Calling Java object/methods from C++

Radha News

Hi,

I am looking for reference books/tools/code samples for calling java
objects/methods from COM/C++ classes.

I am reasonably familiar with JNI. If you have used JNI, please let me know
of your experiences and things that I need to watch out. I have used JNI 1.1
and it had several bugs and limitations especially for C++ calling Java. Is
the newer version of JNI (version 1.4) any better?

Please send your reply to my email. Thanks for your help.

Radha
kr*****@cisco.c om

Jul 22 '05 #1

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5942

Evan Carew

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Hash: SHA1

Rhdha,

Well, I knew that you could use JNI to call C/C++ code, but was unaware
that you could do the reverse with it. Also, your experience with JNI
1.1 has been experienced by many others as well. Since then, I can
assure you that things have gotten more stable.

I have a feeling that should you wish to call JAVA objects from C++,
then you will be limited to the only tool chain available I know of
which can accomplish this, the GCC tool chain. Included you will find
GCJ ( http://gcc.gnu.org/java/ ) which is capable of hosting resonably
complex JAVA legacy libraries which can then be called by your new C++ code.

As for an example, it just so happens that there is a new plugin for
Mozilla provided by the GCJ project for running applets (why you would
want to do this, I'm not sure). While this might be a little large of an
example, their list server community might in turn be able to get you
started on your way.

Radha News wrote:

Hi,

I am looking for reference books/tools/code samples for calling java
objects/methods from COM/C++ classes.

I am reasonably familiar with JNI. If you have used JNI, please let me know
of your experiences and things that I need to watch out. I have used JNI 1.1
and it had several bugs and limitations especially for C++ calling Java. Is
the newer version of JNI (version 1.4) any better?

Please send your reply to my email. Thanks for your help.

Radha
kr*****@cisco.c om

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Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

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=QEF5
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Jul 22 '05 #2

Jim Sculley

Evan Carew wrote:

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Rhdha,

Well, I knew that you could use JNI to call C/C++ code, but was unaware
that you could do the reverse with it. Also, your experience with JNI
1.1 has been experienced by many others as well. Since then, I can
assure you that things have gotten more stable.

I have a feeling that should you wish to call JAVA objects from C++,
then you will be limited to the only tool chain available I know of
which can accomplish this, the GCC tool chain. Included you will find
GCJ ( http://gcc.gnu.org/java/ ) which is capable of hosting resonably
complex JAVA legacy libraries which can then be called by your new C++
code.

JNI allows any C/C++ code to call it. It is called the Invocation
Interface:

http://java.sun.com/docs/books/jni/h...oke.html#11202

Jim S.
--
Remove my extraneous mandibular appendages to reply via email.

Jul 22 '05 #3

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