How to get start and end date of a year?

Question

I have to use the Java Date class for this problem (it interfaces with something out of my control).

How do I get the start and end date of a year and then

Answer 1

val instance = Calendar.getInstance()
                instance.add(Calendar.YEAR,-1)

 val prevYear = SimpleDateFormat("yyyy").format(DateTime(instance.timeInMillis).toDate())

val firstDayPreviousYear = DateTime(prevYear.toInt(), 1, 1, 0, 0, 0, 0)

val lastDayPreviousYear = DateTime(prevYear.toInt(), 12, 31, 0, 0, 0, 0)