Returns the element transparency mode.
The default value depends on the type of the report element. Graphic elements like rectangles and lines are
opaque by default, but the images are transparent. Both static texts and text fields are transparent
by default, and so are the subreport elements.
MODE_OPAQUE or MODE_TRANSPARENT
Gets the pattern used for this text field. The pattern will be used in a SimpleDateFormat for dates
and a DecimalFormat for numeric text fields. The pattern format must follow one of these two classes
formatting rules, as specified in the JDK API docs.
a string containing the pattern.