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  Native libs in Applets  (Read 786 times)
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Offline TheAnalogKid

JGO Coder


Projects: 2



« Posted 2006-02-16 17:36:53 »

Hi,

I'm wondering if it's possible to load native libs in an applet? If yes how? Simply with the archive attribute?

Also, how can I set system properties in the applet html descriptor?

Thanks

Offline Linuxhippy

Senior Duke


Medals: 1


Java games rock!


« Reply #1 - Posted 2006-02-16 19:41:46 »

Hi!

1.) Thats quite simple:
- Your applet has to be signed - run withought any security restrictions
- Your native library has to be copied somewhere out of the jar to a disk of you user's computer. (Since lib-loading is os-dependant and os can't load libs out of jav-files of course)
- Just load the lib via System.load***

But i really would not do that - it limits your app to less than one platform (in case of windows even win64 is problematic), ask yourself wether you really need this or it would be just cool to have it.

2.) I don't know any way setting system properties via the html-parameters, if you think about setting java2d related properties you can almost forget it since AWT is already initialized when the applet executes custom code - so you've to live with what you get.

lg Clemens
Offline TheAnalogKid

JGO Coder


Projects: 2



« Reply #2 - Posted 2006-02-16 19:48:56 »

Thanks for your answer.

Quote
But i really would not do that - it limits your app to less than one platform (in case of windows even win64 is problematic)
It could work at least for Windows. Think about all the native libs from LWJGL, GAGE timer, ... One problem is to make sure to load the correct libs according to the platform.

Quote
ask yourself wether you really need this or it would be just cool to have it.
The purpose is to be able to use gaming libs that use native libs for hardware acceleration or other harware related things. I though it would be obvious.

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Offline Linuxhippy

Senior Duke


Medals: 1


Java games rock!


« Reply #3 - Posted 2006-02-16 20:52:16 »

Yes for libraries like lwjgl the challange is to figure out which libraries to load, but loading the libraries itself works (surprisingly) well ... I never enountered any problems.

Yes I've answered this question many times (at least 3-4x) and most of the time at forum.java.sun.com where people think about access to win32 and stuff like that. I simply did not think far enough Wink

Good luck, lg Clemens
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