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From: Jason Cavett on 8 Jul 2008 12:25
I just want to make sure I understand correctly.

If I'm using the Windows, Metal (Ocean) or GTK L&F, antialiasing is
automatically detected by Java? Is this true? If not, what would I
have to do to turn antialiasing on? (I've been reading various
articles online, and there are inconsistent answers, so I wanted to
check here.)


Thanks
From: Knute Johnson on 8 Jul 2008 14:31
Jason Cavett wrote:
> I just want to make sure I understand correctly.
>
> If I'm using the Windows, Metal (Ocean) or GTK L&F, antialiasing is
> automatically detected by Java? Is this true? If not, what would I
> have to do to turn antialiasing on? (I've been reading various
> articles online, and there are inconsistent answers, so I wanted to
> check here.)
>
>
> Thanks

Swing components are now anti-aliased by default. If you want to
anti-alias your drawing you need to add RenderingHints to the Graphics2D
you are drawing with. Swing components and in fact all graphics
contexts are now Graphics2D I believe, even though they are passed as
Graphics.

paintComponent(Graphics g2D) {
Graphics2D g = (Graphics2D)g2D;
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
...

There are numerous options for RenderingHints, check out the docs. If
you want to see an example of an anti-aliased drawing, check out my
analog clock.

http://rabbitbrush.frazmtn.com/clock.html

Just recompile it and comment out the rendering hints and you can see
the difference easily.

--

Knute Johnson
email s/nospam/knute2008/

--
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From: CD1 on 9 Jul 2008 09:50
You can turn anti-alias on by running your JVM with the option "-
Dswing.aatext=true". For example, if you want to run your class "App"
with anti-alias on, just call the JVM:

java -Dswing.aatext=true App

This is valid for Java 5 and 6, at least (don't know if it works for
Java 1.4), and only for the Swing classes. But if you want to draw
something yourself with anti-alias, do as Jason said.
From: Roedy Green on 9 Jul 2008 17:53
On Tue, 8 Jul 2008 09:25:14 -0700 (PDT), Jason Cavett
<jason.cavett(a)gmail.com> wrote, quoted or indirectly quoted someone
who said :

>If I'm using the Windows, Metal (Ocean) or GTK L&F, antialiasing is
>automatically detected by Java? Is this true? If not, what would I
>have to do to turn antialiasing on? (I've been reading various
>articles online, and there are inconsistent answers, so I wanted to
>check here.)

see http://mindprod.com/jgloss/antialiasing.html
--

Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com
From: Jason Cavett on 9 Jul 2008 18:04
On Jul 9, 9:50 am, CD1 <cristiandei...(a)gmail.com> wrote:
> You can turn anti-alias on by running your JVM with the option "-
> Dswing.aatext=true". For example, if you want to run your class "App"
> with anti-alias on, just call the JVM:
>
> java -Dswing.aatext=true App
>
> This is valid for Java 5 and 6, at least (don't know if it works for
> Java 1.4), and only for the Swing classes. But if you want to draw
> something yourself with anti-alias, do as Jason said.

That doesn't work for 1.4. Looks like it works for 5. I'm not sure
whether or not it works for 6. When I looked up that value online,
some websites said that 6 was enabled AA based on the system
settings. (Roedy's website seems to agree.)

Thanks for the info.
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