how to get value from ticked jcheckbox in a row from jtable

Question

I have a table with 3 column and dynamic row based from database value and a jcheckbox in last column based on this code :

  TableColumn tcolumn = tabel.getColumnModel().getColumn(2);
     tcolumn.setCellRenderer(tabel.getDefaultRenderer(Boolean.class));
       tcolumn.setCellEditor(tabel.getDefaultEditor(Boolean.class));

example of my table:

============================================
val 1 || val 2 || val 3 (checkbox) ||
============================================

from FB || from DB || checkbox           ||

from DB || from DB || checkbox           ||

===========================================

My question is simple, how can I get all of the value 1 from the ticked checkbox in column 2 (value 3)?

I tried many simple code but still got an error.

this is my code:

for (int row =0; row <= tabel.getSelectedRowCount(); row++) {
  Boolean b = ((Boolean) tblModel.getValueAt(row, 2));
     if (b.booleanValue()) {
       System.out.print(tblModel.getValueAt(row, 0)+" || ");
    }
  }

Looks like you already had those values in your `String[] fieldData`, now what do you need? — Luiggi Mendoza, Jun 23 '13 at 13:01
if i marked 1st row, it get the value but the output show error. i want to, example : if i marked first row, third row, and 5th row, it get value from their colomn 0. ==> 1011501100,1011501102,1011501104. but it still get error. is my logic in that code wrong ? — MaveRickZ, Jun 23 '13 at 13:09
i got error Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException and the 3rd column absolutelly a boolean value, but it nothing to do/not linking to database, it just a condition, if i ticked, then my logic are run (System.out.print(tblModel.getValueAt(row, 0)+" || ");) — MaveRickZ, Jun 23 '13 at 20:24
You still haven't posted a [SSCCE](http://sscce.org/). That is how you improve a question. That is you show a simple program with a table a button and the code you execute when you click the button. Then maybe we can help explain why your looping logic isn't working. — camickr, Jun 23 '13 at 22:26
@user2512451: As you have complied with Hovercraft's [request](http://stackoverflow.com/q/17264828/230513), I'll hazard a [guess](http://stackoverflow.com/a/17265891/230513). — trashgod, Jun 23 '13 at 22:31

score 1 · Answer 1 · edited May 23 '17 at 12:06

1

It's not clear what error you get or where you get it; I suspect an error casting to Boolean. As general guidance, the default renderer and editor for Boolean.class is a JCheckbox; you shouldn't have to set it explicitly. As shown here, ensure that you observe the following principles for your cast to succeed:

Insert values of type Boolean.class in your TableModel.
Return Boolean.class from getColumnClass() for the relevant column.
Return the desired value from isCellEditable().

edited May 23 '17 at 12:06

Community

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answered Jun 23 '13 at 22:27

trashgod

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@Volatil3: Some examples are seen [here](http://stackoverflow.com/search?tab=votes&q=user%3a230513%20%5bjtable%5d%20DefaultTableModel%20Boolean.class). – trashgod Jul 20 '14 at 01:28

how to get value from ticked jcheckbox in a row from jtable

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