SDK/JRE 1.2 using Netscape 4.5 instead of Appletviewer

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3 total messages Started by Jan Sat, 13 Mar 1999 00:00

#1276

Author: Jan
Date: Sat, 13 Mar 1999 00:00

83 lines
3956 bytes

Hi,
i've written a swing-based applet using jdk1.1.6.
It worked both with appletviewer (working both over the network and from
the local file system). and with Netscape navigator with the JFC/Swing
release.
Then I downloaded the JRE 1.2.
with appletviewer there still is no problem, neither from network
(downloading it via http)
nor from the local file system.
Netscape Navigator has no prblems with executing any other Swing - based
Applet from the Java Tutorial.
But with my applet, Netscape Communicator 4.5, using JRE 1.2, loading
the applet for the first time gives:

****START OF ERROR ONE IN JAVA CONSOLE
Netscape Communications Corporation -- Java 1.1.5
Type '?' for options.
Symantec Java! ByteCode Compiler Version 210.065
Copyright (C) 1996-97 Symantec Corporation
warning: running 1.2 version of SwingUtilities
# Verifier error
TwentyOne.actionPerformed(Ljava/awt/event/ActionEvent;)V: Cannot find
class javax/swing/text/JTextComponent
# Applet exception: class TwentyOne got a security violation: method
verification error
java.lang.VerifyError: TwentyOne
  at java.lang.ClassLoader.resolveClass(Compiled Code)
  at netscape.applet.AppletClassLoader.loadClass1(Compiled Code)
* at netscape.applet.AppletClassLoader.loadClass(Compiled Code)
  at netscape.applet.AppletClassLoader.loadClass(Compiled Code)
  at
netscape.applet.DerivedAppletFrame$LoadAppletEvent.dispatch(Compiled
Code)
  at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled
Code)
  at java.awt.EventDispatchThread.run(Compiled Code)
  at
netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled
Code)
****END OF ERROR ONE IN JAVA CONSOLE
Running it a second time gives:
****START OF ERROR TWO IN JAVA CONSOLE
# Applet exception: error: java.lang.NoClassDefFoundError: TwentyOne
java.lang.NoClassDefFoundError: TwentyOne
  at java.lang.ClassLoader.resolveClass(Compiled Code)
  at netscape.applet.AppletClassLoader.loadClass1(Compiled Code)
* at netscape.applet.AppletClassLoader.loadClass(Compiled Code)
  at netscape.applet.AppletClassLoader.loadClass(Compiled Code)
  at
netscape.applet.DerivedAppletFrame$LoadAppletEvent.dispatch(Compiled
Code)
  at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled
Code)
  at java.awt.EventDispatchThread.run(Compiled Code)
  at
netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled
Code)
****END OF ERROR TWO IN JAVA CONSOLE
Is it possible, that I have to add something to the applet-tag or do i
have to use an other version (embed-tag for example?)
here ist the html-file:
****START HTML - File
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
   <META HTTP-EQUIV="Content-Type" CONTENT="text/html;
charset=iso-8859-1">
   <META NAME="GENERATOR" CONTENT="Mozilla/4.06 [en] (Win95; I)
[Netscape]">
   <TITLE>Simple</TITLE>
</HEAD>
<BODY>
<APPLET CODE="TwentyOne" WIDTH=500 HEIGHT=500></APPLET>
</BODY>
</HTML>

****END HTML - File
--
Jan Sahner
Hirschberger Stra�e 58-64, Zi 42730
53119 Bonn
Tel.: 0228/666630
http://titan.cs.uni-bonn.de/~sahner

Re: SDK/JRE 1.2 using Netscape 4.5 instead of Appletviewer

#1277

Author: Alex
Date: Sun, 14 Mar 1999 00:00

5 lines
1019 bytes

i don't know too much about this but u might want to checkout the plugin
config of JRE1.2 into netscape, try if on IE4 to see where its Sun's prob or
netscape's

alex

Re: SDK/JRE 1.2 using Netscape 4.5 instead of Appletviewer

#1279

Author: lorenzo
Date: Wed, 24 Mar 1999 00:00

19 lines
1568 bytes

Hi!

You probably have to use a different HTML code to start your applet.
I could not actually see your HTML example, but you need to use the OBJECT-
tag with IE and the EMBED Tag with Netscape.

Otherwise, the JRE1.2 plug-in is not started, but the code is executed from
the built-in Java VM, which does not know
the javax.swing.* classes.

You can get example code for the HTML-code from Javasoft, as well as a HTML
converter for converting
APPLET-tags to JRE-1.2 tags that work with both IE and Netscape Navigator.

Ciao, Michael



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