Java validating time

However I'm having a little bit of trouble with the second regex (the one for the specfic date format).

How else could one go about verifying the string is in the correct format?

“1” – hour is out of range [0-23] Time24Hours is valid : , true Time24Hours is valid : , true Time24Hours is valid : , true Time24Hours is valid : , true Time24Hours is valid : , true Time24Hours is valid : , true Time24Hours is valid : , true Time24Hours is valid : , true Time24Hours is valid : , true Time24Hours is valid : , true Time24Hours is valid : , false Time24Hours is valid : , false Time24Hours is valid : 0:0 , false Time24Hours is valid : 13:1 , false Time24Hours is valid : 1 , false PASSED: Valid Time24Hours Test("") PASSED: Valid Time24Hours Test("") PASSED: Valid Time24Hours Test("") PASSED: Valid Time24Hours Test("") PASSED: Valid Time24Hours Test("") PASSED: Valid Time24Hours Test("") PASSED: Valid Time24Hours Test("") PASSED: Valid Time24Hours Test("") PASSED: Valid Time24Hours Test("") PASSED: Valid Time24Hours Test("") PASSED: In Valid Time24Hours Test("") PASSED: In Valid Time24Hours Test("") PASSED: In Valid Time24Hours Test("0:0") PASSED: In Valid Time24Hours Test("13:1") PASSED: In Valid Time24Hours Test("1") =============================================== com.mkyong.regex.

Unit testing is very important in these situations because they provide good feedback about the correctness of our regular expressions.

( #start of group #1 1[012] # start with 10, 11, 12 | # or [1-9] # start with 1,2,...9 ) #end of group #1 : # follow by a semi colon (:) [0-5][0-9] # follw by 0..5 and 0..9, which means 00 to 59 (\s)? i) # next checking is case insensitive (am|pm) # follow by am or pm 1.

“ bm” – must end with am or pm Time12Hours is valid : am , true Time12Hours is valid : am , true Time12Hours is valid : AM , true Time12Hours is valid : pm , true Time12Hours is valid : pm , true Time12Hours is valid : PM , true Time12Hours is valid : pm , true Time12Hours is valid : am , false Time12Hours is valid : am , false Time12Hours is valid : , false Time12Hours is valid : am , false Time12Hours is valid : pm , false Time12Hours is valid : pm , false Time12Hours is valid : 0 pm , false Time12Hours is valid : am , false Time12Hours is valid : pm , false Time12Hours is valid : bm , false PASSED: Valid Time12Hours Test("am") PASSED: Valid Time12Hours Test(" am") PASSED: Valid Time12Hours Test(" AM") PASSED: Valid Time12Hours Test("pm") PASSED: Valid Time12Hours Test(" pm") PASSED: Valid Time12Hours Test(" PM") PASSED: Valid Time12Hours Test(" pm") PASSED: In Valid Time12Hours Test(" am") PASSED: In Valid Time12Hours Test(" am") PASSED: In Valid Time12Hours Test("") PASSED: In Valid Time12Hours Test(" am") PASSED: In Valid Time12Hours Test(" pm") PASSED: In Valid Time12Hours Test(" pm") PASSED: In Valid Time12Hours Test("0 pm") PASSED: In Valid Time12Hours Test(" am") PASSED: In Valid Time12Hours Test(" pm") PASSED: In Valid Time12Hours Test(" bm") =============================================== com.mkyong.regex.

Additionally you can introduce corresponding null value handler (use case dependent) - throw exception & etc.

If you can do that much, there are lots of people around here that are more than willing to fill in the gaps. Be sure to check out the link for Simple Date Format that I gave above. There are plenty of college students that come around here that want programs written for them without trying to learn it themselves. As you are working on Java, the Java API docs will be an invaluable resource. Unfortunately, you have to have a vague idea where to look before you can find it. I work for Syndicated Office Systems (IS group for Tenet Healthcare) in Anaheim Ca.

Regards, Layne Layne, I've been an AS/400 programmer for over 20 years. Management basically told me to drop everything, learn Java, write and maintain existing code in production. If you don't mind me asking, is your company looking to replace those Java programmers? They're not looking right now - hence my being thrown into the lion's den.

[0-9] # start with 0-9,1-9,00-09,10-19 | # or 2[0-3] # start with 20-23 ) #end of group #1 : # follow by a semi colon (:) [0-5][0-9] # follw by 0..5 and 0..9, which means 00 to 59 1. “13:1” – invalid format for minute, at least 2 digits 5.

“0:0” – invalid format for minute, at least 2 digits 4.

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As I have input 20130925 and my required format is dd/MM/yyyy so, for this case I should get false.

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