Problem with Variant

I am new to Jawin. I want to open a Word document, using the method:


public Document Open(Variant[] FileName,Variant[]
ConfirmConversions,Variant[] ReadOnly,Variant[] AddToRecentFiles,Variant[]
PasswordDocument,Variant[] PasswordTemplate,Variant[] Revert,Variant[]
WritePasswordDocument,Variant[] WritePasswordTemplate,Variant[]
Format,Variant[] Encoding,Variant[] Visible,Variant[]
OpenAndRepair,Variant[] DocumentDirection,Variant[] NoEncodingDialog) throws
COMException
    {
      Document res = new Document();
          DispatchPtr dispPtr = (DispatchPtr)invokeN("Open", new Object[]
{FileName, ConfirmConversions, ReadOnly, AddToRecentFiles, PasswordDocument,
PasswordTemplate, Revert, WritePasswordDocument, WritePasswordTemplate,
Format, Encoding, Visible, OpenAndRepair, DocumentDirection, NoEncodingDialog});
          res.stealUnknown(dispPtr);
          return res;

    }

Nevertheless, I don't see how to use this method from my Java test
application. Don't know how to use 'Variant'.

Can anybody help me?

Regards,
Jo Hr.