Localize and format the message string from a log record.

  Localize and format the message string from a log record. This method is provided as a convenience for Formatter subclasses to use when they are performing formatting.

The message string is first localized to a format string using the record's ResourceBundle. (If there is no ResourceBundle, or if the message key is not found, then the key is used as the format string.) The format String uses java.text style formatting.

• If there are no parameters, no formatter is used.
• Otherwise, if the string contains "{0" then java.text.MessageFormat is used to format the string.
• Otherwise no formatting is performed.

Returns: a localized and formatted message
Parameters:
- record - the log record containing the raw message

  Return the header string for a set of formatted records.

  Return the header string for a set of formatted records.

This base class returns an empty string, but this may be overriden by subclasses.
Returns: header string
Parameters:
- h - The target handler (can be null)

  Return the tail string for a set of formatted records.

  Return the tail string for a set of formatted records.

This base class returns an empty string, but this may be overriden by subclasses.
Returns: tail string
Parameters:
- h - The target handler (can be null)