CODEWITHSUNDEEP
java-native-interface
user494461
user494461

Reputation:

java JNI error java.lang.UnsatisfiedLinkError:

java -Djava.library.path=. TestJNI
>>>>

Exception in thread "main" java.lang.UnsatisfiedLinkError: TestJNI.calibrate([D[DII)[D
 at TestJNI.calibrate(Native Method)
 at TestJNI.main(TestJNI.java:61)

I know the library is getting loaded otherwise the error says cant find calibrate library. what does the above error mean?

EDIT

this is my implementation- 

JNIEXPORT jdoubleArray JNICALL Java_TestJNI_cailbrate (JNIEnv * env, jobject jobj, jdoubleArray rtt, jdoubleArray distance ,jint activecount,jint passivecount) {
jdoubleArray jresult = (*env)->NewDoubleArray(env,3);
 .......
return jresult;
}

are the parameters declared correctly?

Upvotes: 5

Views: 16139

Answers (2)

arkon
arkon

Reputation: 2296

Another cause of this cryptic error is when you import the incorrect <jni.h> file. For instance, if you are compiling against x86 but point your includes path to the x64 flavor of the header.

Upvotes: 2

Angelo van der Sijpt
Angelo van der Sijpt

Reputation: 3641

This message means that Java is looking for a native method that looks like the Java method

double[] calibrate(double[], double[], int, int)

If you have generated your header files correctly, and built the library, this most likely means you are missing the implementation of that method.

Some things that come to mind:

  • Did you rebuild the library after you implemented the method?
  • Did you happen to change the interface of the Java method after you built the library?

Upvotes: 7

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