Java Utililty Methods Unix time

List of utility methods to do Unix time

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Description

The list of methods to do Unix time are organized into topic(s).

Method

DategetUnixEpochDateTime()
Returns the starting Unix Epoch Time. 
Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
calendar.set(1970, 0, 1, 0, 0, 0);
return calendar.getTime();
longgetUnixTime(Date date)
get Unix Time 
Calendar instance = Calendar.getInstance();
instance.setTime(date);
long utc = Date.UTC(instance.get(Calendar.YEAR) - 1900, instance.get(Calendar.MONTH),
        instance.get(Calendar.DAY_OF_MONTH), instance.get(Calendar.HOUR_OF_DAY),
        instance.get(Calendar.MINUTE), instance.get(Calendar.SECOND));
return utc;
intgetUnixTimeByDate(Date date)
get Unix Time By Date 
return (int) (date.getTime() / 1000L);
intunix2afpTime(long ut)
unixafp Time 
int ret = (int) ((ut - timeOffset) / 1000);
return ret;
StringunixDateToString(int date)
Helper for CAST({date} AS VARCHAR(n)). 
final StringBuilder buf = new StringBuilder(10);
unixDateToString(buf, date);
return buf.toString();
intunixTime()
unix Time 
return (int) (System.currentTimeMillis() / 1000);
longunixtime()
Calculates "unix time", ie seconds after 1970 
return System.currentTimeMillis() / 1000L;
longunixTimestamp(int year, int month, int day, int hour, int minute, int second)
unix Timestamp 
final int date = ymdToUnixDate(year, month, day);
return (long) date * MILLIS_PER_DAY + (long) hour * MILLIS_PER_HOUR + (long) minute * MILLIS_PER_MINUTE
        + (long) second * MILLIS_PER_SECOND;
StringunixTimestampToString(long timestamp)
Helper for CAST({timestamp} AS VARCHAR(n)). 
final StringBuilder buf = new StringBuilder(17);
int date = (int) (timestamp / MILLIS_PER_DAY);
int time = (int) (timestamp % MILLIS_PER_DAY);
if (time < 0) {
    --date;
    time += MILLIS_PER_DAY;
unixDateToString(buf, date);
...
DateunixtimeToDate(long time)
Converts a unix time stamp to a Date 
Calendar c = Calendar.getInstance();
c.setTimeInMillis(time * 1000);
return c.getTime();