This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Hi, I really dont know why null pointer is thrown in this code:-
the program is supposed to display a fill oval with color according to the selection made by user from the checkbox. the graphics object for canvas seems to be the problem again, although this time i've put it this way:-