Hi,
We are also getting the same problem. Our X Windows server is running. We
are using NES and Servlet Exec. Please tell me how to set the DISPLAY
variable and where. Is it in the start script for NES.
Thanx in advance,
Bhuvana..
> ----------
> From: Loni & Bharat Nagwani[SMTP:[EMAIL PROTECTED]]
> Reply To: A mailing list about Java Server Pages specification and
> reference
> Sent: Sunday, December 03, 2000 3:23 AM
> To: [EMAIL PROTECTED]
> Subject: Re: draw image
>
> You have to run X Windows on the server for this to work. Also in your
> appserver startup file you have to set DISPLAY variable. If you need more
> details send me an email and I will dig out the details tommorow.
>
> ----- Original Message -----
> From: Ching sen, Jackson <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Sunday, November 26, 2000 4:29 AM
> Subject: draw image
>
>
> > hi all,
> >
> > I copy this draw image servlet from a book
> >
> > import java.io.*;
> > import java.awt.*;
> > import javax.servlet.*;
> > import javax.servlet.http.*;
> >
> > import Acme.JPM.Encoders.GifEncoder;
> >
> > public class HelloWorldGraphics extends HttpServlet {
> >
> > public void doGet(HttpServletRequest req, HttpServletResponse res)
> > throws ServletException, IOException {
> > ServletOutputStream out = res.getOutputStream(); // binary output!
> >
> > Frame frame = null;
> > Graphics g = null;
> >
> > try {
> > // Create an unshown frame
> > frame = new Frame();
> > frame.addNotify();
> >
> > // Get a graphics region, using the Frame
> > Image image = frame.createImage(400, 60);
> > g = image.getGraphics();
> >
> > // Draw "Hello World!" to the off screen graphics context
> > g.setFont(new Font("Serif", Font.ITALIC, 48));
> > g.drawString("Hello World!", 10, 50);
> >
> > // Encode the off screen image into a GIF and send it to the
> client
> > res.setContentType("image/gif");
> > GifEncoder encoder = new GifEncoder(image, out);
> > encoder.encode();
> > }
> > finally {
> > // Clean up resources
> > if (g != null) g.dispose();
> > if (frame != null) frame.removeNotify();
> > }
> > }
> > }
> >
> > but I got this error message, pls tell me how to fix it.
> >
> > java.lang.InternalError: Can't connect to X11 window server using ':0.0'
> as the value of the DISPLAY variable.
> > at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
> > at sun.awt.X11GraphicsEnvironment.(X11GraphicsEnvironment.java:58)
> > at java.lang.Class.forName0(Native Method)
> > at java.lang.Class.forName(Class.java:120)
> > at
> java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironme
> nt
> .java:59)
> > at sun.awt.motif.MToolkit.(MToolkit.java:56)
> > at java.lang.Class.forName0(Native Method)
> > at java.lang.Class.forName(Class.java:120)
> > at java.awt.Toolkit$2.run(Toolkit.java:495)
> > at java.security.AccessController.doPrivileged(Native Method)
> > at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:488)
> > at java.awt.Window.getToolkit(Window.java:416)
> > at java.awt.Frame.addNotify(Frame.java:270)
> > at HelloWorldGraphics.doGet(HelloWorldGraphics.java:20)
> > at javax.servlet.http.HttpServlet.service(HttpServlet.java:715)
> > at javax.servlet.http.HttpServlet.service(HttpServlet.java:840)
> > at
> com.sun.web.core.ServletWrapper.handleRequest(ServletWrapper.java:155)
> > at com.sun.web.core.InvokerServlet.service(InvokerServlet.java:168)
> > at javax.servlet.http.HttpServlet.service(HttpServlet.java:840)
> > at
> com.sun.web.core.ServletWrapper.handleRequest(ServletWrapper.java:155)
> > at com.sun.web.core.Context.handleRequest(Context.java:414)
> > at com.sun.web.server.ConnectionHandler.run(ConnectionHandler.java:139)
> >
> >
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>
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For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST".
Some relevant FAQs on JSP/Servlets can be found at:
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http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
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