It will help to provide a little more detail about what you want to do. Which C functions do you want to call from Java-land? (Or if you're rusty in C, what Java functions would you like to have available from C-land?)

That said, some basics (hopefully basic enough that I don't have to be corrected... =) ):

1. To pass a string to a C function: // C void setString(char* argument);

you can simply use String in the Java function: // Java void setString(String argument);

(For wchar_t*, use WString)

2. To receive a string as a return value, same deal: // C char* getString();

becomes // Java String getString();

(For wchar_t*, use WString)

3. To receive a string as a buffer value: // C void fillStringBuffer(char* buffer, int length);

you need to pass an appropriate buffer: // Java void fillStringBuffer(byte[] buffer, int length); In the caller: // Java int bufferLength = 100; byte[] buffer = new byte[bufferLength]; // C char -> Java byte fillStringBuffer(buffer, bufferLength); String bufferContents = Native.toString(buffer);

(For wchar_t*, use char[])

4. To receive a strin from a pointer to string: // C void fillStringPointer(char** pointerToString); void fillStringPointer(char* &pointerToString); // same thing

you'll pass a pointer by reference // Java void fillStringPointer(PointerByReference pointerToString);

and in the caller: // Java PointerByReference myPointerToString = new PointerByReference(); fillStringPointer(myPointerToString); Pointer stringBuffer = myPointerToString.getValue(); String bufferContents = stringBuffer.getString( /*offset*/ 0);

Landon Williams wrote: