extern "Java"
{
  class CSimpleJNI;
};
class ::CSimpleJNI : public ::java::lang::Object
{
public:
  virtual jint getValue () { return nValue; }
  virtual void putValue (jint);
  virtual jint transformValue (jint);
  virtual void nativeMethod (jint);
  CSimpleJNI ();
private:
  jint nValue;
public:
  static ::java::lang::Class class$;
};

void CSimpleJNI::nativeMethod(jint param1) {
  jint value = getValue();
  // complex code omitted
  value++;
  putValue(value);
}

Example 2: (a) Using gcjh to create a CNI header file for the previous example yields this C++ code; (b) the code necessary to implement nativeMethod.