File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Swing / AWT / SWT and the fly likes Rectangle constructor ? Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Swing / AWT / SWT
Bookmark "Rectangle constructor ?" Watch "Rectangle constructor ?" New topic

Rectangle constructor ?

Pin Ting

Joined: May 28, 2003
Posts: 22
Dear all ranchers,
I read this in the Java SE 1.4.1 API doc:
Rectangle(int x, int y, int width, int height)
Constructs a new Rectangle whose top-left corner is specified as (x, y) and whose width and height are specified by the arguments of the same name.
But I found the first two args really represent the "bottom-left" corner of the rectangle. What's the coordinate convention in Java library? Do I mistake something?
Pin Ting

Never do things the hard way if you don't have a good reason.
Ernest Friedman-Hill
author and iconoclast

Joined: Jul 08, 2003
Posts: 24199

You might be confused because in Java, as in most computer graphics environments, (0, 0) is the upper left corner of the screen, not the lower left, and increasing the Y coordinate moves downward -- the oppposite of a "normal" Cartesian coordinate system.

[Jess in Action][AskingGoodQuestions]
I agree. Here's the link:
subject: Rectangle constructor ?
It's not a secret anymore!