Convert Lat/Longs to X/Y Co-ordinates

Question

I have the Lat/Long value of New York City, NY; 40.7560540,-73.9869510 and a flat image of the earth, 1000px × 446px.

I would like to be able to convert, using Javas

Answer 1

If you have a picture of the whole earth, the projection does always matter. But maybe I just don't understand your question.