last day of month calculation last day of month calculation java java

last day of month calculation


java datetime calendar 

Calendar.getInstance().getActualMaximum(Calendar.DAY_OF_MONTH);

This returns actual maximum for current month. For example it is February of leap year now, so it returns 29 as int.

java datetime calendar

java.time.temporal.TemporalAdjusters.lastDayOfMonth()

Using the java.time library built into Java 8, you can use the TemporalAdjuster interface. We find an implementation ready for use in the TemporalAdjusters utility class: lastDayOfMonth.

import java.time.LocalDate;import java.time.temporal.TemporalAdjusters;LocalDate now = LocalDate.now(); //2015-11-23LocalDate lastDay = now.with(TemporalAdjusters.lastDayOfMonth()); //2015-11-30

If you need to add time information, you may use any available LocalDate to LocalDateTime conversion like

lastDay.atStartOfDay(); //2015-11-30T00:00

java datetime calendar

And to get last day as Date object:

Calendar cal = Calendar.getInstance();cal.set(Calendar.DATE, cal.getActualMaximum(Calendar.DATE));Date lastDayOfMonth = cal.getTime();

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