Converting C# regular expression to Java

Question

This regular expression in C# is giving me error in java:

"<input type="hidden" name="GALX" value="(?<galx>[a-zA-Z0-9_]+)">"

Error:

Look-behind group does not have an obvious maximum length near index 60
<input type="hidden" name="GALX" value="(?<galx>[a-zA-Z0-9_]+)">

What would be the equivalent expression in Java?

First of all you should not use regex to parse HTML, see here: http://stackoverflow.com/questions/590747/using-regular-expressions-to-parse-html-why-not to see why. Secondly, what error are you getting? And thirdly, Java, by default, seems to add the ^ and $ anchors to your regex, so you will have to cater for that as well. — npinti, Jan 02 '12 at 10:02

score 0 · Accepted Answer · edited May 23 '17 at 11:48

0

This i'm guessing. I changed ' to " and escaped any "

"<input type=\"hidden\" name=\"GALX\" value=\"(?<galx>[a-zA-Z0-9_]+)\">"

Edit :: And for the named grouping of "galx" only java 7 supports this

edited May 23 '17 at 11:48

Community

answered Jan 02 '12 at 10:01

AlanFoster

sorry the ' was actually ". mistakenly changed it here – Uzair Farooq Jan 02 '12 at 10:03
@UzairFarooq I believe this answers your question however – AlanFoster Jan 02 '12 at 10:04
no...that's not the answer, I'm still getting the runtime error – Uzair Farooq Jan 02 '12 at 10:08
@UzairFarooq Like i said, are you using java 1.7 or not – AlanFoster Jan 02 '12 at 10:10
@ AlanFoster Yes you are right, I changed it to this and it works fine: "" Thanks – Uzair Farooq Jan 02 '12 at 10:19

1 Answers1