JVM loads slowly

I'm an amateur developer who's been trying to learn Java because I've heard a lot of good things about Java on the Mac, making me question my bad experiences with Java on Macs.
Any time I try to start a Java app, there is a 3-4 minute delay between the time I activate it and the time the icon appears in the application switcher (the thing that pops up when you hit Apple-Tab). During this time the icon appears in the Dock without a black triangle underneath. Java applets take a similar amount of time to load (so I'm now intimately familiar with the coffee cup Icon), as does javac at the command line. This startup time, however, is only for the first time I run any Java application or javac; it's much shorter the second time. The only thing that doesn't take this much time to load is OpenOffice under X11.
My hypothesis is that JVM startup time is causing this load. Is this just an inherent problem with the way the JVM is implemented in OSX, or is this just a quirk on my system? If it's a problem with my setup, any suggestions for what I can do? Could it be the fact that I have too many old versions of Java on my computer?
14" iBook G4 Mac OS X (10.4.9)

Hi fractals
Before we go any further we need to find out which version of Java is causing the problem. In the Terminal program, type "java -version" (without the quotes) and observe the behaviour. Hopefully, you'll get the long delay you mentioned earlier, but it will eventually print out the java version. This should serve to identify exactly which Java version has the problem. If you don't get the long delay, or it hangs without ever printing out the version then you need to follow these steps. In Terminal type:
cd /System/Library/Frameworks/JavaVM.framework/Versions/1.3/Commands
./java -version
cd /System/Library/Frameworks/JavaVM.framework/Versions/1.4/Commands
./java -version
cd /System/Library/Frameworks/JavaVM.framework/Versions/1.5/Commands
./java -version
(you can cut and paste these commands from here)
With any luck this will identify the faulty Java version. Come back when you know which one it is.
Bob

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