Get first and last date of the previous month

Question

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How to get the first date and last date of the previous month? (Java)

In java, how to get the first and last date of the previous month?

If I am not wrong the following code is to get the last date of the previous month.

Calendar aCalendar = Calendar.getInstance();
aCalendar.set(Calendar.DAY_OF_MONTH, -1);    
aCalendar.add(Calendar.DAY_OF_MONTH, -1) ;
System.out.println(new Timestamp(aCalendar.getTime().getTime()));

Correct me if I am wrong.

Thank you.

Solution 1

Use getActualMaximum()

Calendar aCalendar = Calendar.getInstance();
// add -1 month to current month
aCalendar.add(Calendar.MONTH, -1);
// set DATE to 1, so first date of previous month
aCalendar.set(Calendar.DATE, 1);

Date firstDateOfPreviousMonth = aCalendar.getTime();

// set actual maximum date of previous month
aCalendar.set(Calendar.DATE,     aCalendar.getActualMaximum(Calendar.DAY_OF_MONTH));
//read it
Date lastDateOfPreviousMonth = aCalendar.getTime();

Solution 2

Calendar aCalendar = Calendar.getInstance();
aCalendar.set(Calendar.DATE, 1);
aCalendar.add(Calendar.DAY_OF_MONTH, -1);
Date lastDateOfPreviousMonth = aCalendar.getTime();
aCalendar.set(Calendar.DATE, 1);
Date firstDateOfPreviousMonth = aCalendar.getTime();