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Need Clarification on Different Java Package/Technology?

 
David Yu
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Hi everyone,

One of the biggest confusion I have with Java is that Java has so many different technologies and so many different packages. There are JRE, JDK, JEE and it appears that they each support different libraries and classes.

Does anyone know any online resource that provides a clarification and summary of each?

That will be extremely helpful. Thanks!
 
David Yu
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Let me add to the topic so that it's more specific. Assuming that I want to use RMI or use JDBC, how do I know which technology or package to use?
 
Jesper de Jong
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The JDK documentation has a pretty good overview of all of it. Note that in the picture at the top of the page you can click on the words and you'll go to a page that explains that particular technology.

For Java EE, look at the Java EE 5 documentation.
 
Stan James
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You are right - there is an overwhelming amount of good stuff built up around Java, from Sun and open source and commercial companies and more. Just the Sun parts are enough to keep you busy a good long while.

I often Google for "Sun <something> tutorial" and almost always get something good. As an example, try it with RMI and see what you get. If you don't find a topic at Sun, try "java <something> tutorial" and you'll often hit articles or university class notes ... quality is less consistently good but they often have hints in the right direction.
 
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