Builders of the upcoming Java 9 platform are setting up what they call a "sandbox forest" as a mechanism to improve collaboration in their efforts.
"The sandbox forest will make open collaboration between OpenJDK developers much easier," said a member of the Oracle technical staff. "The crux of the problem is that the current OpenJDK forests are only able to accept finished work. For some features and patches, it can take weeks or months -- or in a few cases, years -- to produce a finished set of work suitable for contribution to the official OpenJDK repositories. The sandbox forest is a place for the work to live and for developers to collaborate before a contribution is finalized."