How to know if I am using Java EE?

Question

Today I installed Java EE by downloading the .sh file from the official Oracle source and running it using the sudo sh filename.sh command.

However, I have several versions of Java in my Linux Mint machine, which I access when using the command sudo update-alternatives --config java :

There are 2 choices for the alternative java (providing /usr/bin/java).

  Selection    Path                                            Priority   Status
------------------------------------------------------------
  0            /usr/lib/jvm/java-7-oracle/jre/bin/java          1074      auto mode
  1            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1071      manual mode
* 2            /usr/lib/jvm/java-7-oracle/jre/bin/java          1074      manual mode

Press enter to keep the current choice[*], or type selection number: 

And when I use the java -version command, this is what I get:

$ java -version
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)

By reading all these outputs, I never find anything mentioning any "Java EE" version. So I have some questions I need clarification with:

1. How do I really know if I am using it as a default?
2. If I am not using it by default, how can I do it?
3. If the above steps are not possible, how do I just set my Eclipse IDE to use it?

Thanks in advance, Pedro.

Answer 1

Java EE is not a replacement for Java SE, it's a set of APIs and services on top of Java SE. Or in Oracle's own words:

The Java EE platform is built on top of the Java SE platform. The Java EE platform p rovides an API and runtime environment for developing and running large-scale, multi-tiered, scalable, reliable, and secure network applications.

What you downloaded here is an Oracle Glassfish server (the reference implementation of Java EE - its own site can be found here ) with a bundled JDK (which you won't need because you already had Java SE installed). Doesn't look that fresh to me with its bundled jdk7u10...

Java EE is quite comprehensive and big, the official tutorial is a very impressive book with 1010 pages.