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Editorial Team
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Asked: 2026-05-24T14:12:27+00:00

#define JNI_DECLARE( classname, methodname ) \ classname ## methodname( JNI* env ) #define JAVA_CLASS

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#define JNI_DECLARE( classname, methodname ) \
     classname  ## methodname( JNI* env ) 

#define JAVA_CLASS Java_com_example
void JNI_DECLARE( JAVA_CLASS, open ) {}

This expands to:

void JAVA_CLASS_open( JNI* env ) {}

How do I get:

void Java_com_example_open( JNI* env ) {}

?

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1 Answer

  1. Editorial Team
    #define JNI_DECLARE_INNER( classname, methodname ) \
     classname  ## _ ## methodname( JNI* env )
#define JNI_DECLARE( classname, methodname ) \
     JNI_DECLARE_INNER(classname, methodname)

    see more here: C Preprocessor, Stringify the result of a macro

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