How to create jpeg files in java ?

[Martin M]

Hi collegues,

I have two problems:
1.) I am calculating some pixels and show them on the mintor, but there is
no point or pixel class in java to show one pixel on the monitor. My
workaroung is to use Graphics g ; g.setColor(new Color(x,y,z) );
g.drawLine(x,y,1,1);
Are there any more polite ways to draw pixels on the screen ?
and
2)How do I am able to save my picture from screen in to a jpeg-files ?
Where can I get the jpeg saving and imaging (coding/decoding) algorithm ?

Regards,
Martin

 

[Guest]

Hi collegues,

I have two problems:
1.) I am calculating some pixels and show them on the mintor, but there is
no point or pixel class in java to show one pixel on the monitor. My
workaroung is to use Graphics g ; g.setColor(new Color(x,y,z) );
g.drawLine(x,y,1,1);
Are there any more polite ways to draw pixels on the screen ? and
2)How do I am able to save my picture from screen in to a jpeg-files ?
Where can I get the jpeg saving and imaging (coding/decoding) algorithm
?

Regards,
Martin

Do a quick google on java +jpg.

http://www.geocities.com/marcoschmidt.geo/java-image-coding.html

HTH,
La'ie Techie

 

[Liz]

Do a quick google on java +jpg.

http://www.geocities.com/marcoschmidt.geo/java-image-coding.html

HTH,
La'ie Techie

I use this where p is a filename, and I is aBufferedImage.
---------
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
FileOutputStream fos = new FileOutputStream(p);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(fos);
encoder.encode(I);

 

[Roedy Green]

I have two problems:
1.) I am calculating some pixels and show them on the mintor, but there is
no point or pixel class in java to show one pixel on the monitor. My
workaroung is to use Graphics g ; g.setColor(new Color(x,y,z) );
g.drawLine(x,y,1,1);

If you have an Image, there are methods to manipulate it, then use
drawImage in paint or paintComponent. That way you don't have to keep
recomputing all the speckles on every paint.

Are there any more polite ways to draw pixels on the screen ?
and
2)How do I am able to save my picture from screen in to a jpeg-files ?
Where can I get the jpeg saving and imaging (coding/decoding) algorithm ?

see http://mindprod.com/jgloss/jpegencoder.html