Question

I recently read the blog posts on Pushing Pixels that describe how to achieve native transparency and translucency with pure Java. The needed classes reside on com.sun.awt namely com.sun.awt.AWTUtilities.

I was wondering how i could include the needed classes (not just this one) into my distro since the classes are available only when you have a jdk installed and you start the jvm through there. So the users of my program will not have the needed classes to run my program.

Any ideas?

Answer 1

AWTUtilities, as the package implies is an implementation package and is subject to change. I don’t think it is a good idea to distribute the class from both technical and legal viewpoints.

Technically, com.sun.awt.AWTUtlities is bound to have possibly unknown dependencies on other classes and internal implementation details, specific to Java 6 u10 and above (the release in which it appeared). This unknown dependency angle is bound to hold water, since painting and graphics will require changes in some of the native implementations as well.

Secondly, this is bound to change in Java 7, since the only release Sun hasn’t made a release of java.awt.AWTUtilities with support for transparency, is because they do not make changes to public APIs except in major releases.

IANAL, but I do not think it is wise to engage in the act of redistributing software without having run past a lawyer. Besides, customers do not like the idea of having an unsupported deployment of any software in their systems.

Update

All Sun JREs (not just JDKs) from 6u10 onwards come with com.sun.awt.AWTUtilities, so the simplest course of action would be to get your users to have Java 6u10 or later on their systems, and for your application to handle any resulting exception gracefully.