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JNI UnsatisfiedLinkError

843829Oct 27 2009 — edited Oct 29 2009

Hi Sir/Madam,

I got stuck with an UnsatisfiedLinkError though I followed the Sun tutorial. Please help me solve the problem.

HelloWorld.java

class HelloWorld 
{
	private native void print();
	public static void main(String[] args) throws Exception
	{
		new HelloWorld().print();
	}
	static 
	{
		System.loadLibrary("Hello");
	}
}

Hello.c

#include <jni.h>
#include <stdio.h>
#include "HelloWorld.h"
JNIEXPORT void JNICALL
Java_HelloWorld_print(JNIEnv *env, jobject obj)
{
printf("Hello World!\n");
return;
}

I used Visual C++ to create Hello.dll

Now,

C:\Program Files\Java\jdk1.6.0_11\bin>javac HelloWorld.java

C:\Program Files\Java\jdk1.6.0_11\bin>javah -jni HelloWorld

C:\Program Files\Java\jdk1.6.0_11\bin>java -Djava.library.path=. HelloWorld
Exception in thread "main" java.lang.UnsatisfiedLinkError: HelloWorld.print()V
at HelloWorld.print(Native Method)
at HelloWorld.main(HelloWorld.java:6)

and when I used -verbose:jni,

C:\Program Files\Java\jdk1.6.0_11\bin>java -verbose:jni -Djava.library.path=. He
lloWorld
[Dynamic-linking native method java.lang.Object.registerNatives ... JNI]
[Registering JNI native method java.lang.Object.hashCode]
[Registering JNI native method java.lang.Object.wait]
[Registering JNI native method java.lang.Object.notify]
...
...
...
[Registering JNI native method sun.misc.Unsafe.tryMonitorEnter]
[Registering JNI native method sun.misc.Unsafe.throwException]
[Registering JNI native method sun.misc.Unsafe.compareAndSwapObject]
[Registering JNI native method sun.misc.Unsafe.compareAndSwapInt]
[Registering JNI native method sun.misc.Unsafe.compareAndSwapLong]
[Registering JNI native method sun.misc.Unsafe.putOrderedObject]
[Registering JNI native method sun.misc.Unsafe.putOrderedInt]
[Registering JNI native method sun.misc.Unsafe.putOrderedLong]
[Registering JNI native method sun.misc.Unsafe.park]
[Registering JNI native method sun.misc.Unsafe.unpark]
[Dynamic-linking native method java.lang.String.intern ... JNI]
[Dynamic-linking native method java.io.WinNTFileSystem.getBooleanAttributes ...
JNI]
[Dynamic-linking native method java.lang.System.mapLibraryName ... JNI]
[Dynamic-linking native method java.io.WinNTFileSystem.canonicalize0 ... JNI]
[Dynamic-linking native method java.lang.ClassLoader$NativeLibrary.load ... JNI]

[Dynamic-linking native method java.io.FileInputStream.initIDs ... JNI]
[Dynamic-linking native method java.io.FileDescriptor.initIDs ... JNI]
[Dynamic-linking native method java.io.FileDescriptor.set ... JNI]
[Dynamic-linking native method java.io.FileOutputStream.initIDs ... JNI]
[Dynamic-linking native method java.lang.System.setIn0 ... JNI]
[Dynamic-linking native method java.lang.Object.getClass ... JNI]
[Dynamic-linking native method java.lang.Class.forName0 ... JNI]
[Dynamic-linking native method sun.reflect.Reflection.getClassAccessFlags ... JN
I]
[Dynamic-linking native method sun.reflect.NativeConstructorAccessorImpl.newInst
ance0 ... JNI]
[Dynamic-linking native method sun.misc.VM.initialize ... JNI]
[Dynamic-linking native method java.lang.Runtime.maxMemory ... JNI]
[Dynamic-linking native method java.lang.System.setOut0 ... JNI]
[Dynamic-linking native method java.lang.System.setErr0 ... JNI]
[Dynamic-linking native method sun.misc.Signal.findSignal ... JNI]
[Dynamic-linking native method sun.misc.Signal.handle0 ... JNI]
[Dynamic-linking native method sun.io.Win32ErrorMode.setErrorMode ... JNI]
[Dynamic-linking native method java.lang.Compiler.registerNatives ... JNI]
[Registering JNI native method java.lang.Compiler.compileClass]
[Registering JNI native method java.lang.Compiler.compileClasses]
[Registering JNI native method java.lang.Compiler.command]
[Registering JNI native method java.lang.Compiler.enable]
[Registering JNI native method java.lang.Compiler.disable]
[Dynamic-linking native method java.lang.ClassLoader$NativeLibrary.find ... JNI]

[Dynamic-linking native method java.security.AccessController.doPrivileged ... J
NI]
[Dynamic-linking native method java.io.FileInputStream.open ... JNI]
[Dynamic-linking native method java.io.FileInputStream.readBytes ... JNI]
[Dynamic-linking native method java.io.FileInputStream.available ... JNI]
[Dynamic-linking native method java.lang.reflect.Array.newArray ... JNI]
[Dynamic-linking native method java.io.ObjectStreamClass.initNative ... JNI]
[Dynamic-linking native method java.io.FileInputStream.close0 ... JNI]
[Dynamic-linking native method java.io.WinNTFileSystem.list ... JNI]
[Dynamic-linking native method java.io.WinNTFileSystem.canonicalizeWithPrefix0 .
.. JNI]
[Dynamic-linking native method java.lang.ClassLoader.findLoadedClass0 ... JNI]
[Dynamic-linking native method java.lang.ClassLoader.findBootstrapClass ... JNI]

[Dynamic-linking native method java.security.AccessController.doPrivileged ... J
NI]
[Dynamic-linking native method java.util.zip.ZipFile.initIDs ... JNI]
[Dynamic-linking native method java.io.WinNTFileSystem.getLastModifiedTime ... J
NI]
[Dynamic-linking native method java.util.zip.ZipFile.open ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getTotal ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getEntry ... JNI]
[Dynamic-linking native method java.util.zip.ZipEntry.initIDs ... JNI]
[Dynamic-linking native method java.util.zip.ZipEntry.initFields ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.freeEntry ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getCSize ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getSize ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.getMethod ... JNI]
[Dynamic-linking native method java.util.zip.Inflater.initIDs ... JNI]
[Dynamic-linking native method java.util.zip.Inflater.init ... JNI]
[Dynamic-linking native method java.util.zip.Inflater.inflateBytes ... JNI]
[Dynamic-linking native method java.util.zip.ZipFile.read ... JNI]
[Dynamic-linking native method java.util.zip.Inflater.reset ... JNI]
[Dynamic-linking native method java.io.WinNTFileSystem.getLength ... JNI]
[Dynamic-linking native method java.lang.ClassLoader.defineClass1 ... JNI]
[Dynamic-linking native method java.io.FileOutputStream.writeBytes ... JNI]
Exception in thread "main" java.lang.UnsatisfiedLinkError: HelloWorld.print()V
[Dynamic-linking native method java.lang.Throwable.getStackTraceDepth ... JNI]
[Dynamic-linking native method java.lang.Throwable.getStackTraceElement ... JNI]

at HelloWorld.print(Native Method)
at HelloWorld.main(HelloWorld.java:6)

I dont understand what the problem could be. Please help me.

Thanks in advance.

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Locked on Nov 26 2009

Added on Oct 27 2009

#java-native-interface-jni

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