Java Calendar calculation time difference and calendar time difference

Java Calendar calculation time difference and calendar time difference

1. Public static void main (String [] args ){
2. Calendar c = Calendar. getInstance ();
3. Int y = 2016; // year
4. Int M = 1; // month
5. Int d = 1; // day
6. Int H = 0; // hour
7. Int m = 0; // minute
8. Int s = 0; // second
9. C. set (Calendar. YEAR, y );
10. C. set (Calendar. MONTH, M-1 );
11. C. set (Calendar. DATE, d );
12. C. set (Calendar. HOUR_OF_DAY, H );
13. C. set (Calendar. MINUTE, m );
14. C. set (Calendar. SECOND, s );
15. Calendar now = Calendar. getInstance ();
16. Long aTime = now. getTimeInMillis ();
17. Long bTime = c. getTimeInMillis ();
18. Long cTime = aTime-bTime;
19. Long sTime = cTime/1000; // time difference, in seconds
20. Long mTime = sTime/60;
21. Long hTime = mTime/60;
22. Long dTime = hTime/24;
23. SimpleDateFormat f = new SimpleDateFormat ("yyyy-MM-dd HH: mm: ss ");
24. System. out. println ("current time:" + f. format (now. getTime ()));
25. System. out. println ("set time:" + f. format (c. getTime ()));
26. System. out. println ("Time Difference:" + dTime + "day" + hTime % 24 + "Hour" + mTime % 60 + "Minute" + sTime % 60 + "second ");
27. }