Setting java.library.path programatically

[Aaron Fude]

Hi,

Is there a way to modify java.library.path in the code?

I try the following in Windows

System.setProperty("java.library.path", "C:\\My\\Library\\Path;" +
System.getProperty("java.library.path"));
System.loadLibrary("MyLibrary");

....but it can't find it. (Everything works when I stick MyLibrary.dll
physically in one of the directories in the original path.)

Should what I'm trying to do work in principle? Thanks!

Aaron Fude

 

[Gordon Beaton]

Is there a way to modify java.library.path in the code?

I try the following in Windows

System.setProperty("java.library.path", "C:\\My\\Library\\Path;" +
System.getProperty("java.library.path"));
System.loadLibrary("MyLibrary");

...but it can't find it. (Everything works when I stick
MyLibrary.dll physically in one of the directories in the original
path.)

Should what I'm trying to do work in principle? Thanks!

No.

AFAIK, Java doesn't actually search for the shared library. Like many
of the system properties, the value in java.library.path is just
"f.y.i." and changing it doesn't actually change the behaviour of the
JVM.

On Unix, the dynamic linker (not the JVM!) searches for shared
libraries using a preconfigured path as well as the directories in the
user's LD_LIBRARY_PATH setting. On Windows, DLLs are loaded from the
PATH (although I don't know who does this search).

If you want to load a library from a specific location, you can use
System.load() instead (at the cost of some platform independence).

/gordon