Get first and last day of month using threeten, LocalDate
The API was designed to support a solution that matches closely to business requirements
import static java.time.temporal.TemporalAdjusters.*;LocalDate initial = LocalDate.of(2014, 2, 13);LocalDate start = initial.with(firstDayOfMonth());LocalDate end = initial.with(lastDayOfMonth());However, Jon's solutions are also fine.
YearMonth
For completeness, and more elegant in my opinion, see this use of YearMonth class.
YearMonth month = YearMonth.from(date);LocalDate start = month.atDay(1);LocalDate end = month.atEndOfMonth();For the first & last day of the current month, this becomes:
LocalDate start = YearMonth.now().atDay(1);LocalDate end = YearMonth.now().atEndOfMonth();