jni.h: no such file or directory

Question

I'm using Code::Blocks in windows.

I created a dll project trying to get some JNI practice.

In my .h file generated by javah, there's #include jni.h, but when I try to compile it, it keeps saying jni.h: no such file or directory.

I think it has something to do with classpath, but I don't know what it is! It's probably setting that I have to change in Code::Blocks

Could someone please help me to fix it? many thanks

/* DO NOT EDIT THIS FILE - it is machine generated */ #include <jni.h> /* Header for class Vector3D */  #ifndef _Included_Vector3D #define _Included_Vector3D #ifdef __cplusplus extern "C" { #endif /*  * Class:     Vector3D  * Method:    magnitude  * Signature: ()D  */ JNIEXPORT jdouble JNICALL Java_Vector3D_magnitude   (JNIEnv *, jobject);  /*   * Class:     Vector3D  * Method:    mult  * Signature: (LVector3D;I)LVector3D;  */ JNIEXPORT jobject JNICALL Java_Vector3D_mult   (JNIEnv *, jobject, jobject, jint);  /*  * Class:     Vector3D  * Method:    equals  * Signature: (LVector3D;)Z  */ JNIEXPORT jboolean JNICALL Java_Vector3D_equals   (JNIEnv *, jobject, jobject);  /*  * Class:     Vector3D  * Method:    dotProduct  * Signature: (LVector3D;LVector3D;)D  */ JNIEXPORT jdouble JNICALL Java_Vector3D_dotProduct   (JNIEnv *, jclass, jobject, jobject);  /*  * Class:     Vector3D  * Method:    makeNormalized  * Signature: (LVector3D;)LVector3D;  */ JNIEXPORT jobject JNICALL Java_Vector3D_makeNormalized   (JNIEnv *, jclass, jobject);  /*  * Class:     Vector3D  * Method:    crossProduct  * Signature: (LVector3D;LVector3D;)LVector3D;  */ JNIEXPORT jobject JNICALL Java_Vector3D_crossProduct   (JNIEnv *, jclass, jobject, jobject);  #ifdef __cplusplus } #endif #endif 

EDIT:
So I did Settings-->Compiler and debugger-->Search directories-->and added "$(JAVA_HOME)\include" and "$(JAVA_HOME)\include\win32" under Compiler, and it was able to find it!

Answer 1

You have to add the JDK path to the include path, so the compiler knows the location of the file.

Windows:

/I "$(JAVA_HOME)\include" /I "$(JAVA_HOME)\include\win32" 

Linux:

-I"${JAVA_HOME}/include" -I"${JAVA_HOME}/include/linux" 

Mac:

-I"${JAVA_HOME}/include" -I"${JAVA_HOME}/include/darwin"