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  Difference between Graphics and Graphics2D?  (Read 6545 times)
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Offline appel

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« Posted 2006-01-02 09:34:28 »

I'm wondering the difference between doing the two:

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Graphics g = image.getGraphics();

// and

Graphics2D g = (Graphics2D)image.getGraphics();


?
Offline Riven
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« Reply #1 - Posted 2006-01-02 10:36:05 »

image.getGraphics() actually returns a Graphics2D object, although the return-type is Graphics.

Graphics2D is a subclass of Graphics. With Graphics2D you have more advanced features, so you might want to cast the returned object to it, to access these functions.

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Offline Linuxhippy

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« Reply #2 - Posted 2006-01-02 10:37:27 »

you get a graphics2d object all the time, if you cast it to a Graphics2D you simply tell the compiler that you know that you get a Graphics2D object and therefore can use all the methods supported by graphics2d.

So if you don't need any graphics2d method its perfectly valid to also use a plain graphics object, the same methods will be called anyway.

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Offline Juriy

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« Reply #3 - Posted 2006-01-23 12:16:20 »

Is there any performance difference between using Graphics and Graphics2D? If Graphics2D is more complex and advanced, maybe it is also somehow accelerated or optimized?

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Offline Ask_Hjorth_Larsen

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« Reply #4 - Posted 2006-01-23 13:13:57 »

The Graphics object (in this context) *is* a Graphics2D object in disguise. It's the same object. No difference.
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