Putting Applets Online

Hey, quick and very dumb question:
I use BlueJ, and when I compile my project, it creates a variety of different files (.java, .ctxt, .class). Which one(s) do I need to put in a directory online to be able to run that applet on an html file? I believe it's the .java one, but I'm not 100% sure. Any help would be great.

Oh, one more question:
I used keylisteners and mouselisteners in the applet.
BlueJ generated a few extra .class files for these,
, even though they're embedded in my other classes.
Do I need to include these extra files?Yes. From each .java file may get created one or more .class files - one for each actual class. Those listeners etc are actually classes in their own right (probably mainly what are called "anonymous inner classes").

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My applet can access an image in Eclipse, but not when I put it online...

Basically, I have an applet that displays images among other things.
I stuck the images in the bin directory, and when I run the applet from Eclipse, there's no problem.
But when I put the applet on my webpage, it crashes with a NullPointerException because
image = ImageIO.read( new File( imageName ) ) can't seem to get the image.
The images are in the same directory as my class files. I tried turning on all permissions.
My html code is very simple:
<applet code="ImageGenerator.class" width=1000 height= 500> </applet>
Am I missing anything?
Any idea what the problem is?

Meteor,
Can you shed some light on how big these files are?
If these images are 200K each and you have 10 of them, then you're loading 2MB across the network each time the application loads. Depending on what you are doing, that may not be a good design.
If these slow-loading images are needed right away, then embed them with your applet (preferably a Jar) and they should load pretty fast.
If these slow-loading images are needed later, then thread the loading of them to a background task and use some form of visual feedback (like a "please wait" image) until they're finished.
Lastly, if these images are relatively small and you are experiencing a significant speed difference between accessing them locally (such as on the server's file system or through a mapped-drive) and accessing them through http (or url, etc) then make sure your web server is feeding them up in a timely fashion and that there's no outstanding issues with the URL loading method and the Java version you're using.
Please read Andrew's posts closely as you should not be designing an applet that loads files as a local resource unless you really need to. Signing the applet will allow you to save them locally to the filesystem (as a "cached" version to be loaded later), but don't try to load the images as files directly from the web server's file system. The signed applet will only be able to access the local file system of the station it's being run on, hence, usually not the server!
As far as caching the files locally, Java webstart has potentially a better ways of doing that sort of stuff for you.
-Tres

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nhw1908 wrote:
> I am trying insert collapsible panels at
>
http://www.udel.edu/History/testgrad/prospective/prostud.html
site. They work
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Hi everyone-
i've converted my application to a JApplet and it works fine in applet viewer. however, it will not work when I try to open up my html file with any browser. It won't work on my machine or on teh server. I have in one folder my html file, all of the needed class files, and even a jar file. I took care of any security issues and such too. However, when i open my applet in netscape, a dialog pops up which says that either the class or filename of my html file [or one of its components] is wrong, or i don't have all of the required libraries.
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java.lang.ClassFormatError: Bad major version number
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at netscape.applet.AppletClassLoader.loadClass(Compiled Code)
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at netscape.applet.AppletClassLoader.loadClass1(Compiled Code)
* at netscape.applet.AppletClassLoader.loadClass(Compiled Code)
at netscape.applet.AppletClassLoader.loadClass(Compiled Code)
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at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled Code)
at java.awt.EventDispatchThread.run(Compiled Code)
at netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled Code)
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please please help! I would greatly appreciate it.
Thanks :)

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What computer operating system?
What router, encryption and ISP?
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"Back.png" refers to a picture of the back of the card. I have this picture, along with the other 52 card pictures uploaded to the website (i'm hosting on Netfirms). Please help me. I'm willing to share any necessary source code if the need arises.

You're trying to read the images off the local hard drive or from a server other than the one the applet came from.
That's normally not allowed.
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The subscriptions to the iCloud calendars can be found here.
Please help.

henrikda wrote:
The link sent in the e-mail doesn't correspond to a public webpage ...
Ah, I see what you mean. My apologies for the RTFM response without testing it myself first.
I think iCloud shares calendars using the CalDAV standard. This means that you'll have to open the link using a client that can understand this. I just tested it with Novell GroupWise at work and it worked fine. I suspect it might also work with Outlook. I tried to add the calendar in Google Calendar by clicking under Other Calendars, Add by URL, but that did not work, so Google Calendar may not be a CalDAV client. For more information see
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http://en.wikipedia.org/wiki/CalDAV
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http://caldav.calconnect.org/implementations/clients.html
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Putting Applets Online

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