, where data
is placed, cell borders are available. How do i make the whole excel sheet
cells as bordered.
Thanks in advance.
Regards,
Rizwan.

If I have table border="1" they show up. I want
borders even in other parts of the excel sheet where
table is not there. Is it possible for that to get
the borders in entire excel sheet where data is
present and even if data is not present?IIRC, it would not be possible unless you paint all those borders on the HTML page. An alternate way is to generate the Excel sheet using Jakarta POI, but that would only make your work tougher.

Can I change the border style for normal cell?

Im using Numbers on ipad2. As I say, Im wondering if I can change border style such as its width and colour for ordinary cells which is not a incerted media.
As I know, Numbers only allows the position of borders for normal cells,,, anyone help me?

You only get that when you have two or more consecutive messages. Try to avoid that is one option.
You can change the icon if you want. Create another icon, call it stop.ico and put it in the icons directory (as indicated by UI_ICON). However, if you have a STOP alert, the icon changes for that alert too.
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JTable, cells lost focus

How can I get or listen to event when my cell lost focus ??

The correct answer is to... well, that should be saved for the Swing forum. or alternatively, its in the text for THE FIRST google result for "jtable cell listener".

How to set a cell editable at runtime for jtable

Hi evry body
i need to set a cell as editable during runtime and set some value for the cell and make it non editable after setting value
how can i do it? urgent help appreciated
regards
anil

You could override the methods isCellEditable(...) and setValueAt(...) in your JTable's TableModel to get the effect desired
// Assuming that each element of the array will be false initially
boolean[][] valueSet = new boolean[noRows][noCols];
public boolean isCellEditable(int row, int col) {
return !valueSet[row][col];
public void setValueAt(Object obj, int row, int col) {
super.setValueAt(obj, row, col);
valueSet[row][col] = true;
}

Setting color for cells in a particular column of a jtable

Hi, I know how to set the color for a cell in a column if the cell contains an Integer object and if I have default Integers already in the JTable when I begin. However I want the JTable to look blank at the beginning. As I can't make an Integer object invisible on the JTable I need to specify the colum in which I want the cells to change color in. I want to specify the column some how and then when the table later has Integers in it i can do a comparison to decide whether i want to change the color or not. Does anyone know how I will do this.
Please HELP.

1) You need to set the tooptip text on the renderer for the column (yourTable.getColumnModel().getColumn(...).getHeaderRenderer()).
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Work with JTable cell (check input, set text color)

I have a JTable with data
The task is:
User inputs some data into cell
I want to check his input string for equatily with other values in column
For example, I have these values in column:
1.example
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3.execute
User inputs word "execution" in the same column
until user inputs "executi" his input string should be red.
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Message was edited by:
Holod

i think you should use cell editor as textfield (although that is default for jtable) and then implements document listener and set text color in insert update method.
try this out :-)

Setting borders for JTable cells

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