Hi Deepak,
The problem is likely to be because you extend JApplet and
heavyweight components associated with JApplet are not really
compatible with headless mode. Have a look at
http://weblogs.java.net/blog/ixmal/archive/2006/04/headless_toolki_1.html
for more details.
Easiest solution is to use JComponent instead of JApplet.
However, if this class it supposed to be used in the server
environment, it should be probably reimplemented to use ImageIO
instead of Toolkit (so you do not need even JComponent).
Thanks,
Andrew
Deepak Jain wrote:
Hi Andrew,
Really thanks for taking time out and helping me with this. Thanks for
the reply I will look into that. I am stuck with HeadlessException
now.Am also searchin in google for any solution , In case you have time
please have a look @ this.
However I have another exception now.
I have a class Test that extends
public class Test extends JApplet {
//Draws a composite image into a BufferedImage object and then writes it
to the file.
}
When i run this file outside my webapplication {Jboss server} it runs
fine and it creates a temp file which has the composite image i need
However when i run from my webapp i get *java.awt.HeadlessException* .
Now when i run it in my webapp by instantiating the class
Test render= new Test ();
render.getComposite();
There is no constructor defined in my class Test.
Any help on this is appreciated
Thanks again.
Deepak
On 6/14/06, *Andrew Brygin* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Hi Deepak,
To be able write GIF files you must have recent beta of jdk 6.0
You can download it from http://download.java.net/jdk6/binaries/.
If using jdk 6.0 is not option for you then you might consider
using JAI plugins. For more information on JAI have a look at
https://jai-imageio.dev.java.net/.
Thanks,
Andrew
Deepak Jain wrote:
> Hi Andrew,
> Bingo it worked, But I need to save the file as jpeg instead of
gif. Any
> ideas how can I save it as gif file.
> Thanks
> Deepak
>
>
> On 6/14/06, *Deepak Jain* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
> <mailto: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>> wrote:
>
> Hi Andrew,
> Thanks for the reply , I am using jdk 1.5.0_06.
> Here are the steps I tried
> 1. First I created the BufferedImage object
> BufferedImage buffered_image =
> new BufferedImage (600, 300,
BufferedImage.TYPE_INT_RGB);
> 2. Now I create a Graphics2D object fromt the buffer so that
I can
> write it into this bufferedImage object.
> Graphics2D buf_image_graphics =
buffered_image.createGraphics ();
> 3. Now once I have the graphics2d object I call
> drawImage() method using it and construct a composite image.
> Once done drawing, I need write the constructed composite
image in
> the buffer object it to the file.
> 4.Now I create a new file using
> File f = new File ("c:\\anImage.gif");
> and write BufferedImage object into the file using
>
> try {
> ImageIO.write (buffered_image, "gif", f);
> } catch (IOException e) {
> // TODO Auto-generated catch block
> e.printStackTrace();
> }
>
> After excuting the above progrm,
> A new file c:\\anImage.gif is created but this file is empty?
> I dont know where did I go wrong.
> Any help is appreciated.
> Thanks
> Deepak
> On 6/13/06, *Andrew Brygin* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
> <mailto:[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>> wrote:
>
> Hi Deepak,
>
> What version of jdk are you using?
>
> ImageIO plugin for writing GIF images is available only
starting
> from jdk 6.0 b39.
> If you are using older version please try latest jdk
6.0 beta.
>
> Also note that GIF image format directly supports only
images
> with color palette. You are using TYPE_INT_RGB image
that does
> not have palette.
> In such case palette will be constructed automatically
but such
> palette might be not ideal especially if original image
has more
> than 256 colors.
>
> If GIF is not strict requirement for you I'd suggest to
use PNG.
> It should work fine with your images (without any
quality issues)
> and it is available since 1.4.2 .
>
> Thanks,
> Andrew
>
> Deepak Jain wrote:
> > Hi,
> > I am completely lost with Java2d. I have some how
managed to
> construct a
> > composite image and i dont understand how i did it. Please
> find the code
> > below, I was working on one of ur examples.Now i need
to dump this
> > composite image to a temp file so that i can display
it on the
> > web-browser using the <img> tag of html. I tried
BufferedImage
> but I am
> > not able to understand what BufferedImage does, read
java doc but
> > failed to understand. Please let me know any solution
for this.
> >
> >
> >
> > import java.awt.Dimension;
> > import java.awt.Graphics;
> > import java.awt.Graphics2D;
> > import java.awt.Image;
> > import java.awt.MediaTracker;
> > import java.awt.RenderingHints ;
> > import java.awt.Toolkit;
> > import java.awt.event.WindowAdapter ;
> > import java.awt.event.WindowEvent;
> > import java.awt.image.BufferedImage;
> > import java.io.File;
> > import java.io.IOException ;
> >
> > import javax.imageio.ImageIO;
> > import javax.swing.JApplet;
> > import javax.swing.JFrame;
> > /*
> > <applet code="ACImages" width="600"
height="300"></applet>
> > */
> > public class ACimages extends JApplet {
> >
> > private String m_backGroundImgName =
"emptyEnclosure.gif";
> >
> > private Image backImgObj;
> >
> > private final int []backImgDimen = {240,150};
> >
> > private String dimentionInfo[] =
>
> {"server_1X_2Y","server_1X_2Y","server_1X_2Y","server_1X_2Y"
>
>
,"server_1X_2Y","server_1X_2Y","server_1X_2Y","server_1X_2Y"};
>
> >
> > private Image eleImgObj[] = new
Image[dimentionInfo.length];
> >
> > private final int MAX_NUM_SLOTS_XDIRECT = 8;
> >
> > public void init() {
> > Toolkit tk = getToolkit();
> > backImgObj =
>
> tk.getImage(ACimages.class.getResource(m_backGroundImgName));
> > try {
> > MediaTracker tracker = new MediaTracker(this);
> > tracker.addImage (backImgObj, 0);
> > tracker.waitForID (0);
> > } catch (Exception e) {}
> >
> > for(int i = 0; i < dimentionInfo.length; i++) {
> > eleImgObj[i] =
> > tk.getImage
(ACimages.class.getResource(dimentionInfo[i] +
> ".gif"));
> > try {
> > MediaTracker tracker = new
MediaTracker(this);
> > tracker.addImage(eleImgObj[i], 0);
> > tracker.waitForID(0);
> > } catch (Exception e) {}
> > }
> > }
> >
> > public void drawDemo(int w, int h, Graphics2D g2) {
> >
> > int iw = 24;
> > int ih = 150;
> > float xx = 0, yy = 10;
> > g2.drawImage(backImgObj, (int) xx, (int) yy,
> backImgDimen[0],
> > backImgDimen[1], null);
> > for (int i =0; i < eleImgObj.length ; i++) {
> >
> > if(i>MAX_NUM_SLOTS_XDIRECT-1) {
> > xx = 0;
> > }
> > xx += iw;
> > g2.drawImage(eleImgObj[i], (int) xx, (int)
yy, iw,
> ih, null);
> > Image status =getToolkit().getImage(
> > ACimages.class.getResource("Critical" + ".gif"));
> > try {
> > MediaTracker tracker = new
MediaTracker(this);
> > tracker.addImage(status, 0);
> > tracker.waitForID(0);
> > } catch (Exception e) {}
> > g2.drawImage(status, (int) xx+6, (int)
yy+6, 13,
> 13, null);
> > }
> > }
> >
> >
> > public void paint(Graphics g) {
> > Graphics2D g2 = (Graphics2D) g;
> > Dimension d = getSize();
> > g2.setBackground(getBackground());
> > g2.clearRect(0, 0, d.width, d.height);
> >
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
> >
RenderingHints.VALUE_ANTIALIAS_ON);
> > g2.setRenderingHint (RenderingHints.KEY_RENDERING,
> >
RenderingHints.VALUE_RENDER_QUALITY );
> > drawDemo( d.width, d.height, g2);
> >
> > }
> >
> > private void writeToFile() {
> > BufferedImage buffered_image =
> > new BufferedImage (600, 300,
BufferedImage.TYPE_INT_RGB );
> > Graphics2D buf_image_graphics =
> buffered_image.createGraphics ();
> > System.out.println("buffered_image
:"+buffered_image);
> > Dimension d = getSize();
> > buf_image_graphics.setBackground(getBackground());
> > buf_image_graphics.clearRect(0, 0, d.width,
d.height);
> >
>
buf_image_graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
> >
RenderingHints.VALUE_ANTIALIAS_ON);
> > buf_image_graphics.setRenderingHint(
> RenderingHints.KEY_RENDERING,
> >
RenderingHints.VALUE_RENDER_QUALITY);
> > drawDemo(d.width, d.height, buf_image_graphics);
> > File f = new File ("c:\\anImage.gif");
> > try {
> > ImageIO.write (buffered_image, "gif", f);
> > } catch (IOException e) {
> > // TODO Auto-generated catch block
> > e.printStackTrace();
> > }
> >
> > System.out.println("buffered_image
:"+buffered_image);
> >
> > }
> >
> > public static void main(String argv[]) {
> > final ACimages demo = new ACimages();
> > demo.init();
> > JFrame f = new JFrame("Java 2D(TM) Demo -
ACimages");
> > f.addWindowListener (new WindowAdapter() {
> > public void windowClosing(WindowEvent e)
> {System.exit (0);}
> > });
> > f.getContentPane().add("Center", demo);
> > f.pack();
> > f.setSize(new Dimension(600,300));
> > f.show();
> > demo.writeToFile ();
> > }
> > }
> >
> >
> > --
> > Bad boy for life !!!
> >
>
===========================================================================
> > To unsubscribe, send email to [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
> <mailto:[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> and include in the
> > body of the message "signoff JAVA2D-INTEREST". For general
> help, send
> > email to [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> <mailto: [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>
> and include in the body of the message
> > "help".
>
>
>
>
> --
> Bad boy for life !!!
>
>
>
>
> --
> Bad boy for life !!!
--
Bad boy for life !!!
===========================================================================
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff JAVA2D-INTEREST". For general help, send email to
[EMAIL PROTECTED] and include in the body of the message "help".
