I'm writing an application that uses native code (which I didn't write) which is bundled in several DLLs. I put them into a folder \lib.
At first when I ran the app, it complained that it could not find main.dll (which is the DLL that depends on all others). So then, I tried setting -Djava.library.path and it found main.dll, but still gave me an error "can't find dependent libraries".
I read from http://dev.eclipse.org/new
However, I would prefer not having to set environment variables.
Some more background info... I was actually able to use the same native code DLLs in a simpler project that just had all the source code and classes in the project root directory, which had all the DLLs too. I could do this without setting java.library.path or PATH. So I feel that it should be possible to do the same for the more complex project too.
One thing that puzzles me is why for the simple project, I didn't have to do anything (beside setting the classpath) and Windows was able to find the other DLLs that main.dll depends on but in the more complex project, Windows couldn't find them.
Any direction or hints would be greatly appreciated. Thanks!
This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.
Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.
If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.
Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.
Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.
Access the answers to your technology questions today.
30-day free trial. Register in 60 seconds.
Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.
Try it out and discover for yourself.
30-day free trial. Register in 60 seconds.
Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.
add the path of your DLL into the system path before executing your java code.
String newLib = "C:/Your Path";
String system_path = System.getProperty("java.l
String path_seperator = System.getProperty( "path.separator" ); // ":" for unix, ";" for windows
System.setProperty("java.l
maheshexp,
Setting the java.library.path will not work because Windows only uses it main.dll but then goes back to using PATH for the dependent dlls. Therefore, I get a "can't find dependent libraries" error.
CEHJ,
Yes, you're right, but I was just planning on dumping the .dll and .so files in /lib. As long as Java can find the libraries, then it doesn't matter what OS I'm using.
Oh, no, I meant myapp\lib. Basically, I want the .dlls and .so files to be contained in the application directory.
Do you know how Windows checks for library files? Because I know that when my app didn't have packages and everything was lumped into myapp\, it worked. But myapp\ isn't in the Windows PATH variable so I'm a little confused as to why it worked in that scenario.
>>Setting the java.library.path will not work because Windows only uses it main.dll but then goes back to
The all the required library files are always detected in the path stored in the property "java.library.path".
It's not that for few DLLs it will take the java.library.path and for others it takes another path :-)
Oh, no, sorry, I didn't mean unsuitable. I just meant that I didn't get an answer that I was hoping for.
The thing is that I was able to make work if I dumped it all the dll and so files (both platforms) into the myapp/ root directory so that isn't platform-specific. Because of this, I was hoping for a platform-unspecific solution for my situation, which had packages. Perhaps this was impossible.
Please don't misunderstand! I really do appreciate everything that you did to help and that's why I wrote to give you a portion of the points, but to give the full amount of points for a problem that I still have seems expensive, especially since this is my last 500 points, :(
Business Accounts
Answer for Membership
by: CEHJPosted on 2007-09-29 at 12:02:26ID: 19984970
Copy all dlls to %WINDIR%