Regex in java, group matching

Question

Hello how does java and regex group work. For ex. I want to match any text 'something', the way I'd match this is .+\s+'(.+)'{1}, how can I replace any text 'something' with something?

Meaning replace matched string with 1st matched group.

Just FYI, your {1} is redundant -- {1} is implied on every atom. — cdhowie
– cdhowie, Commented Dec 13, 2010 at 14:59
please give a more specific example, e.g. exact input ABCXYZ, exact desired output ABC123 or whatever. — Jason S
– Jason S, Commented Dec 13, 2010 at 15:00
For regular expressions, I always go check on the interwebz, on sites like fileformat.info/tool/regex.htm — Riduidel
– Riduidel, Commented Dec 13, 2010 at 15:05
@cdhowie, the {1} is also only checking for a single ' which is not likely what the OP intended. — Brad
– Brad, Commented Dec 13, 2010 at 15:07
@Brad: But the ' already does exactly that. ' is equivalent to '{1}. And {1} applied anywhere on a regex is meaningless and redundant, since it will never modify any regex's behavior. — cdhowie
– cdhowie, Commented Dec 13, 2010 at 15:08

jjnguy · Accepted Answer · 2010-12-13 15:04:43Z

6

If you just want to remove the single quotes, the following will work.

yourString.replaceAll("'([^']+)'", "$1");

That will search for 2 quotes with text in between. And replace it with only the text.

System.out.println("any text 'something'".replaceAll("'([^']+)'", "$1"));

Prints any text something

answered Dec 13, 2010 at 15:04

jjnguy

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