Java Programming

for our project, our teacher assigned us to make a java rpg game. this is not a very advanced game, the map is only stationary, and you know, the hero moves around it, and stuff

bottom line is: i do not know how to begin. could you please give me some tips on how to start? i am clueless on gui, it is very very broad!

i would like to start working on the map, it is tiled. like how am i to print a tile on a certain location i want, and what are the classes etc etc. and really, i am lost in the middle. i'm really on a daze because i already got used to c, and this gui thing is really new to me.

thank you.