"Flash" you can fix. Google the Adobe Flash archives, then scroll down to the latest one for Android 4.X. Load it and it will work with the stock browser. I also have Dolphin browser and it won't work with it. Have heard it will work with FireFox browser but haven't tried it myself. No clue about Java and supposedly, at least according to someone I talked with at Samsung, they have sent the "about blank" problem to Android to get a fix.
Problem is, by the time they get a fix, then send the fix to Sammy and Sammy get's it out to us (if they think we're worthy), I'm old enough I may have assumed "room temperature" by then.