Why Java 2D origin is at the top left corner?

Question

I'm not complaining, just wonder. Why Java use top left point of the drawing surface as origin? I assume more natural is to choose left bottom corner as origin and increase axis as they go up and right (similar to Quartz).

Answer 1

Computer graphics has had the origin in the upper left since the dawn of time, with QuickDraw included. Using the lower left (as in math) is a PostScript/PDF thing. Since Quartz is based on PDF, it uses its coordinates, but that is mostly a unique decision among graphics libraries.