Java Date and Time conversion class SimpleDateFormat

and Time Pattern

Date	Result
"YYYY. Mm.dd G ' at ' HH:mm:ss z '	2001.07.04 AD at 12:08:56 PDT
"EEE, MMM D, ' yy"	Wed, Jul 4, ' 01
"H:mm a"	12:08 PM
"HH ' o ' clock ' A, zzzz"	O ' clock PM, Pacific Daylight Time
"K:mm A, z"	0:08 PM, PDT
"Yyyyy. MMMMM.DD GGG hh:mm AAA "	02001.july.04 AD 12:08 PM
"EEE, D MMM yyyy HH:mm:ss Z"	Wed, 4 Jul 2001 12:08:56-0700
"Yymmddhhmmssz"	010704120856-0700
"Yyyy-mm-dd ' T ' HH:mm:ss. Sssz "	2001-07-04t12:08:56.235-0700
"Yyyy-mm-dd ' T ' HH:mm:ss. Sssxxx "	2001-07-04t12:08:56.235-07:00
"Yyyy-' W ' Ww-u"	2001-w27-3

private static locale en_sg=new locale ("en", "SG");
public static final SimpleDateFormat sdf1 = new SimpleDateFormat ("Yyyy-mm-dd",
EN_SG);
public static final SimpleDateFormat sdf2 = new SimpleDateFormat ("dd MMM yyyy",
EN_SG);
public static final SimpleDateFormat sdf3 = new SimpleDateFormat ("Dd/mm/yyyy hh:mm",
EN_SG);
public static final SimpleDateFormat sdf4 = new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss. SSS ",
EN_SG);
public static final SimpleDateFormat sdf5 = new SimpleDateFormat ("EEE, dd MMM yyyy",
EN_SG);
public static final SimpleDateFormat Sdf6 = new SimpleDateFormat ("hh:mm AA",
EN_SG);
public static final SimpleDateFormat sdf7 = new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss",
EN_SG);
public static final SimpleDateFormat Sdf8 = new SimpleDateFormat ("Eeeeeeeee, hh:mm AA",
EN_SG);
public static final SimpleDateFormat sdf9 = new SimpleDateFormat ("HH",
EN_SG);
public static final SimpleDateFormat SDF10 = new SimpleDateFormat ("hh:mm",
EN_SG);
public static final SimpleDateFormat sdf11= new SimpleDateFormat ("YyyyMMdd",
EN_SG);
public static final SimpleDateFormat sdf12 = new SimpleDateFormat ("AA", EN_SG);

public static final SimpleDateFormat sdf13 = new SimpleDateFormat ("hh:mm", EN_SG);
public static final SimpleDateFormat sdf14 = new SimpleDateFormat ("EE d MMM yyyy",
EN_SG);
public static final SimpleDateFormat Sdf15 = new SimpleDateFormat ("Yyyy-mm-dd hh:mm aaa",
EN_SG);

For UTC time transfer to SG local time use:
public static final SimpleDateFormat SDF4_UTC = new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss. SSS ",
Locale.english);
public static final SimpleDateFormat SDF7_UTC = new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss",
Locale.english);
public static final SimpleDateFormat SDF13_UTC = new SimpleDateFormat ("hh:mm",
Locale.english);
public static int time_offset=0;
static{
Sdf4_utc.settimezone (Timezone.gettimezone ("Europe/london"));
Sdf7_utc.settimezone (Timezone.gettimezone ("Europe/london"));
Sdf13_utc.settimezone (Timezone.gettimezone ("Europe/london"));
TimeZone GMT = Timezone.gettimezone ("Europe/london");
Calendar gmtcal = Calendar.getinstance (GMT);
Time_offset = Gmtcal.get (Calendar.dst_offset);
LOG.D ("Gyy", "Time_offset" +time_offset);
}

String Datedisplay=constants.sdf5.format (Constants.sdf4.parse (medals.get (position). Getmedalupdatetime ()));

Java Date and Time conversion class SimpleDateFormat