JVM language calling native language

[Arne Vajhøj]

Another little writeup.

VMS Tech Demo 17 - JVM language calling native language:
https://www.vajhoej.dk/arne/articles/vmstd17.html

Java/Groovy -> Fortran/Pascal/Basic/C

I have shown most of it before, but a little more detail here.

Arne

[Simon Clubley]

Post by Arne Vajhøj
Another little writeup.
https://www.vajhoej.dk/arne/articles/vmstd17.html
Java/Groovy -> Fortran/Pascal/Basic/C
I have shown most of it before, but a little more detail here.

Some typing errors:

combibations
linkedd
understand how to other scenaros [Also, how to _what_ ?]
nul terminated

You should also discuss briefly what reflection is. I've used the feature
and it's rather nice, but you can write full Java code without ever being
exposed to the concept.

Simon.

PS: Reading your overall usage sequence reminds me of just how much "fun"
JNI actually is. :-)

[Arne Vajhøj]

Post by Simon Clubley

Post by Arne Vajhøj
Another little writeup.
https://www.vajhoej.dk/arne/articles/vmstd17.html
Java/Groovy -> Fortran/Pascal/Basic/C
I have shown most of it before, but a little more detail here.

combibations
linkedd
understand how to other scenaros [Also, how to _what_ ?]
nul terminated

Fixed.

Thanks.

Post by Simon Clubley
You should also discuss briefly what reflection is. I've used the feature
and it's rather nice, but you can write full Java code without ever being
exposed to the concept.

I added a sentence.

I could write an entire article about reflection, but that sentence will
have to do for now.

Post by Simon Clubley
PS: Reading your overall usage sequence reminds me of just how much "fun"
JNI actually is. :-)

The overall problem of moving from a managed context to an unmanaged
context is inherently tricky.

But the JNI API is cumbersome to work with.

Which is why it is being replaced by Foreign Functions API
in Java 16 (preview only - still waiting for final version).

And why various wrappers like the well known JNA and my little VMS
specific thingy exist.

Arne

[Lawrence D'Oliveiro]

Post by Arne Vajhøj
I could write an entire article about reflection, but that sentence will
have to do for now.

Java makes it needlessly complicated.