So much to do in java, just search the net, improve your understanding of java unless of course you think the course here is enough. Are you into programming by your own choice? Just asking, because if you are into programming by your choice, then why this question comes is beyond my understanding. You may say you are not getting project ideas, fair enough it happens with everyone, but till you don't find anything that interests you can simply improve your knowledge. Learn about various frameworks. How and where they are used etc.
Have you try Eclipse IDE program?
if y just beginning coding some IDE interface is must install y computer :)
btw. Eclipse make possible to work whit other user "public" projects. If i'm not right prepared my pinion
it is possible id001x but i generally create autonom ( using interface and databases) appliction on c#. perhaps, i am gonna create an simple game such as tetris snake...etc at the least for begining...