You can use JNI (the Java Native Interface) to accomplish this.
a) your C/C++ functions have to be packaged in a shared library (which
you'd already anticipated)
b) the entry point for your C/C++ code has to use a Java
package-and-class-specific "mangled" name -- e.g., if your Java wrapper
class is "Wrapper" and that class is in package "Enclosure", you might have
a Java class such as:
package Enclosure;
public class Wrapper {
public Wrapper() {
// ...
}
// (only) declare in Java; implement in C/C++ code
public native String[] getKernelStuff();
}
which would result in a C function name for getKernelStuff() that includes
both the package and class names:
#include <jni.h>
JNIEXPORT jobjectArray JNICALL Java_Enclosure_Wrapper_getKernelStuff
(JNIEnv *env, jobject theObj) {
// ...
}
You can pass Java data types to your C code, and xfer/convert Java/C data
types in both directions.
Build your C/C++ code as a shared library, then load that library via Java
using the System.loadLibrary("shortLibName") function, as in:
public class TestTheWrapper {
public static void main(String[] argv) {
// this actually loads libWrap.so
// (name is platform neutral -- pre/suffixes
// are added implicitly
System.loadLibrary("Wrap");
Enclosure.Wrapper w = new Enclosure.Wrapper();
w.getKernelStuff();
}
}
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