Well, we can still play those java games on sgy, but not all. You can download this tweak so that it can program the phone to run the 2D games or the .jar games on our phone.
Just follow my steps and please read terms and conditions first.
- Place it on root of sd card
- turn off phone and then boot to stuck recovery CWM (power+volume up+home key)
- select update from zip
- choose the .zip file
- reboot and play java games
Don't get frustrated if a game doesn't run. Not all games are able to run. Just test.