Validate a 4-digit year using a range with regular expressions

Question

I want to do something similar to what was required in this post: Regex Valid Year check

I would like to do something similar but only with years between 2011 & 2099?

Thanks, Mac

The quickest method is `if (year >= 2011 && year <= 2099) { ... }`. — Tom, May 30 '17 at 14:20

score 8 · Accepted Answer · answered May 30 '17 at 14:21

My taste would be for parsing as an integer (Integer.parseInt()) and checking the bounds with <= or similar. But if you insist on the regular expression:

^20(1[1-9]|[2-9][0-9])$

The first case covers 2011–2019, the other 2020–2099. I have not tested.

score 1 · Answer 2 · answered May 30 '17 at 14:24

1

Here is an example

^20((1[1-9])|([2-9][0-9]))$

it matches exactly from 2011 to 2099

answered May 30 '17 at 14:24

Simo

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if you remove the redundant parentheses it is same answer as Ole V.V. – Viktor Mellgren May 30 '17 at 14:25

Nicolas Meier · Answer 3 · 2017-05-30T14:27:04.867

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Try this:

^20[1-9][0-9]$

^20 starts with 20 [1-9] followed by 1,2,3,4,5,6,7,8,9 [0-9] followed by 0,1,2,3,4,5,6,7,8,9

Edit: It will also accept 2010.

See this Answer by Ole V.V.

edited May 30 '17 at 14:27

answered May 30 '17 at 14:14

Nicolas Meier

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Yes, it will. I tested your answer and it works perfect – Nicolas Meier May 30 '17 at 14:24
Thanks for doing that. And for the happy outcome. – Ole V.V. May 30 '17 at 14:25

Validate a 4-digit year using a range with regular expressions

3 Answers3