JNI GetMethodID always return zero

[Kiran]

Hi,

What could be the possible reason behind GetMethodID call failure?
What wrong with following code...

jclass resourceClass = env->FindClass( "java/util/ResourceBundle" );
jmethodID mid = env->GetStaticMethodID( resourceClass,
"getBundle",
"(Ljava/lang/String;Ljava/util/Locale;Ljava/lang/ClassLoaderLjava/util/ResourceBundle");

FindClass works ok, so I assume VM is initialized well, but I might be
wrong?

Platform: Windows, JDK 1.4.

Thanks,
Kiran

 

[Chris Uppal]

[...]oaderLjava/util/ResourceBundle");

<sympathy/>

You should have a ';' before the closing quote.

-- chris

 

[Kevin McMurtrie]

Hi,

What could be the possible reason behind GetMethodID call failure?
What wrong with following code...

jclass resourceClass = env->FindClass( "java/util/ResourceBundle" );
jmethodID mid = env->GetStaticMethodID( resourceClass,
"getBundle",
"(Ljava/lang/String;Ljava/util/Locale;Ljava/lang/ClassLoaderLjava/util/Resou
rceBundle");

FindClass works ok, so I assume VM is initialized well, but I might be
wrong?

Platform: Windows, JDK 1.4.

Thanks,
Kiran

Making JNI signatures is a hassle. Try using reflection to get that
Method in Java and then call toString() on it. If I recall correctly,
the signature is the same as used by JNI.

 

[Chris Uppal]

Try using reflection to get that
Method in Java and then call toString() on it. If I recall correctly,
the signature is the same as used by JNI.

Unfortunately not. At least in 1.4.2, that returns a Java-style declaration.
That feature (or something like, say, getJNIString()) would be very handy,
though.

-- chris

 

[Gordon Beaton]

Making JNI signatures is a hassle.

Not if you cut and paste from the output of javap -s.

/gordon

 

[Kiran]

Resolved!

Problem in following code was due to incorrect signature for return value...