I have gotten the problem solved. The reason was that I have put my applet
under servlets directory.
On Sat, 28 Oct 2000, Milt Epstein wrote:
> On Fri, 27 Oct 2000, Heakyung Park wrote:
>
> > Yes, I did that. I set the html file under webpages directory
> > setting codebase to "servlet/" where I put my applet class file in
> > it. But still it doesn't load the applet. I am continously getting
> > "applet couldn't be loaded". It does load all other html things
> > except the applet. For my guess, it finds the applet, but doesn't
> > know how to load or I am missing something in my applet. I can
> > clearly view the applet by appletviewer.
>
> You don't seem to be listening to/understanding my
> comments/suggestions. I will try once more to explain.
>
> I am 99% sure the problem is that the applet code is not being found
> (don't get hung up on any distinction between "find" and "load" at
> this point). That is, where it is looking, where you are indicating
> the applet code is, is not actually where it is. (You "indicate"
> where it is by where the HTML file is, modified by the CODEBASE
> attribute.)
>
> Most likely, "servlet/" is not a real directory, it is a virtual
> directory that the servlet container knows about -- it is where it
> goes to look for servlets.
>
> When a request comes in for something like:
>
> http://www.domain.com/servlet/Something/or/other
>
> the "servlet/" part of the URL tells the web server to pass control to
> the servlet container, which then uses the "/Something/or/other" part
> of the URL to know which servlet to call. Neither the servlet
> container nor the web server will be able to properly handle applet
> code requested via a URL containing "servlet/"; similar for applet
> code placed in the same directory as the servlets (this is a bit of a
> simplification, but should be sufficient/accurate here).
>
> My previous suggestion was to take the servlet totally out of the
> loop, just to show that you can get the applet to run, and to improve
> your understanding of how all the pieces fit together. You can do
> this by putting the HTML file and the applet code in the root document
> directory of your web server. For that, you shouldn't need a CODEBASE
> attribute. Try this, and see if you can get it to work.
>
> Also, have you checked your servlet container and/or web server logs
> to see if there are any relevant messages there? I strongly suspect
> there are some things in there that would be very helpful in isolating
> the problem.
>
> This is most certainly a case where a sniffer or similar would come in
> handy, so you could see exactly what was being requested and what the
> response is.
>
>
> > On Fri, 27 Oct 2000, Milt Epstein wrote:
> >
> > > On Fri, 27 Oct 2000, Heakyung Park wrote:
> > >
> > > > Hello! I have tried several approaches suggested. However, I am
> > > > still having same problem. My problem is that I placed applet and
> > > > html in the same directory, and when I call the html file (that has
> > > > <applet> tags) from other servlet. All other materials is displayed
> > > > properly, except the applet, and I am getting "applet cannot be
> > > > loaded!" Any suggestion! Thanks in advance. My applet doesn't
> > > > communicate with any other resources at all for now, it just
> > > > displays a chart.
> > >
> > > Why don't you try getting it working without the servlet first -- that
> > > should help get you going, and eliminate some variables as being the
> > > cause of the problems. That is, set up a static HTML file, in a
> > > regular, non-servlet directory, with the APPLET tags, and get that
> > > working. You can probably do it with the applet class files in the
> > > same directory as the HTML file, or in separate directory, using
> > > appropriate settings for the CODEBASE attribute.
> > >
> > >
> > > > On Tue, 24 Oct 2000, Heakyung Park wrote:
> > > >
> > > > > I stored the applet in the same directory as the servlet is located. My
> > > > > problem is not finding the applet to be loaded, it is that "the applet
> > > > > cannot be loaded." I tried the code base approach, if the browser doesn't
> > > > > find the applet, the message says "the applet cannot be found." I hope I
> > > > > didn't misunderstand you. Thanks.
> > > > >
> > > > >
> > > > > On Tue, 24 Oct 2000, Milt Epstein wrote:
> > > > >
> > > > > > On Tue, 24 Oct 2000, Heakyung Park wrote:
> > > > > >
> > > > > > > So you mean the reason I am having the problem is due to my code? No
>other
> > > > > > > possible reason?
> > > > > > >
> > > > > > > The following is the servlet code to display java applet;
> > > > > > > import java.io.*;
> > > > > > > import javax.servlet.*;
> > > > > > > public class gan extends GenericServlet {
> > > > > > > public void service (ServletRequest request, ServletResponse
> > > > > > > response) throws ServletException, IOException {
> > > > > > > response.setContentType("text/html");
> > > > > > > PrintWriter pw = response.getWriter();
> > > > > > > pw.println("<html><head><title>Gentt Chart</title></head><body>");
> > > > > > > pw.println("<h1>Project Schedule in Gantt Chart</h1>");
> > > > > > > pw.println("<applet code=\"gantt\" width=500 height=500></applet>");
> > > > > > > pw.println("</body></html>");
> > > > > > > pw.close();
> > > > > > > }
> > > > > > > }
> > > > > > [ ... ]
> > > > > >
> > > > > > I suspect the problem is that the browser cannot find the applet code
> > > > > > to (down)load. The way you have it above, the applet code is expected
> > > > > > to be in the same "directory" as the html page, but that html was
> > > > > > generated by a servlet, so it's in the servlet virtual directory. I
> > > > > > think you need to specify a directory via the CODEBASE attribute on
> > > > > > the APPLET tag that will tell the browser where to find the applet
> > > > > > code. (The exact value of which depends on where the applet code is.)
> > > > > >
>
> Milt Epstein
> Research Programmer
> Software/Systems Development Group
> Computing and Communications Services Office (CCSO)
> University of Illinois at Urbana-Champaign (UIUC)
> [EMAIL PROTECTED]
>
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