http://www.cafeaulait.org/course/week12/index.html
http://www.docjar.com/docs/api/java/overview-summary.html
http://www.iam.ubc.ca/guides/javatut99/uiswing/painting/loadingImages.html
http://pirate.shu.edu/~wachsmut/Teaching/CSAS2214/Virtual/Lectures/lecture14/lecture14.html
http://javaalmanac.com/egs/java.net/pkg.html
http://www.cafeaulait.org/course/week9/13.html
http://www.ictp.trieste.it/~manuals/programming/Java/tutorial/uiswing/painting/loadingImages.html