Thread: problem with time manipulation!

i need to add certain minutes to util.time variable, and to do that code implemented is

 public java.sql.Time getSQLTime(String time,int min) throws ParseException{
        DateFormat sdf = new SimpleDateFormat("hh:mm");
        Date date = sdf.parse(time);
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(Calendar.MINUTE, (min+30));
//System.out.println(" Minutes to be added:"+min);
 
        date = utilDateToSqlTime(calendar.getTime());
//System.out.println("updated sql time"+date);
        return new java.sql.Time(date.getTime());
    }

i parameter time is in (hh:mm) format and is converted into util.time object with help of parse method.
this above method returns sql.time. this code works fine except when the is set to [12:min] say time= 12:30 and i have to add 150 minutes to it then expected outcome should be 15:00:00 but the actual out come is 03:00:00.
note: when 11:30 is passed and minutes to add 150, then outcome is 14:00:00.

this problem persist. check the output for the range 11:58 to 13:00 and minutes to be added is 150

 
time passed:11:58	returned time	14:28:00
time passed:11:59	returned time	14:29:00
time passed:12:00	returned time	02:30:00
time passed:12:01	returned time	02:31:00
time passed:12:02	returned time	02:32:00
time passed:12:03	returned time	02:33:00
time passed:12:04	returned time	02:34:00
time passed:12:05	returned time	02:35:00
time passed:12:06	returned time	02:36:00
time passed:12:07	returned time	02:37:00
time passed:12:08	returned time	02:38:00
time passed:12:09	returned time	02:39:00
time passed:12:10	returned time	02:40:00
time passed:12:11	returned time	02:41:00
time passed:12:12	returned time	02:42:00
time passed:12:13	returned time	02:43:00
time passed:12:14	returned time	02:44:00
time passed:12:15	returned time	02:45:00
time passed:12:16	returned time	02:46:00
time passed:12:17	returned time	02:47:00
time passed:12:18	returned time	02:48:00
time passed:12:19	returned time	02:49:00
time passed:12:20	returned time	02:50:00
time passed:12:21	returned time	02:51:00
time passed:12:22	returned time	02:52:00
time passed:12:23	returned time	02:53:00
time passed:12:24	returned time	02:54:00
time passed:12:25	returned time	02:55:00
time passed:12:26	returned time	02:56:00
time passed:12:27	returned time	02:57:00
time passed:12:28	returned time	02:58:00
time passed:12:29	returned time	02:59:00
time passed:12:30	returned time	03:00:00
time passed:12:31	returned time	03:01:00
time passed:12:32	returned time	03:02:00
time passed:12:33	returned time	03:03:00
time passed:12:34	returned time	03:04:00
time passed:12:35	returned time	03:05:00
time passed:12:36	returned time	03:06:00
time passed:12:37	returned time	03:07:00
time passed:12:38	returned time	03:08:00
time passed:12:39	returned time	03:09:00
time passed:12:40	returned time	03:10:00
time passed:12:41	returned time	03:11:00
time passed:12:42	returned time	03:12:00
time passed:12:43	returned time	03:13:00
time passed:12:44	returned time	03:14:00
time passed:12:45	returned time	03:15:00
time passed:12:46	returned time	03:16:00
time passed:12:47	returned time	03:17:00
time passed:12:48	returned time	03:18:00
time passed:12:49	returned time	03:19:00
time passed:12:50	returned time	03:20:00
time passed:12:51	returned time	03:21:00
time passed:12:52	returned time	03:22:00
time passed:12:53	returned time	03:23:00
time passed:12:54	returned time	03:24:00
time passed:12:55	returned time	03:25:00
time passed:12:56	returned time	03:26:00
time passed:12:57	returned time	03:27:00
time passed:12:58	returned time	03:28:00
time passed:12:59	returned time	03:29:00
time passed:13:00	returned time	15:30:00

thank you!

Originally Posted by KevinWorkman

I recommend you create an SSCCE that we can play with- how are you calling this function? How are you printing out those times?

i'm not going to print these times, these are genrated so that every one who view my post come know about the problem.
well, you are right i should make it small.
i want to store start and end time of the show(movie), both of these times values are provided by the user (site admin) in order to create an Object of "show", and then use this object as a parameter to another method(insert_show()) of class showDAO to create a record in database.
every thing is working fine except the above error.
String start is decided according to show time selected, like if show is morning then show_start time will be 09:30 to duration of the movie +other mantaince timings like cleaning, interval etc.
this problem arises when show =afternoon, and show_start=12:30 ( between noon to 1PM).
any way code to produce those timing is

public class show {
 
    private Time start;
    private Time end;
    private int dur;
    private Date moviedate;
    private String show;
    private String moviename;
    private String theater;
 
    public show() {
    }
 
    ;
    public show(Time s, Time e, String moviename, int dur, Date movie, String show, String theater) {
        this.start = s;
        this.end = e;
        this.dur = dur;
        this.moviedate = movie;
        this.show = show;
        this.moviename = moviename;
        this.theater = theater;
    }
 public java.sql.Time getSQLTime(String time, int min) throws ParseException {
        DateFormat sdf = new SimpleDateFormat("hh:mm");
        Date date = sdf.parse(time);
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(Calendar.MINUTE, (min + 30));
//System.out.println(" Minutes to be added:"+min);
 
        date = utilDateToSqlTime(calendar.getTime());
//System.out.println("updated sql time"+date);
        return new java.sql.Time(date.getTime());
    }
 public static void main(String[] arg) throws ParseException {
        show sh = new show();
         String[] time={"11:58","11:59","12:00","12:01","12:02","12:03","12:04","12:05","12:06","12:07","12:08","12:09","12:10","12:11","12:12","12:13","12:14","12:15","12:16","12:17","12:18","12:19","12:20","12:21","12:22","12:23","12:24","12:25","12:26","12:27","12:28","12:29","12:30","12:31","12:32","12:33","12:34","12:35","12:36","12:37","12:38","12:39","12:40","12:41","12:42","12:43","12:44","12:45","12:46","12:47","12:48","12:49","12:50","12:51","12:52","12:53","12:54","12:55","12:56","12:57","12:58","12:59","13:00"};
            for (String s: time){
           //mm=Integer.toString(i);
         //  System.out.print("minutes"+mm);
 
         Time t = sh.getSQLTime(s, 120);
 
            System.out.println("time passed:"+s+"\treturned time\t" + t);
        }
    }
}

Have you got the case of the 'h' right in your SimpleDateFormat?

Originally Posted by Sean4u

Have you got the case of the 'h' right in your SimpleDateFormat?

yeah that h should be H, and issue is resolved. i'm a noob.
thank you guys!