Thread: Understanding Graphics2d, canvas and shapes

Hi,

I am learning the basics of java games programming and I am confused about a few things.
I know you use the "canvas" class to create a blank canvas and then use the paint method to create stuff.

But what does graphics2d? I have seen people using the grahpics2d class to create a canvas for example

Graphics2D g2d = (Graphics2D) g;
g2d.setColor(Color.BLACK);

now why did they use the grahpics2d and not the canvas?

also I have seen people creating shapes like a rectangle by using:
Rectangle r = new Rectangle();

but some people have created them like:

Shape shape = new Rectangle2D.Double(value1,valu2,valu3,valu4);

Whats the difference between these two?

Thanks in advance.

regards,

Welcome to the Forum! Please read this topic to learn how to post code correctly and other useful tips for newcomers.

There are typically many ways to accomplish the same, or nearly the same, thing in Java. The way chosen is often personal preference, what was learned first, or a specific approach that supports the rest of the design, so therefore dependent on the requirements of a larger context than you've provided.

You can learn about the differences in the approaches you've mentioned by studying the API for the classes being used. It's better that you do that research than to rely on someone else to do it for you.