Get two times from the database, and calculate how much time interval

Long Nd = 1000 * 24 * 60 * 60 ;
 Long NH * 60 * 60 = 1000 ;
 Long nm = 60 * 1000 ;
 Long NS = 1000 ;
 for (PhcUserbed phcUserbed: phcUserbedList) {// Get the database list eleven calculated 
     responseDto PhcUserbedResponseDto = new new PhcUserbedResponseDto (); // parameter passing objects defined
      Long TIME1 = (phcUserbed.getEndTime () the getTime () phcUserbed.getStartTime () the getTime ()..); // Get two times from the database and compute their difference 
     String time = (TIME1 / Nd) + "day" + (time1% nd / nh ) + " when" + (time1% nd% nh / nm) + " min" + (time1% nd% nh % nm / ns) + "s" ; 
     responseDto.setUsedata (String.valueOf (Time)); /// assigned 
}

result