I aked Yaov Shapira if Java Questions were ok for this list. He said it was
fine because this is a USER list for Tomcat. And java class programming has a
great deal to do with using Tomcat.
"Frank W. Zammetti" <[EMAIL PROTECTED]> wrote: I don't quite see how this is
Tomcat-related, but...
Your code can't connect to your X server, which is necessary for many
Java graphics-related functions to work on a *nix system. I dealt with
this at one point when getting DataVision working on Linux, and I recall
the solution being something to do with an environment variable, but the
exact answer eludes me.
Actually, it looks like you *have* defined the environment variable
(DISPLAY in the stack trace rings a bell). Is X running? I believe it
has to be for this to work.
Frank
Justin Jaynes wrote:
> Hello all,
>
> I've written a java class to scale jpeg images. But I can't seem to get it to
> work. Can anyone point me in the right direction?
>
> Here is my code:
>
>
> package com.everybuddystree;
>
> import java.awt.*;
> import java.awt.image.*;
> import java.io.*;
> import javax.imageio.*;
>
> public class ImageScaler {
>
> public ImageScaler() {
> }
>
> public boolean scaleImageByWidth(String fileName, int newWidth) {
>
> File originalImage = new File(fileName);
> try {
> BufferedImage workingBufferedImage = ImageIO.read(originalImage);
> int width = workingBufferedImage.getWidth();
> int height = workingBufferedImage.getHeight();
> Image workingImage = workingBufferedImage;
> workingImage = (Image)workingImage.getScaledInstance(newWidth,-1,1);
> BufferedImage finalImage = (BufferedImage)workingImage;
> ImageIO.write(finalImage, "jpg", originalImage);
>
> return true;
>
> } catch (IOException ex){
>
> return false;
>
> }
>
> }
>
> }
>
> When I run the pass an image to the class using a jsp I get the
> following errors from Tomcat:
>
>
> HTTP Status 500 -
> ---------------------------------
> type Exception report
> message
> description The server encountered an internal error () that prevented it
> from fulfilling this request.
> exception
> javax.servlet.ServletException: Can't connect to X11 window server using
> ':0.0' as the value of the DISPLAY variable.
> org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:848)
>
> org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
> org.apache.jsp.image_jsp._jspService(org.apache.jsp.image_jsp:158)
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:802) root cause
> java.lang.InternalError: Can't connect to X11 window server using ':0.0' as
> the value of the DISPLAY variable.
> sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
> sun.awt.X11GraphicsEnvironment.access$000(X11GraphicsEnvironment.java:53)
> sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:142)
> java.security.AccessController.doPrivileged(Native Method)
> sun.awt.X11GraphicsEnvironment.(X11GraphicsEnvironment.java:131)
> java.lang.Class.forName0(Native Method)
> java.lang.Class.forName(Class.java:164)
> java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
> sun.awt.X11.XToolkit.(XToolkit.java:96) java.lang.Class.forName0(Native
> Method) java.lang.Class.forName(Class.java:164)
> java.awt.Toolkit$2.run(Toolkit.java:821)
> java.security.AccessController.doPrivileged(Native Method)
> java.awt.Toolkit.getDefaultToolkit(Toolkit.java:804)
> java.awt.Image.getScaledInstance(Image.java:158)
> com.everybuddystree.ImageScaler.scaleImageByWidth(ImageScaler.java:21)
> org.apache.jsp.image_jsp._jspService(org.apache.jsp.image_jsp:114)
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:802) note The full
> stack trace of the root cause is available in the Apache Tomcat/5.5.12 logs.
>
> ---------------------------------
> Apache Tomcat/5.5.12
>
>
>
>
>
>
> ---------------------------------
> Yahoo! Photos Showcase holiday pictures in hardcover
> Photo Books. You design it and well bind it!
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM: fzammetti
Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
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