Regular Expression PatternSyntaxException error

Question

I'm not sure why the following is giving me a PatternSyntaxException:

Pattern regex = Pattern.compile("\\[[12|\\[|\\|\\||\\^\\^|\\^|\\_|\\_\\_|\\=|abcdefgABCDEFG|\\|");

It claims the error is at |a which I don't really understand.

Niall Byrne · Accepted Answer · 2011-10-24 01:33:27Z

2

I don't see a matching ']' to the one that isn't escaped...

 Pattern regex = Pattern.compile("\\[[12|...
                                     |This one

answered Oct 24, 2011 at 1:33

Niall Byrne

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Comments

Dave Newton · Accepted Answer · 2011-10-24 01:32:32Z

0

Are the characters inside the unescaped pipes supped to be a character range? Of so, they should be in square brackets.

[A-Ga-g]

It's an error because the pipe character is a regex logical operator (or).

answered Oct 24, 2011 at 1:32

Dave Newton

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