Right-click on your project in the Package Explorer and select Properties .
Navigate to the Toedter website (the developer of JCalendar).
📅 Always ensure you include the jcalendar JAR when exporting your project as a Runnable JAR, or your application will crash when it tries to load the calendar components.
WindowBuilder will scan the JAR. Select the components you want to use, such as JDateChooser , JCalendar , and JMonthChooser .
