JScreenSaver is the middleware to make a screen saver for Windows in Java language. JScreenSaver itself is being written in the Java language and the C++ language. JScreenSaver starts the screen saver which you wrote in Java language.
J2SE 1.4.0 later.
Jeenie is a Win32 screensaver written in Java and C. It depends on a Java 2 Runtime Environment and provides base screensaver support. You can use it to develop your own private or corporate screensaver without the need for a fully blown C++/MFC environm