class RubberStamp
{
    private RubberStamp()
    {
        //utility class, should not be instantiated.
    }

    /**
     * This will print the documents data.
     *
     * @param args The command line arguments.
     *
     * @throws IOException If there is an error parsing the document.
     */
    public static void main( String[] args ) throws IOException
    {<FILL_FUNCTION_BODY>}

    /**
     * This will print the usage for this document.
     */
    private static void usage()
    {
        System.err.println( "Usage: java " + RubberStamp.class.getName() + " <input-pdf> <output-pdf>" );
    }
}

        if( args.length != 2 )
        {
            usage();
        }
        else
        {
            try (PDDocument document = Loader.loadPDF(new File(args[0])))
            {
                if( document.isEncrypted() )
                {
                    throw new IOException( "Encrypted documents are not supported for this example" );
                }
                for (PDPage page : document.getPages())
                {
                    List<PDAnnotation> annotations = page.getAnnotations();

                    PDAnnotationRubberStamp rs = new PDAnnotationRubberStamp();
                    rs.setName(PDAnnotationRubberStamp.NAME_TOP_SECRET);
                    rs.setRectangle(new PDRectangle(100, 100));
                    rs.setContents("A top secret note");

                    annotations.add(rs);
                }

                document.save( args[1] );
            }
        }
    
<no_super_class>