Eclipse (Helios) fails to load DLL

Question

My Java program fails with the following error on Windows.

Exception in thread "main" java.lang.UnsatisfiedLinkError: no XSvcSocket in java.library.path
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)

I tried different things like

• adding the location of DLL to system's path env variable

• setting location of DLL explicitly in the program as below

          String libpath = System.getProperty("java.library.path");
          libpath = "C:\\extlibs;" + libpath;
          System.setProperty("java.library.path", libpath);
          libpath = System.getProperty("java.library.path");
  

java.library.path I get see is shown below.

"Lib Path: C:\extlibs;C:\Program Files\Java\jre6\bin;.;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows"

The DLL in question is available in "C:\extlibs". Couple of observation are that when I place the DLL into "C:\Program Files\Java\jre6\bin", my program doesn't crib about the DLL (i.e it loads it) but I have to take care of many other DLLs too.

Can anyone shed some light on this behavior? by the way I am also not able to figure out from where eclipse is picking C:\Program Files\Java\jre6\bin and adding to java.library.path? it's not part of system's path environment variable.

Answer 1

The correct way to add native libraries in eclipse is as shown below. Go to Properties/Java Build Path/Libraries/Expand the jar file for which you want to add the native library/Select Native Library location/Click Edit/Add the DLL