date - Java Time period in decimal number of years

Question

If I calculate the difference between 2 LocalDate's in java.time using:

Period p = Period.between(testDate, today);

Then I get an output with the number of years, months, days like:

Days = 9
Months = 6
Years = 18

Does anyone know a clean way to represent that as a decimal type value (ie, above would be something around 18.5...)?

Answer 1

You mentioned in one of your comments that you need quarter year precision if you need the current quarter you can use IsoFields.QUARTER_YEARS:

double yearAndQuarter = testDate.until(today, IsoFields.QUARTER_YEARS) / 4.0;

This way you will actually use the time api, always get the correct result and @Mike won't have to loathe anything.