What is the proper way of inserting a pipe into a Java Pattern expression?
I actually want to use a pipe as a delimiter and not the or operator.
I.E:
"hello|world".split("|"); --> {"hello", "world"}
views:
530answers:
5
+1
A:
"hello|world".split("\\\\|"); --> {"hello", "world"}
First set of "\\" only yields the \ as the delimiter. Therefore 2 sets are needed to escape the pipe.
Absolute0
2009-09-16 13:53:53
right solution, wrong explanation. The regexp needed is \| (two characters) and if you want to put a backslash in the string in Java, you need to use a double backslash to tell Java the backslash isn't being used to escape the next character.
Jason S
2009-09-16 13:59:06
shit stackoverflow escaped my slashes :(
Absolute0
2009-09-16 14:11:26
That's what code sections are for :-)
Joey
2009-09-16 15:56:23
Why don't you just delete this answer and accept Kevin's?
Alan Moore
2009-09-17 01:44:38
Kevin's is wrong you need 4 slashes.
Absolute0
2009-09-17 12:20:41
+1
A:
I have this problem a lot (encoding a regex into a Java String), so I have bookmarked the regex tool at fileformat.info; it has a nifty function where it will show you the Java String representation of a regex after you test it.
Hank Gay
2009-09-16 14:01:58
That's pretty cool!You could also simply play around with watch statements in the eclipse debug environment.
Absolute0
2009-09-16 14:16:17
A:
As already said by Kevin, you need to escape it.
Also if you're using Eclipse or you want to have a WYSIWYG editor for regexps in Java, visit myregexp.com from where you either get as Eclipse plugin or use as applet IMO the best Java regex util I've ever seen.
Esko
2009-09-16 15:28:46