Whats wrong in this java regex

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Can anybody please tell me whats wrong in the regex for java the matcher.find is not matching it. My string to match is this ----- DATEADD('2016-09-18T00:00:00','year','1' )

The regex I am using is

1)^[DATEADD]\$[\\'][\\w-:]+[\\'][\\,][\\'][a-zA-Z_][\\'][\\,][\\'][\\d]+[[\\']][\$]$
2)^[DATEADD][\$][\\s]*[.][a-zA-Z0-9_.]+[...][a-zA-Z_][...][\\d]+[[\\']][\\s]*[\$]$"

What I have tried:

I have tried a lot of regex but none of them are matching

Posted 8-Sep-16 23:42pm

Member 12729590

Updated 9-Sep-16 3:07am

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OriginalGriff · Answer 1 · 2016-09-08T23:47:00

OK...the first thing to note is that '[' and ']' delimit a collection of characters that can be in a single location. For example "[0123456789]" or "[0-9]" will each match a single digit.
So "[DATEADD]" will match a single character that is an 'A', 'D', 'E', or 'T' - and not a sequence of characters.
To match the sequence "DATEADD" just type the characters without the square brackets.
Have a look here: Pattern (Java Platform SE 7 )[^] - it may help.
And get a copy of Expresso[^] - it's free, and it examines and generates Regular expressions.

Patrice T · Answer 2 · 2016-09-09T03:07:00

Here is a link to RegEx documentation:
perlre - perldoc.perl.org[^]
Here is links to tools to help build RegEx and debug them:
.NET Regex Tester - Regex Storm[^]
Expresso Regular Expression Tool[^]
This one show you the RegEx as a nice graph which is really helpful to understand what is doing a RegEx:
Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]

Advice: Use last link and build the RegEx from scratch, your actual RegEx is a mess.

Whats wrong in this java regex

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