Java multiple Regex Validation

Question

I'm new to java and I'm trying to validate user input using a regex.

I need to validate two patterns :

below is my pattern but somehow it is not working..

String versionRegex  = "^version-1.[1-9][1-9]|version";

Thanks for your help guys.

You need to escape the . as \.. Everything else seems correct — Kon
– Kon, Commented Jun 14, 2016 at 6:08
How do you know that "it's not working" ? What input are you giving, what is the outcome, and what did you expect the outcome to be? — Erwin Bolwidt
– Erwin Bolwidt, Commented Jun 14, 2016 at 6:12

Jay · Accepted Answer · 2016-06-20 03:44:53Z

2

This will support version / version-1.xy / VERSION / VERSION-1.xy

String versionRegex  = "(?i)^version(-1\\.[1-9][1-9])?";

answered Jun 20, 2016 at 3:44

Jay

7571 gold badge12 silver badges38 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Krzysztof Krasoń · Accepted Answer · 2016-06-20 04:34:15Z

1

String versionRegex  = "(?i)^version(-1\\.[1-9][1-9])?";

. needs to be escaped in java with \\, and (?i) to support case insensitive matching.

answered Jun 14, 2016 at 6:07

Krzysztof Krasoń

27.7k17 gold badges96 silver badges119 bronze badges

I'd suggest ^version(-1\\.[1-9][1-9])?

thanks!, in case I wanna support capital letters ? what should I add.. eg. VERSION-1.xy or VERSION

@jawmar You need add (?i) in front of the regexp and it will becoem case insensitive