[LANG-222] [lang] Add convenience format(long) methods to FastDateFormat

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0
• Fix Version/s: 2.1

Environment

Operating System: other
Platform: All

• Bugzilla Id: 29794
• Assignee: Unassigned
• Reporter: Jed Wesley-Smith
• Created: 25/Jun/04 09:37
• Updated: 16/May/06 12:23
• Resolved: 16/May/06 12:23

Description

it is sometimes necessary to format based on a long timeInMillis [for instance
either directly from System.currentTimeInMillis or from a File.lastModified()].

I have an extension of FastDateFormat that adds the following methods to
support this:

/**

• <p>Formats a <code>long</code> timeInMillis. Useful if you don't
  want
• to create a Date or don't have a Calendar intance</p>
• @param date the new time in UTC milliseconds from the epoch
  (1/1/1970).
• @return the formatted string
  */
  public String format(long timeInMillis) { return format(timeInMillis, new StringBuffer (mMaxLengthEstimate)).toString(); }

/**

• <p>Formats a <code>long</code> timeInMillis. Useful if you don't
  want
• to create a Date or don't have a Calendar intance</p>
• @param date the new time in UTC milliseconds from the epoch
  (1/1/1970).
• @return the formatted string
  */
  public StringBuffer format(long timeInMillis, StringBuffer buf) {
  class UtilGregorianCalendar extends GregorianCalendar {
  UtilGregorianCalendar(TimeZone timeZone) { super(timeZone); }

public void setTimeInMillis(long timeInMillis)

{ super.setTimeInMillis(timeInMillis); }

}

UtilGregorianCalendar c = new UtilGregorianCalendar(mTimeZone);
c.setTimeInMillis(timeInMillis);
return applyRules(c, buf);
}

and a minor change to format(Object, StringBuffer, FieldPosition:

else if (obj instanceof Long)

{ return format(((Long) obj).longValue(), toAppendTo); }