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What are the JNICALL and JNIEXPORT and JNIEnv symbols used in writing the native code under JNI?

April 26, 2017code JNI native Symbols Used writing

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What are the JNICALL and JNIEXPORT and JNIEnv symbols used in writing the native code under JNI?

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JNIEXPORT and JNICALL are preprocessor defined constants specific to each platform. You can find them in the machine-dependent header file jni_md.h under java/include/hp-up or java/inlcude/solaris for example. These are usually defined as null strings. The JNIEnv is a typedef defined in jni.h. It provides access from the native code to Java objects.