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Question

. I've created a page (EmailServerSketches) with several TWikiDrawPlugin sketches. I used IE5 and can edit just fine.

I invited some members of my lug to comment on the pages -- two of them tried to edit the pages and were not successful.

One person said: "I just edited your first sketch. I saved it in the java application by choosing "Save and Exit". Nothing happened. I tried this several times. Eventually the Java applet reloaded the original diagram and I lost all my changes."

He is registered at TWiki.

Here is an update from him:

I've done some more testing, The exit options ("Save and exit" and "Exit without saving") simply do not work. Not only did my changes not get saved, but I had to use the exit button to make the window go away.

I'm running RH 7.2, KDE 2.2-11, Konqueror 2.2.1 and IBM's (?) JVM version 1.3.1_02.

Since then he has managed to edit the sketches using Netscape 4.78, but has not been able to use Konqueror.

Another followup:

BTW: When trying to do an "Save and Exit" from within TwikiDraw, Konq reports:

java.io.FileNotFoundException:
http://twiki.org/cgi-bin/upload/Wikilearn/TestSketch

But why? I'm using the same JVM under the different browsers...or am I?
Does Netscape use an internal JVM?

The other person said: "I had problems editing in Mozilla and galeon, it killed the browser." He is not registered, so maybe that is the problem for him.

His about plugins shows Java Plug-in 1.3.1-b24.

I tried editing the sketches as TWikiGuest under IE5 and had no problem. I can't try editing from Linux as I do not have Java installed.

Anybody have any similar experiences or any hints to offer?

  • TWiki version: Current on twiki.org (20020218)
  • Web server: "
  • Server OS: "
  • Web browser: konqueror, Mozilla, galeon (not sure of versions)
  • Client OS: Linux

-- RandyKramer - 18 Feb 2002

Answer

I think Netscape uses its own JVM - it had Java support quite early, and only later did Sun come up with pluggable JVMs through the JRE. Check the netscape install directory to be sure, though.

You can modify the HTML source to get Netscape or any browser to use a different JVM, check the Sun site. Probably the simplest thing is to try a different JVM temporarily (see Google:java+plugin) and have Konqueror etc use that. Also, check the version of the Netscape JVM (e.g. JDK 1.1) and try to install an equivalent JVM version - JDK 1.3 is quite recent, but Netscape 4.x's JVM is bound to be much older, so perhaps the plugin's applet code has some problems with newer JVMs.

-- RichardDonkin - 19 Feb 2002

I gave two students here the project of rewriting the TWikiDraw Applet on the Java Webstart technology. This basically executes the java code as an application, not an applet. Thus you can run it on any browser, even with a bad JVM or no java at all, and not requiring the user to install the java plugin, that can be tricky on unix. Seems to work well, the students have liked this project and want to clean the code a bit before releasing it here.

-- ColasNahaboo - 22 Feb 2002

I'll be watching for it!

-- RandyKramer - 23 Feb 2002

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Topic revision: r8 - 2002-05-21 - TWikiAdmin
 
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