On these pages, you find various Java projects and Java pages. I have been using Java since its beginning. It was a pleasure most of the time. Java is a mature and stable language, easy to program. The best feature is that it is platform independent. It includes debugging and profiling tools, meaningful exception handling, and there are numerous development IDEs available, among which I have chosen Eclipse. Java comes with a complete library, including multimedia, cryptography, or mathematical routines.
These days, Security problems might prevent the applets on this page to run on your browser. Currently, a simple way to get started is the following: Open the "Java Control Panel" (aka "Java Security") and enter the full site address into the list of sites where applets are allowed. You will still be asked to grant the start of each applet. So there is not much risk.