Web-Based Java Compiler Service
TheSync writes "Ronald Tschalär has set up a Web-based Java compiler service. Just type in your source file names and the JDK you'd like to compiler them with (1.1.8,1.2.2,1.3.1 or 1.4.1), and hit "compile." This makes getting started with Java easier, since you don't have to get the whole JDK."
As if you can "compile" java. Everyone knows Java is an interperted language, like Qbasic or Pascal. To run a Java program, you have to put it on a web server, then install the java plugin, then go to the web server and wait several minutes while Java starts up.
Then you can see if your program works or not. Although it might seem locked up, it might just be too slow to tell the difference. Make sure to wait a few seconds after you click a button or do anything, to give the Java time to work.