Is java installed on your system? when you install JRE(not JDK) it will ask you to select various browsers installed on your system.If you select those browsers, you will not get the java cup next time.
I hate to berate Mac, Im on MacBook Pro with Leopard myself, but, Safari (4 beta and 3) sometimes has problems loading Applets. However on Tiger, you should have java installed by default (Fire up Terminal and type java -version that should check your runtime, and then try javac -version and that should tell you if you have the JDK installed (although this is not needed to run Applets on the web, you will need it to write Java programs). If you still have issues with Safari, try using Firefox, it seems to work a bit better with Applets.
be a well encapsulated person, don't expose your privates, unless you public void getWife()!