Java Utililty Methods UTC Date

List of utility methods to do UTC Date

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Description

The list of methods to do UTC Date are organized into topic(s).

Method

StringgetUtcTimestamp()
get Utc Timestamp 
DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
format.setTimeZone(TimeZone.getTimeZone("GMT"));
return format.format(new Date());
StringgetUtcTimestamp()
Request timestamp in ISO 8601 combined date and time in UTC. 
SimpleDateFormat timeFormatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
timeFormatter.setTimeZone(new SimpleTimeZone(SimpleTimeZone.UTC_TIME, "UTC"));
return timeFormatter.format(new Date());
StringgetUTCTimestamp(Date date)
get UTC Timestamp 
return TS_FORMAT.format(date);
StringgetUtcTimestampAsString(Date date)
Returns an ISO 8601 timestamp for the given date. 
DateFormat dfm = new SimpleDateFormat(DATE_FORMAT);
dfm.setTimeZone(TimeZone.getTimeZone(UTC_TIMEZONE));
return dfm.format(date);
StringgetUTCTimeString4Digits(Date date)
get UTC Time String Digits 
SimpleDateFormat sdf = new SimpleDateFormat("HHmm");
sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
return sdf.format(date);
StringnowInUTC()
Get the current time in UTC 
Date date = new Date();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ");
df.setTimeZone(TimeZone.getTimeZone("GMT"));
return df.format(date);
StringnowUtc(String pattern)
Returns the current system date as string with the specified format 
final SimpleDateFormat dateFormat = new SimpleDateFormat(pattern);
dateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
return dateFormat.format(now());
StringnowUTCString()
now UTC String 
try {
    DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
    return formatter.format(nowUTC());
} catch (Exception e) { 
    return null;
StringSerializeUtc(Date dt)
Serialize Utc 
Calendar c = new GregorianCalendar(UTC, Locale.US);
c.setTime(dt);
StringBuilder b = new StringBuilder(21);
b.append(pad0s(c.get(Calendar.YEAR), 4));
b.append("-");
b.append(pad0s(c.get(Calendar.MONTH) + 1, 2));
b.append("-");
b.append(pad0s(c.get(Calendar.DAY_OF_MONTH), 2));
...
DatestringToUTC(String utc)
Converts a UTC date/time string to a UTC date/time value. 
return ISO_8601_FORMAT.parse(utc);