code: public static JButton createCalendarButton(String strDateParam, Date dateTarget)
      {
          JTimeButton button = new JTimeButton(strDateParam, dateTarget);
  //        button.setMargin(NO_INSETS);
          button.setOpaque(false);
  
          return button;
      }
docs: Create this calendar in a popup menu and synchronize the text field on change.
  @param strDateParam The name of the date property (defaults to "date").
  @param dateTarget The initial date for this button.