Java in C++?

[XerxesTheMighty]

Is there any way to input a java code into a c++ program?
I once saw ASM put into c++ (ASM code surrounded by '__asm'), so I was just wondered if c++ could also do java.

 

[palbano]

nope

-pete

 

[chipperMDW]

You can call a Java program from a C++ program, and you can combine C++ and Java in other ways, but you can't embed Java code directly into C++ code.

 

[palbano]

>> You can call a Java program from a C++ program

How do you do that?

-pete

 

[chipperMDW]

The same way you'd call any other program:

system( "java javaprog.class" );

Or exec* in *nix.

Or the Windows equivalent (CreateProcess?) in Windows.

All assuming you have PATH and CLASSPATH and whatever else set correctly for java to work.


i.e. There's no special, specific support in C++ to call Java programs, just general process creation support that can be used to create a process that happens to be a Java program (or, more precisely, the Java interpreter interpreting a Java program).

 

[chipperMDW]

Also, I suspect you could probably hijack the Java plugin that's provided for browsers and use the Java interpreter from your program. That way you could interpret .class files directly from a C++ program.

Interesting...

 

[bcravens]

If you really wanted to you could have your c++ code write out a java.class and then execute it as suggested above. Writing out the code from within c++ will save you from distributing another file.

 

[palbano]

Oh, the term "call" confused me. I normally use that in the context of a "function call". Startig process i ususally refer to with "launch" or "spawn".

-pete

 

[chipperMDW]

Oh, sorry. I'm glad you made me think, though; I'm wondering about using that plugin now...


Anyway, there's no Standard way to call a Java function (er, method) from C++, but on some compiler, if you had a JIT-compiled java class to link in, you might be able to do something like:

extern "Java" void SomeClass___SomeFunc();

Or maybe something cleaner, like declaring a C++ class to be extern "Java" or having a predefined Java "Globals" class.

The Java method would probably have to be static for this usage to make any sense.


In other words, a compiler could let you call a Java function directly, but no one says it has to.