Aus der KBASE:
Title:
Error: "java.lang.classNotFoundException: lotus.notes.apps....." Loading Web Page with Java Applet
Product: Lotus Domino > Lotus Domino Server > 5.x
Platform(s): Platform Independent
Document Number: 1089304 Date: 20.10.2003
This document is based on the following :
About SPRs
Problem
Using Microsoft Internet Explorer to access a Domino web page that contains an embedded Java Applet such as the ActionBar, Editor, View or Outline applet, the following error message displays and the applet does not load:
"java.lang.classNotFoundException: lotus.notes.apps.<applet>.<Applet>.class"
For example, when using Microsoft Internet Explorer 6.0 to access Domino Webmail, the following error displays where the Action Bar should display:
"java.lang.classNotFoundException: lotus.notes.apps.actionbar.ActionBar.class"
This error occurs when the Sun JVM installed on the user's machine is unable to interpret the cab file that is automatically sent by the Domino server to any Internet Explorer browser.
This issue has been addressed in Domino 5.0.12 and 6.0.
Prior to 5.0.12, to resolve the problem with the applets loading, the user will not be able to use the Sun JVM with Microsoft Internet Explorer 6. There is normally an Internet Explorer Options setting to disable the use of the Sun JVM, but that requires that another available JVM be present on the machine.
The second issue is documented in document 1090461, "View Applet Intermittently Fails to Display Using Microsoft Internet Explorer 6" and has been addressed in Domino 5.0.11.
Excerpt from the Lotus Notes and Domino MR fix list (
http://www.lotus.com/ldd/r5fixlist.nsf):
Web Server - Action Bar Applet
SPR# JLIO4ZVARX - Buttons were not displayed on Applets when using Internet Explorer 6.0.
If the server has not been upgraded, it is possible, on some systems, to de-activate the Sun JVM. This is only possible if using Microsoft Windows XP without Service Pack 1a. That service pack removes the Microsoft JVM requiring users to use the Sun JVM.
As part of the install and setup of SDK 1.3, a new section is added to the Internet Options in Microsoft Internet Explorer. This new section is titled Java (Sun) and contains the option "Use Java 2 v1.3.1_02 for <applet> (requires restart)" which is enabled by default (see graphic below). Disabling this option resolves the problem.
The new property can be found by selecting Tools, Internet options from the menu of the browser, switching to the Advanced tab and then going to the Java (Sun) section.
SDK 1.3 can be installed on a user's machine from a variety of sources, such as when installing Microsoft Window XP which installs and uses SDK 1.3.