Granny's Programming Pearls
"inside of every large program is a small program struggling to get out"
The moose likes Applets and the fly likes Applets choosing preferred JRE version Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login

Win a copy of OCA/OCP Java SE 7 Programmer I & II Study Guide this week in the OCPJP forum!
JavaRanch » Java Forums » Java » Applets
Bookmark "Applets choosing preferred JRE version" Watch "Applets choosing preferred JRE version" New topic

Applets choosing preferred JRE version

Sugantha Jeevankumar
Ranch Hand

Joined: Jun 06, 2007
Posts: 93
Hi.. I have a scenario where a machine has JRE 1.5 and a higher version, say JRE 1.6_11. My applet, when deployed supports only JRE 1.5. Is there an option to set the preferred JRE version when a specific applet is loading.

Changing the JRE version in Java Control panel and the browser's options are not the desired solutions because the customer wants all other applets to work with JRE 1.6 and this particular applet to work with JRE 1.5. Is there a way to do this..? Thanks in advance..

SCJP 5.0
Ulf Dittmer

Joined: Mar 22, 2005
Posts: 42364
I think you're going about this the wrong way. A much better way would be to ask: "why is the code not compatible with Java 6?" and then to address that issue.

Ping & DNS - my free Android networking tools app
Sugantha Jeevankumar
Ranch Hand

Joined: Jun 06, 2007
Posts: 93
Actually, We have tried running the application with JRE 1.6 and there are a lot of compatibility issues to handle like,

Discrepancies in the way mouse events behave.
The application closing down suddenly.

This application is a huge legacy app and right now it is not practical for us to migrate the same to 1.6 JRE. What the customer would like to have is a workaround, so that the this application can use JRE 1.5 in a machine with JRE 1.5 and 1.6.
Sugantha Jeevankumar
Ranch Hand

Joined: Jun 06, 2007
Posts: 93
I found out a way to do this... by editing the classid attribute of Object tag to..

classid="clsid:CAFEEFAC-0015-0000-0000-ABCDEFFEDCBA" . This ensures 1.5 version of JRE gets used.
I agree. Here's the link:
subject: Applets choosing preferred JRE version