Jakoub,
This is what I would like you to try:-
1. Download the xframe-swing-0.6.zip from the following link:-
https://sourceforge.net/project/showfiles.php?group_id=48863&package_id=125567
2. Extract it to folder called “xframe-swing-0.6”. You should have a file called “xframe-swing-0.6.jar” extracted from this archive file.
3. Add the “xframe-swing-0.6.jar” which you extracted to your projects build path.
4. Go to Manage Palette > Add Widget and type JxTable in the search box. The JxTable should show up. Add it to your palette. It should show up under “Custom”.
5. Right click on your form and go to Add from Palette > Custom > JxTable.
Did this work for you ?