javax vs java package

Question

What\'s the rationale behind the javax package? What goes into java and what into javax?

I know a lot of enterprise-y packages are in javax, but so is Swing, the new

Answer 1

java.* packages are the core Java language packages, meaning that programmers using the Java language had to use them in order to make any worthwhile use of the java language.

javax.* packages are optional packages, which provides a standard, scalable way to make custom APIs available to all applications running on the Java platform.