JAVA - Regex Issue

Question

Just testing out some special regex characters and just came across some behaviour I could not explain. An un escaped full-stop stands for any character, therefore (for example) matching 3 to "." returns true, however, when I match 3 to "[.]", it returns false. What is the cause of this?

cHao · Accepted Answer · 2012-04-22 17:07:52Z

4

Like most other metacharacters, . loses its special meaning in a character class (the []). There, it just means "a dot".

answered Apr 22, 2012 at 17:07

cHao

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dash1e · Accepted Answer · 2012-04-22 17:09:34Z

1

Inside the squares "." means full-stop and not any char.

So the regex "[.]" match "." and not "3".

answered Apr 22, 2012 at 17:09

dash1e

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