Java Utililty Methods Year From

String getYear(boolean fourDigit)
Returns the current Year as a string (e.g.

if (mCalendar == null)
 Init();
String year = mCalendar.get(Calendar.YEAR) + "";
if (year.length() == 4 && fourDigit)
 return year;
return year.substring(2);

String getYear(int num)
get Year

Calendar calendar = new GregorianCalendar();
int year = calendar.get(Calendar.YEAR) + num;
int month = calendar.get(Calendar.MONTH);
String yearstr = "";
if (month < 8) {
 yearstr = String.valueOf(-1) + "/" + String.valueOf(year);
} else {
 yearstr = String.valueOf(year) + "/" + String.valueOf(year + 1);
...

int getYear(long t)
get Year

Calendar cld = Calendar.getInstance();
if (t > 0) {
 cld.setTime(new java.util.Date(t));
return cld.get(Calendar.YEAR);

Date getYearBegin(int year)
get Year Begin

Calendar ca = Calendar.getInstance();
truncate(ca);
ca.set(DAY_OF_MONTH, 1);
ca.set(MONTH, 0);
ca.set(YEAR, year);
return ca.getTime();

Date getYearFirst(int year)
get Year First

Calendar calendar = Calendar.getInstance();
calendar.clear();
calendar.set(Calendar.YEAR, year);
Date currYearFirst = calendar.getTime();
return currYearFirst;

String getYearFormat(String dateString)
get Year Format

int start = 0;
int to = dateString.indexOf(".");
return dateString.substring(start, to);

int getYearFromDay(int days)
Converts the number of elapsed days from 0001年01月01日 (YYYY/MM/DD) to the corresponding year.

int cycles = days / DAYS_LEAP_CYCLE;
int cycleRest = days % DAYS_LEAP_CYCLE;
int centInCycle = cycleRest / DAYS_CENTURY;
int centRest = cycleRest % DAYS_CENTURY;
centRest += DAYS_CENTURY * (centInCycle / (YEARS_LEAP_CYCLE / YEARS_CENTURY));
centInCycle -= (centInCycle / (YEARS_LEAP_CYCLE / YEARS_CENTURY));
int leapInCent = centRest / DAYS_LEAP;
int leapRest = centRest % DAYS_LEAP;
...

Integer getYearFromISODate(String isoDate)
Method to return the year part from an iso date in either yyyy, yyyy-mm, or yyyy-mm-dd

Integer year = null;
if (isoDate.matches("\\d{4}")) { 
 year = new Integer(isoDate);
} else if (isoDate.matches("\\d{4}-\\d{2}") || isoDate.matches("\\d{4}-\\d{2}-\\d{2}")) {
 String[] sa = isoDate.split("-");
 year = new Integer(sa[0]);
} else if (isoDate.matches("\\d{8}")) { 
 String stringYear = isoDate.substring(0, 4);
...

int getYearFromTimestamp(long ms)
get Year From Timestamp

if (ms < 0)
 throw new NumberFormatException("argument must be positive");
Calendar cal = Calendar.getInstance(TIMEZONE, LOCALE);
cal.setTimeInMillis(ms);
return cal.get(Calendar.YEAR);

int getYearFromWeekCode(String weekCode)
get Year From Week Code

return Integer.parseInt(weekCode.substring(0, 4));