The between() method of ChronoPeriod interface in Java is used to obtain a chronoPeriod consisting of the number of years, months, and days between two given dates (including start date and excluding end date).
This chronoPeriod is obtained as follows:
- Remove complete months.
- Now, calculate the remaining number of days.
- Then, adjust to ensure that both have the same sign.
- Now, split the number of months into years and months based on a 12 month year.
- Consider a month, if the end day-of-month is greater than or equal to the start day-of-month (Eg.: from 2017-05-12 to 2018-07-18 is one year, two months and six days).
Note: ChronoPeriod obtained from above formula can be a negative, if the end is before the start. The negative sign will be the same in each of year, month and day.
Syntax:
static ChronoPeriod between(ChronoLocalDate startDateInclusive,
ChronoLocalDate endDateExclusive)
Parameters:
- startDateInclusive – The start date is inclusive and must not be null.
- endDateExclusive – The end date is exclusive and must not be null.
Return Value: The between() function of chronoPeriod returns the chronoPeriod between the given start and end date.
Below is the implementation of the above function:
// Java code to show the chronoPeriod// between the given start and end date  import java.time.*;import java.time.chrono.*;  public class ChronoPeriodClass {      // Function to calculate chronoPeriod between    // start and end date    static void    calculateChronoPeriod(ChronoLocalDate startDate,                          ChronoLocalDate endDate)    {        ChronoPeriod chronoPeriod            = ChronoPeriod.between(startDate, endDate);        System.out.println("ChronoPeriod between start and end "                           + "date is : " + chronoPeriod);    }      // Driver Code    public static void main(String[] args)    {        // Start date        ChronoLocalDate startDate            = LocalDate.parse("2017-02-13");          // End date        ChronoLocalDate endDate            = LocalDate.parse("2018-08-20");          calculateChronoPeriod(startDate, endDate);    }} |
Output:
ChronoPeriod between start and end date is : P1Y6M7D
