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.
Dale is correct. import statements have no affect what so ever on performance. u can put as many as u want including as many wildcards as u want and it wont affect it one bit. import staments only help us typing out the name of the class instead of the FULL name inlcuding the package. however, u should note that using wildcards is not recommended for a diffrent reason: it may cause class name clashes in your pgram and make it sometimes harder to understand.