validate time

Posted on 2004-10-07
Last Modified: 2008-02-01
how can i validate a time? say if i have 10:00 (hh:mm) the time is valid, if it is 25:10, it should be invalid.
Should be easier but its urgent.
Question by:ldbkutty
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LVL 37

Expert Comment

ID: 12246930
LVL 37

Accepted Solution

zzynx earned 250 total points
ID: 12246953
       SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
        String s = "25:10";
        Date d = null;
        try {
            d = sdf.parse(s);
        } catch (ParseException ex) {
            System.out.println("Invalid Date");

Expert Comment

ID: 12246959
Yeah parse it throught the date format classes and see if it throws an exception. If it throws an exception you know that there is a problem. Also if you do that you can even specify stuff like 12 hour times in stead of 24 hour and stuff like that.
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LVL 32

Author Comment

ID: 12246963
I thought there might be SimpleTimeFormat!!!! he...hee..thats Ok. HH:mm & hh:mm - whats the difference.
LVL 37

Expert Comment

ID: 12246978

H : Hour in day (0-23)
h : Hour in am/pm (1-12)

Expert Comment

ID: 12246998
There is also a flag for 1-24 and 0-23 where the latter is the standard depending on your locale settings

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