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JNI: How can i check if jobject is a null object in native c code
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jobject thiz means the this in java class. Sometimes if you create a static native method like this. void Java_MyClass_method1 (JNIEnv *, jclass); jclass means the class itself. Follow this answer to receive notifications.
JNICALL contains any compiler directives required to ensure that the given function is treated with the proper calling convention.
typedef jobject jclass; In C++, JNI introduces a set of dummy classes to enforce the subtyping relationship. For example: class _jobject {}; class _jclass : public _jobject {}; ...
jobject NewGlobalRef(JNIEnv *env, jobject obj); Creates a new global reference to the object referred to by the obj argument. The obj argument may be a global or local reference.
Since the objects in Java and C code actually use the same memory locations (the object passed to the native code is the same memory reference in both worlds), a simple
if (someJObject == NULL) {} in the C code should be just fine I guess. I haven't tested it though :-)
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