NEWBIE HELP! java.lang.NoSuchMethodError Applet

[Mark]

Hi all,
im fairly new to the java world and need some help sorting an applet
problem im having. Ive developed an applet that reads in xml files
from the web - which works fine with appletviewer in eclipse, and the
applet itself works locally when it doesnt use the xml files.

However, when i try to run it in a web browser it just stays grey and
the java console reports:

java.lang.NoSuchMethodError:
com.esp.control.ESPCentralProcess.generateCourseData()Ljava/util/ArrayList;
at com.esp.gui.ESPStartUp.start(ESPStartUp.java:219)
at com.esp.gui.JPanelManager.panelAdd(JPanelManager.java:151)
at com.esp.gui.JPanelManager.init(JPanelManager.java:92)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

The methods seem to be fine cos it does run in eclipse and ive got JSE
1.4.2 installed, so im kinda stumped.

Any ideas where Im going wrong?

 

[Roedy Green]

However, when i try to run it in a web browser it just stays grey and
the java console reports:

Check that you have a decent Java installed in your browser. You may
be using a very old one that does not support ArrayLists.

See http://mindprod.com/wassup.html

 

[Andrew Thompson]

However, when i try to run it in a web browser it just stays grey and
the java console reports:

These sort of newbie questions should
be directed to c.l.j.help
<http://www.physci.org/codes/javafaq.jsp#cljh>

WHAT IS YOUR BROWSER!?!

I think if you will carefully search the
document linke to above, you might find
refernce to Internet Explorer. Several times.

If so, say so for further advice.

We need..
OS + version
Browser + version
and this..
<http://www.physci.org/pc/properties.jsp?prop=java.vendor+java.version>