Comments on: JNI (Java Native Interface): Exception in thread “main” java.lang.UnsatisfiedLinkError: Can’t find dependent libraries

By: Kai Witte

Kai Witte — Tue, 09 Mar 2010 14:45:14 +0000

hello Franklin,

I’d say either the native binary is not found or it doesn’t contain what you need.

Did you compile it with gcc –add-stdcall-alias? Did you check out which functions the binary contains? Did it contain sendechotohost? Is it in the runtime PATH?

By: franklin

franklin — Tue, 09 Mar 2010 14:33:32 +0000

Exception in thread “main” java.lang.UnsatisfiedLinkError: sendechotohost
at NativePing.sendechotohost(Native Method)
at NativePing.getResultForTheHost(NativePing.java:517)
at NativePing.pingHost(NativePing.java:396)
at NativePing.pingHost(NativePing.java:422)
at NativePing.pingHost(NativePing.java:384)
at NativePing.main(NativePing.java:616)

In Linux I am getting this error. Can any one explain….

By: degree

degree — Fri, 12 Feb 2010 09:17:20 +0000

just need to build the helloworld.c following way

cl -I c:\Java\jdk1.6.0_01\include -I c:\Java\jdk1.6.0_01\include\win32 -LD HelloWorld.c -FeHelloWorld.dll

Not with -MD option. Java load library functions are not able to load because of -MD option. I think JNI documentations should be updated.

By: Manoj

Manoj — Wed, 27 Jan 2010 09:12:22 +0000

add option “-Wl,–kill-at”

`–kill-at’
Specifies that when `dlltool’ is creating the
exports file it should not append the string
`@ ‘. These numbers are called
ordinal numbers and they represent another
way of accessing the function in a DLL, other
than by name.

With this the problem will go away sure shot.

By: Amaresh

Amaresh — Wed, 11 Nov 2009 10:19:06 +0000

Wow !!
Thanks so much.

This topic helped me getting started with Java -> JNI -> DLL.

Thanks

By: nethibernate

nethibernate — Sun, 09 Aug 2009 14:48:42 +0000

Thanks Alexandra, your insight really works.
I got the same problem with Kai. I think it’s not about the procedure name. If you remove the “-MD” option when you link the C file, it can work.

By: Kai Witte

Kai Witte — Wed, 22 Jul 2009 19:30:03 +0000

Hello,

is that all the error message you get? Delete the .dll, try again. When it is still the same message, then you know more about the problem. Otherwise you know more as well. Win-win.

Kai

By: Look Out

Look Out — Mon, 20 Jul 2009 12:28:36 +0000

I have a problem creating a simple Java Application that uses JNI to load a dll that prints the mesage “HelloWorld”.

The following stages were succesful:
1. Creating the HelloWorld.java file and compiling it.
2. Using javah -jni to produce HelloWorld.h (a C/C++ header file)
3. Coding the HelloWorld.c file and compiling it to get:
a) HelloWorld.exp, HelloWorld.dll, HelloWorld.lib, HelloWorld.obj

The stage where I am failing:
1. Running the Java program using: java HelloWorld at the command line produces the following error:
Exception in thread “main” java.lang.UnsatisfiedLinkError: HelloWorld.helloWorld
()V
at HelloWorld.helloWorld(Native Method)
at HelloWorld.main(HelloWorld.java:8)

C:\>
For compilation purposes I am using the Microsoft Visual C++ 2008 Express Edition’s command line utility

What could be the problem with my program

Thanks in anticipation of the best help you can offer

By: Kai Witte

Kai Witte — Tue, 07 Jul 2009 15:44:03 +0000

Thanks Alexandra,

your insight will help many people! This post gets lots of hits every day :-)

Kai

By: Alexandra Niculai

Alexandra Niculai — Tue, 07 Jul 2009 14:58:28 +0000

So, I searched a lot, but I found a solution that worked for me. Removing the -MD gives you this:
cl -Ic:\java\include -Ic:\java\include\win32 -LD HelloWorld.c -FeHelloWorld.dll

For me, it worked! For the rest, I can’t speak C++ and I don’t know why it happened.