Create regex pattern for below string

Question

Can anyone please suggest me how we can create pattern for below string.

String stringToFind = "Abcdef_ghi_2.0-123_20150424_1642_text.tar.gz";

I have tried with given pattern, but no use. Felt that some where its not satisfying with pattern.

String pattern = "Abcdef_ghi_*_(\\d{8})_(\\d{4})_\\w+";

Thanks In Advance.

Read a regex tutorial. * doesn't mean what you think it means. — Biffen
– Biffen, Commented Apr 24, 2015 at 11:19
String pattern = "Abcdef_ghi_[\\d.-]+_(\\d{8})_(\\d{4})_[.\\w]+"; — Avinash Raj
– Avinash Raj, Commented Apr 24, 2015 at 11:20
You should tell us 1st what's the fixed part and what's the dynamic part expected — sam
– sam, Commented Apr 24, 2015 at 11:38
Here i want to get 20150424 and 1642 from stringToFind variable. That's my requirement.Which I got it from below answers. — JSP
– JSP, Commented Apr 24, 2015 at 13:20

Wiktor Stribiżew · Accepted Answer · 2015-04-24 11:19:59Z

2

You can use this:

 String pattern = "Abcdef_ghi_.*(\\d{8})_(\\d{4})_\\w+(?:\\.\\w+)*";

Output:

MATCH 1
1.  [19-27] `20150424`
2.  [28-32] `1642`

answered Apr 24, 2015 at 11:19

Wiktor Stribiżew

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3 Comments

JSP Over a year ago

stribizhew, its worked as expected.Thanks a lot for your reply.

Wiktor Stribiżew Over a year ago

You are welcome. You should also be more specific, I felt you were using matches method, that is why I extended the pattern till the end. I'd recommend using matcher.find(), but it is really up to you.

sam Over a year ago

@Honey, please accept this answer since it answered your question

anubhava · Accepted Answer · 2015-04-24 11:19:57Z

1

Instead of _* you need to use _.*?.

You can use:

String pattern = "Abcdef_ghi_.*?_(\\d{8})_(\\d{4})_\\w+.*";

answered Apr 24, 2015 at 11:19

anubhava

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3 Comments

JSP Over a year ago

Anubhava, You have to keep \\d instead of \d.Even after correcting this , its not working.Thanks for your reply

anubhava Over a year ago

How are you matching? Are you calling String#matches() method?

anubhava Over a year ago

Also I didn't use \d anywhere I have kept it as \\d

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