This week's book giveaway is in the Android forum.
We're giving away four copies of Head First Android and have Dawn & David Griffiths on-line!
See this thread for details.
The moose likes JNLP and Web Start and the fly likes JApplet converted to Web Start application Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of Head First Android this week in the Android forum!
JavaRanch » Java Forums » Java » JNLP and Web Start
Bookmark "JApplet converted to Web Start application" Watch "JApplet converted to Web Start application" New topic
Author

JApplet converted to Web Start application

Isaac Hewitt
Ranch Hand

Joined: Jul 24, 2006
Posts: 191

I created a JApplet which can display a catalogue of images which are navigated via a CardLayout using the left and right arrow keys of the user's keyboard. It was created for FireFox under Windows Vista. I need to use Webstart to have it run properly with Internet Explorer under Vista.
I therefore converted the JApplet code to a JFrame. The application launches from my web server except the icon in the JFrame and the images do not display.





The line beginning with Toolkit is where the problem is. I cannot use the same code as in the JApplet to retrieve the images because I now have a JFrame.
Ulf Dittmer
Rancher

Joined: Mar 22, 2005
Posts: 42956
    
  73
Yes, I think Toolkit is only usable in applets. You can use the javax.imegio.ImageIO class to read files from an URL. That will hand you a BufferedImage object, which can be used wherever an Image can be used (and, as a bonus, in a few other places as well).
Paul Clapham
Sheriff

Joined: Oct 14, 2005
Posts: 19693
    
  10

Here's a quote from the Web Start tutorial:
Java Web Start provides limited support for applets through its built-in applet viewer. However, this is not intended to be a full- scale applet environment, such as the one provided by Java Plug-in. Java Web Start's applet viewer has certain limitations; for example, you cannot specify class files as resources, and it does not accept policy files.

So, Web Start does have some support for applets, at least in the most recent versions. I don't know whether this helps your particular situation or not.
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: JApplet converted to Web Start application
 
jQuery in Action, 3rd edition