Arbitrary number of parameters

Question

I try to call a method defined to accept an arbitrary number of parameters, in particular in the following piece of code:
String catalogPath = "/path/to/catalog";
Constructor constr = resolverClass.getConstructor(
  new Class[] {CatalogManager.class});
Object obj = constr.newInstance(catalogPath);where the method newInstance (see java.lang.reflect.Constructor) is declared as follows:
public T newInstance(Object... initargs)
              throws InstantiationException,
                     IllegalAccessException,
                     IllegalArgumentException,
                     InvocationTargetExceptionHowever, this piece of code is rejected (method not applicable to String). Casting the String into an Object returns the same comment, now for Object. Putting the String into an array and passing that array as a parameter is compiled without any problems but then throws an IllegalArgumentException with the message "type mismatch".
What am I doing wrong here? Or is that in fact a compiling problem? (I'm using Java SE 1.6.0_01).
Dieter

Answer 1

Dear endasil,
many thanks for your helpful comments! In fact, I was slightly confused about my own writing after reading your comment!-)
What I really wanted to do was the following:
CatalogManager mgr = new CatalogManager(path);
CatalogResolver res = new CatalogResolver(mgr);In the meantime, I have found a way to avoid Reflection so the problem has gone for the moment. But I tried to rewrite the snippet above correctly, and - at least - there are no compiling problems any more:
      String catalogPath = "/Dieter/JAVA_Beispiele/XSLT/build";
      CatalogManager cm = new CatalogManager(catalogPath);
      // get a CatalogResolver instance and preset its CatalogManager
      Class resolverClass = loader.loadClass(className);
      Constructor constr = resolverClass.getConstructor(
         new Class[] {CatalogManager.class});
      Object[] args = new Object[] {cm};
      Object obj = constr.newInstance(args);However, I have to explicitly use an array; just putting cm as a single argument instead of args is not accepted by the compiler!
Many thanks for your (eye opening!) help!
profos