Coming from Windows and .NET development world, I'm trying to migrate to Ubuntu 12.10 and JAVA development world but I'm getting very confused about:
What is the most standard form to install JAVA EE JDK? Should I download and run the shell script from Oracle, use the packages at WebUpd8 PPA or install the OpenJDK packages?
What are the differences between Oracle's JAVA and OpenJDK's JAVA? Can I think of them as like Microsoft's .NET and Mono Project's .NET?
I've installed Oracle's JAVA using the shell scripts but how can I get the browsers to run JAVA Applets? I've installed IcedTea Java Plugin but i'ts working only in some sites, others are halting Firefox.
By the way, what exactly are the IcedTea Java Plugin? It's a JAVA runtime implementation by its own or it is using the Oracle's JAVA that 'ive installed like some kind of bridge to teach the browser how to get to the runtime?
This transition isn't easy as I expected. Afff! I appreciate any help!