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Old June 10th, 2003, 07:27 AM
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hi,

I am using SimpleDateFormat to try and validate a date.
I am using the format MM/yy i.e. 05/02 the following:

            try {
                SimpleDateFormat sdf = new SimpleDateFormat("MM/yy");
                System.out.println(expiry_date);
                sdf.parse(expiry_date);
            } catch (Exception e) {
                System.err.println("Date Format error");
            }

 validates the presence of "/" in the date but doesn't validate the date ranges! How can i get SimpleDateFormat to validate the date ranges in this format. If I can't use this class do I have another option?

Thanks.

Matt
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Old June 27th, 2003, 05:43 AM
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actually you can do it quite easily. java.text.DateFormat.parse(String source) will throw a java.text.ParseException if the string cannot be parsed into a valid java.util.Date Object (DateFormat is an ancestor of SimpleDateFormat).
Therefore, the Exception you're catching can have 2 meanings:
1) the string is not a valid date
2) the string is not a date at all
You'd have to add some more logic to determine which of the two is the case (like trying to create integers from the parts of the string that should contain numbers, if that fails you're into case 2).


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