Java - how to select previous day from the calendar? or how to get previous date in JAVA?

Question

I want to select the previous day in a calendar. For example, if I have 02-28-2018 I need to set 27 automatically.

I have tried the below code but it fails when the date is 1st.

String currentDate = new SimpleDateFormat("dd").format(new Date());
int previousDay = Integer.parseInt(currentDate) - 1;

Answer 1

There is an easy way to do this in Java 8

int previousDay = LocalDate.now().minusDays(1).getDayOfMonth();

For LocalDate Reference see here

Hope this Helps!

Answer 2

If using Java7 you can use Calendar

Calendar cal = Calendar.getInstance();
cal.add(Calendar.DAY_OF_YEAR, -1);

System.out.println(new SimpleDateFormat("dd").format(cal.getTime()));

But for Java8 see http://www.oracle.com/technetwork/articles/java/jf14-date-time-2125367.html

Also a back-port for Java 6 & Java 7: ThreeTen-Backport.