Guys, really Javier isnt that hard! even in hard only the white shield at the last bits of his health is whats annoying, you just should try to use "L" & jump alot, then return to him fast to do some "Circle" combo's
I agree, rolling and circle combos with 3x square combos chew him up. What I would do was position myself in the corner and wait for the M.Bison Psycho crusher type move and jump over it, break the shield and combo away. I would also wait for the vertical spin roll move to land on the ground, roll through the 'waves' it creates, and then break the shield. All of the moves he does can be rolled through except for the psycho crusher move, and the vertical jaguar volcano thing.
It's a fun fight, the thing that really irked me was I beat him the first time with a thread of life, but the game froze afterwards and I had to do it again. It gets easier though.