code: public final String getDisplayName(boolean daylight, int style) {
          return getDisplayName(daylight, style, ULocale.getDefault(Category.DISPLAY));
      }
docs: Returns a name of this time zone suitable for presentation to the user
  in the default <code>DISPLAY</code> locale.
  If the display name is not available for the locale,
  then this method returns a string in the localized GMT offset format
  such as <code>GMT[+-]HH:mm</code>.
  @param daylight if true, return the daylight savings name.
  @param style the output style of the display name.  Valid styles are
  <code>SHORT</code>, <code>LONG</code>, <code>SHORT_GENERIC</code>,
  <code>LONG_GENERIC</code>, <code>SHORT_GMT</code>, <code>LONG_GMT</code>,
  <code>SHORT_COMMONLY_USED</code> or <code>GENERIC_LOCATION</code>.
  @return the human-readable name of this time zone in the default locale.
  @see Category#DISPLAY