They use Java because it's fast enough, easy, safe, reliable, easy to instrument, easy to debug, has wonderful tool support, is mature, has many tested and heavily used frameworks, has a free chunk of code to do anything you can imagine you can just snag via maven, integrates with everything, works on all major platforms and costs nothing.
They use Java because it's fast enough, easy, safe, reliable, easy to instrument, easy to debug, has wonderful tool support, is mature, has many tested and heavily used frameworks, has a free chunk of code to do anything you can imagine you can just snag via maven, integrates with everything, works on all major platforms and costs nothing.
That makes it fast in other ways.