Getting yesterday's date through code

Question

I am using the following code to get today's date.

Calendar cal = Calendar.getInstance();
SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
return dateFormat.format(cal.getTime());

But I also want yesteday's date in the same format.

I am using

        Calendar cal = Calendar.getInstance();
    SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");

    cal.add(Calendar.DATE, -1);
    return dateFormat.format(cal.getTime());

but I have a feeling that this will fail once the month or year changes. How do I solve this. Help is very welcome.

Answer 1

I'd do like this:

Date d = new Date(System.currentTimeMillis() - (1000 * 60 * 60 * 24));
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
return sdf.format(d);

Answer 2

How about subtracting a day worth of seconds from the timestamp?