I want to write a C++ program which calls Java method.
I am trying to invoke a Java function from C++. As described here
http://docs.oracle.com/javase/6/docs/technotes/guides/jni/spec/invocation.html
but I get this error while debugging and can not handle it.
I m using Visual studio 2012.
Here is my code C++ code.
#include "stdafx.h"
#include <jni.h> /* where everything is defined */
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{
JavaVM *jvm; /* denotes a Java VM */
JNIEnv *env; /* pointer to native method interface */
JavaVMInitArgs vm_args; /* JDK/JRE 6 VM initialization arguments */
JavaVMOption* options = new JavaVMOption[1];
options[0].optionString = "-Djava.class.path=C:\Users\yv\workspace\JNI\bin"; // my class is under this directory.
vm_args.version = 0x00010006;
vm_args.nOptions = 1;
vm_args.options = options;
vm_args.ignoreUnrecognized = false;
/* load and initialize a Java VM, return a JNI interface
* pointer in env */
JNI_CreateJavaVM(&jvm, (void **)&env, &vm_args); // I got err msg "cannot convert parameter 2 from 'JNIEnv **' to 'void **' " so added (void **) as described in some other sources
delete options;
jvm->DestroyJavaVM();
return 0;
}
Java installed on my comp version is
C:Usersyv>JAVA -version
java version "1.7.0_17"
Java(TM) SE Runtime Environment (build 1.7.0_17-b02)
Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode)
and my java code in case of need.
public class jniClass {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("Hello, World!");
System.out.println("Arguments sent to this program:");
if (args.length == 0) {
System.out.println("(None)");
} else {
for (int i=0; i<args.length; i++) {
System.out.print(args[i] + " ");
}
System.out.println();
}
}
}
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