[twic]

It's GPL 2, with an exception which lets you distribute binaries containing your own code linked to the JDK without having to provide the source to your own code (see '"CLASSPATH" EXCEPTION TO THE GPL' at the end):

https://github.com/openjdk/jdk/blob/master/LICENSE

This is substantially the same as the GCC Runtime Library Exception, which lets you distribute GCC-compiled binaries linked to the GCC runtime without having to provide the source.

That's it.

[javajosh]

Thanks. During this discussion I found the OpenJDK source code, cloned the repo, and build a fully-functional JDK [1]. Presumably the license forces me to share modifications to the JDK code itself, but not to any application I run on the JDK.

If I wanted to distribute my JDK (I don't, BTW) what limits are there? Do I need to get certified? Run compatibility tests? Pay a fee to Oracle? Or do I just need to plop a binary on Github or S3 and call it a day?

1 - https://openjdk.java.net/groups/build/doc/building.html