hey guys..i m building a motion detector in java....the problem is this, i have two bufferedimages from webcam...these are consecutive images taken from webcam...i need to compare these two images to check for any changes....i have no idean how to do this...i m trying getRGB() method for this purpose but i think i m not correctly applying it.... so if anyone have any idea how to do this..plzz reply...

i m working on a rpoject..and i need to save the image in a directory with name as current date and time...but problem is this that ":" i.e. the colon is not suppoted in name....so can anyone suggest me how can i name the image file with date and time??