Java SE 是 Java EE 的先决条件吗？

Question

I am very new to programming and I am using Java as my first Programming Language. I am already using Java with Java SE for almost a week and I read something about Java EE and if I understood it correctly, Java EE = Java SE + other features, so I think I have to change my SDK to Java EE to save disk space.

I read the installation instructions about Java EE and it says there that its OK to have them both but I really wanted to have just Java EE. I uninstalled Java SE and installed Java EE but I was having some errors along the way and I can't continue installing Java EE. I can't remember what the errors were but I decided to cancel the installation. I installed Java SE again and installed Java EE and everything went smoothly. Now, I have both...

I am using JCreator 5 as my IDE and I configured it to use the Java EE jdk only. I tried to compile my test program but it seems that it cannot recognize it. How can I make my Java EE work without having Java SE.

I don't know whats going on. I am totally new to this. I just wanted to use J2EE... Please help.

Java SE is in C:\Program Files\Java while Java EE is in C:\Sun\AppServer

Answer 1

Java EE is defined by its specification and its specification is built on top on the Java SE classes. Java EE classes will call Java SE classes, so you cannot use the Java EE without the installation of Java SE. Otherwise, you will encounter the java.lang.NoClassDefFoundError

Answer 2

Java EE classes are defined over Java SE classes, so you need to install Java SE, first.

Happy learning!