This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
If you want to control the scroll bars visibility then use one of the JScrollPane constructors that always you to set the scroll bar policy for each axis to one of the following (default is XXX_AS_NEEDED):
For vertical axis:
For horizintal axis: