Question

So I am trying to subtract 2 dates I have come up with this code :

java.text.DateFormat df = new java.text.SimpleDateFormat("hh:mm:ss_yyyy.MM.dd");
java.util.Date date1 = new java.util.Date();
java.util.Date date2 = df.parse("00:00:00_2013.01.01");
long diff = date2.getTime() - date1.getTime();

But the problem is the diff isn’t correct.

Can anybody tell me what I am doing wrong ?

Answer 1

Your diff sample in the comment is wrong. I tried your code and got this result:

try {
    DateFormat df = new SimpleDateFormat("hh:mm:ss_yyyy.MM.dd");
    Date date1 = new java.util.Date();
    Date date2 = df.parse("00:00:00_2013.01.01");
    long diff = date2.getTime() - date1.getTime();
    Log.e("TEST" , date1.getTime() + " - " + date2.getTime() + " - " + diff);
} catch (ParseException e) {
    Log.e("TEST", "Exception", e);
}

date1: 1350921506492
date2: 1356994800000
diff: 6073293508

diff / 1000 / 60 / 60 / 24 = 70,292748935

And roughly checked 70 days until new year sounds solid.