For questions about programming using the Java UI toolkit (javax.swing).
For questions about developing using Spring Framework, an open-source framework for application development on the Java
For questions about the SimpleDateFormat class which deals with data and time parsing and conversion operations.
For questions related to using javac, the primary Java compiler, included in the Java Development Kit (JDK).
For questions about OpenJDK (Open Java Development Kit), a free and open source implementation of the Java Platform,