Oracle’s lawsuits, esp copyrightable API’s, makes me default on staying away from anything they make. I’d leave any platform they acquire, too. There’s many open platforms whose owners or backers aren’t as aggressive in lawsuits as Oracle is. Many have strong communities of contributors, too.

The only reason I’d use or contribute to Oracle I.P. is if I was paid to do so. The other is porting off Java but that’s legally risky if minima changes. CPAChecker was the one I was thinking of. Past that, I’d try to avoid Java.