Java: Difference between two dates spanning over months -

i have following code gets me difference between 2 days (in days, hours, minutes, seconds):

simpledateformat format = new simpledateformat("yyyy-mm-dd hh:mm:ss"); date d1 = format.parse(starttime); date d2 = format.parse(endtime); long diff = d2.gettime() - d1.gettime(); long diffseconds = diff / 1000 % 60; long diffminutes = diff / (60 * 1000) % 60; long diffhours = diff / (60 * 60 * 1000) % 24; long diffdays = diff / (24 * 60 * 60 * 1000); system.out.println("start: " + starttime); system.out.println("end: " + endtime); system.out.println(diffdays + " days, " + diffhours + " hours, " + diffminutes + " minutes, " + diffseconds + " seconds"); 

however, not work when dates cross month, example:

start: 2013-07-31 10:15:01 end: 2013-08-01 11:22:33 -29 days, -22 hours, -52 minutes, -28 seconds  start: 2013-05-31 10:15:01 end: 2013-08-01 11:22:33 -29 days, -22 hours, -52 minutes, -28 seconds 

is possible intelligently span on months , accurate time differences? familiar joda stick standard java apis unless not possible without joda.

you using

simpledateformat format = new simpledateformat("yyyy-mm-dd hh:mm:ss"); 

should be

simpledateformat format = new simpledateformat("yyyy-mm-dd hh:mm:ss"); 

you'll correct result of

start: 2013-05-31 10:15:01 end: 2013-08-01 11:22:33 62 days, 1 hours, 7 minutes, 32 seconds 

here's javadoc date patterns. dd day in month. dd day in year. date objects weren't parsed way expected. day in year value of 31 overwriting month value.

debuggers friend.