On Wed, May 22, 2002 at 11:36:06PM +0200, Pac wrote: | | [...] | dman> $ ./a.out | dman> Hello World | | thanks but I all ready knew that !!! :-). | dman> | dman> | into a library and to use it into | dman> | | dman> | a GTK+ application | dman> | a Qt application | dman> | | dman> | ?? | dman> | dman> To make use of existing C/C++ libraries requires writing JNI (or CNI) | dman> bridge code in C/C++ to provide a Java interface that your Java code | dman> can access. GCJ doesn't provide auto wrappers like that, it just | dman> turns your java source into native binaries. | | I dont want to use a C/C++ library inside a java programm, I whave a | set java classes compiled into a native library (with compilation | option shared from gcj) and want to use this library into a Qt or GTK+ | application. Oh, I see. | Isnt it possible ? Anything is possible ... though the effort required varies :-). | See this from http://gcc.gnu.org/gcc-3.1/changes.html : | | " # JNI and CNI invocation interfaces were implemented, so gcj-compiled Java code can now be called from a C/C++ application. I didn't know that. That's a good feature to have. I guess you'll have to RTFM the gcc docs to find out what that API is. Maybe it works just like compiling a C++ library except that you'll be missing the C++ header files (unless it can generate them too). | dman> | dman> For GTK+ you can take a look at http://java-gnome.sourceforge.net/. | | thank you | I will read this Does your GTK+ app already exist in C/C++? If not, then you can use java-gnome to write your app in Java and use the java libs directly. You also have the option of using jython and java-gnome together to write a non-distributed GTK+ app in python and still use java libs. Some of the interoperability options are rather interesting to consider. -D -- Q: What is the difference betwee open-source and commercial software? A: If you have a problem with commercial software you can call a phone number and they will tell you it might be solved in a future version. For open-source sofware there isn't a phone number to call, but you get the solution within a day. GnuPG key : http://dman.ddts.net/~dman/public_key.gpg
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