• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 1092
  • Last Modified:

switch applet vs. japplet depending on java version

I have two chat rooms, one based on Applet, one based on JApplet.  I want the JApplet to be used if the JVM version supports it.

I know to get the version (and vendor, if I like), easily enough from the System properties:
  System.getProperty("java.version")
  System.getProperty("java.vendor")

But I can't think of anything nifty for a way to actually manage classloading or whatnot.  I'm already inside the instantiated class when things begin, so it's already either an applet or a japplet.

I found a nifty javascript version detection script, but it only works for non-IE browsers, and I'd really prefer to do it inside a single jar; let it decide for itself.

if you go to http://nfg.ca/ you can see the chatroom (link: "chat" at the top of the screen) and see the javascript pains I'm going to at the moment. :)
0
nentwined
Asked:
nentwined
  • 5
  • 2
1 Solution
 
objectsCommented:
you'll need to implement that in your html, and not in your applet.
0
 
objectsCommented:
although you could try loading an Applet which checks the version and then embeds the required applet inside itself (applets are just components so can be added like any other).
0
 
objectsCommented:
probably easier though to implement in your html using the <object> tag.
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
nentwinedAuthor Commented:
can you use the object tag to specify which version of java is required for it?

I just implemented an applet which checks version and then redirects to a different page depending; that was painless enough.

As for embedding, I was worried about values being passed on down the line, such as parameters and whatnot.  But it's a plausibility.

how backwards-compatible is the object tag?
0
 
objectsCommented:
The object tag can only be used for loading the plugin (and thus use JApplet), if it isn't present then you can use applet tag (to load Applet).

> I just implemented an applet which checks version and then redirects to a different page depending; that was painless enough.

thats a good solution.
0
 
nentwinedAuthor Commented:
I'll have to look into the object tag.  Thanks both for your ideas. :)
0
 
objectsCommented:
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

  • 5
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now