Instantiating a Java class in native code.

Question

I'm trying to figure out how to instantiate a Java class in native code (C/C++) but no luck so far.
Given a class called DataPacket written in Java, how can I create in the native side of the code?
Any ideas?
Thanks.

Answer 1

chickenlips wrote:
Hi NiceGuy,
Thanks for responding. Yes MyClass.class is in the right place.
A call to env->ExceptionDescribe(); reveals that it can't find org\apache\commons\logging\LogFactory
Apparently, when I specified:
options[0].optionString = "-Djava.class.path=c:\My Workspace\JNITest"
vm_args.options = options;
It does not append to my classpath environment variable, but instead overwrites it.
My solution was to list out every jar files I was using and append them to the optionString. Is there a better way to do it?
A new question: Is there a way to append to the CLASSPATH environment variable using the java.class.path? Or should/could I have use the classpath option instead of the -D option?The 'classpath' option won't be recognized by the Invocation API. To append to the CLASSPATH environment variable, you call call getenv("CLASSPATH") in your native code and use strncat() to concatenate it with your option string.