Constructor Detail

• DateHelper

  public DateHelper()

Method Detail

• subDaysFromDate

  public static void subDaysFromDate​(java.util.Calendar cal,
                                     int days)

  Subtracts 'days' from a calendar taking into consideration the month, year and leap years change as well.

  Parameters:

  cal - The Calendar.

  days - The number of days.

• addDaysToDate

  public static void addDaysToDate​(java.util.Calendar cal,
                                   int days)

  Adds 'days' to a calendar taking into consideration the month, year and leap years change as well.

  Parameters:

  cal - The Calendar.

  days - The number of days.

• isLeapYear

  public static boolean isLeapYear​(int year)

  Leap years occur in years exactly divisible by four, except those years ending in 00 are leap years only if they are divisible by 400.

  Parameters:

  year - The year number.

  Returns:

  true if it is a leap year.

• parseDate

  public static java.util.Date parseDate​(java.lang.String myDate,
                                         java.lang.String pattern)
                                  throws java.text.ParseException

  Parses a string into a date. String should be in SimpleDateFormat format. e.g. java.util.Date d = parseDate(myDate, "dd/MM/yyyy");

  Parameters:

  myDate - The date string.

  pattern - The pattern to use.

  Returns:

  The Date.

  Throws:

  java.text.ParseException

• dateToString

  public static java.lang.String dateToString​(java.util.Date uDate,
                                              java.lang.String pattern)

  Converts a date to a string based on a SimpleDateFormat pattern. e.g. String s = dateToString(uDate, "dd/MM/yyyy");

  Parameters:

  uDate - The date string.

  pattern - The pattern to use.

  Returns:

  The string of the date or null on error.

• isDateValid

  public static boolean isDateValid​(java.lang.String dateToCheck,
                                    java.lang.String pattern)

  Checks a string to see if it contains a valid date in SimpleDateFormat.

  Parameters:

  dateToCheck - The date string to check.

  pattern - The pattern to use.

  Returns:

  true if it contains a valid date in SimpleDateFormat.

• getYearForDate

  public static int getYearForDate​(java.lang.String dateToCheck,
                                   java.lang.String pattern)

  Parses a string into a date. String should be in SimpleDateFormat format. Returns only the year of the date or -1 on error.

  NOTE: only 'yyyy' is supported!

  Parameters:

  dateToCheck - The date string to check.

  pattern - the The pattern to use.

  Returns:

  The date or -1 on error.

• getMonthForDate

  public static int getMonthForDate​(java.lang.String dateToCheck,
                                    java.lang.String pattern)

  Parses a string into a date. String should be in SimpleDateFormat format. Returns only the month of the date or -1 on error.

  NOTE: only 'MM' is supported!

  Parameters:

  dateToCheck - The date string to check.

  pattern - The pattern to use.

  Returns:

  The date or -1 on error.

• getDayForDate

  public static int getDayForDate​(java.lang.String dateToCheck,
                                  java.lang.String pattern)

  Parses a string into a date. String should be in SimpleDateFormat format. Returns only the day of the date or -1 on error.

  NOTE: only 'dd' is supported!

  Parameters:

  dateToCheck - The date string to check.

  pattern - The pattern to use.

  Returns:

  The day for the date or -1 on error.

• getDayNameForDate

  public static java.lang.String getDayNameForDate​(java.util.Date dt,
                                                   boolean fullname)

  Gets the name of a day based on a date and current locale.

  Parameters:

  dt - The date.

  fullname - Fetch complete day's name or the short one.

  Returns:

  A string with the name of the day.