Is it possible to add a character or a String after the value in a JSpinner
(something like "xxx€", "xxx months", xxx being the value) ?
Check out the section from the Swing tutorial on Specifiying Spinner Formatting.
The default editor of the spinner is a JFormattedTextField
. So you can access this and set your own formatting.
If you have never used a JFormattedTextField before then the tutorial also has a section on How to Use Formatted Text Fields
to help you in creating the mask you want to use.