Java Programming

Is there much of a difference between ++j and j++ within a for loop decleration?

eg for(int j; j<max; ++j){}

I have being some practise algorythms over at topcoder, and looking at some of the top scoring entries they all seem to use ++j, where as i use j++.

I know i may be reading to much into this, and couldn't see what effect this would have on the written alogrythms, but just wanted to check if i was missing something obvious!