What?
Do you realize how far Java reaches into the enterprise?
And with Swift's focus still being around the walled garden of iOS/OSX development, even with the open sourcing there are many more "IFs" to achieve before Swift rivals Java in adoption.
Don't get me wrong. I don't use Java and I have made apps for iOS (though not with Swift yet unfortunately). I like Swift and intend on trying it. But rivaling Java? Certainly no time soon.