Hi !
Featured games (85)
games approved by the League of Dukes
Games in Showcase (622)
Games in Android Showcase (176)
games submitted by our members
Games in WIP (674)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  Regexp and back reference  (Read 1233 times)
0 Members and 1 Guest are viewing this topic.
Offline Bombadil

Senior Devvie

« Posted 2005-06-14 14:52:28 »

There's some difference between Java's regexp plus back reference and the GAWK regexp methods.

I would like to, for example, cut the pure filename out of a string: no path and no ending. (I know the File class and its handy methods but it's for strings only and a general question).
Of course with several lines of code it's well possible. :-)

However is it also possible with the String.replaceFirst(regexp, replace) method or a one-liner with Pattern.compile("regexp").matcher(string).etc ?

With GAWK and its powerful gensub I'd do something like this:
  $0 = "c:/Path/Filename.png";
  gensub(/.+\\(.+)\.png$/, "\\1", "g")
in order to get "Filename".

In Java I couldn't figure out how to use the back reference in the replacement argument. Is it just for the regexp argument?

I'm just asking because I'm used to the one-liner of GAWK.
Offline Bombadil

Senior Devvie

« Reply #1 - Posted 2005-06-15 08:29:48 »

Well, then two replaceFirst in one line... Unlike AWK we're OO.

thestring.replaceFirst(".+/", "").replaceFirst("\\.png", "")
Pages: [1]
  ignore  |  Print  
You cannot reply to this message, because it is very, very old.

basil_ (33 views)
2015-09-30 17:04:40

shadowstryker (17 views)
2015-09-29 15:55:06

TheSpaceHedgehog (23 views)
2015-09-29 01:58:48

GamerC4 (46 views)
2015-09-24 21:10:38

GamerC4 (67 views)
2015-09-24 21:09:48

htuy (22 views)
2015-09-24 04:57:24

htuy (31 views)
2015-09-24 04:56:35

htuy (23 views)
2015-09-24 04:56:09

htuy (22 views)
2015-09-24 04:47:33

Roquen (59 views)
2015-09-21 12:54:28
Math: Inequality properties
by Roquen
2015-10-01 13:30:46

Math: Inequality properties
by Roquen
2015-09-30 16:06:05

HotSpot Options
by Roquen
2015-08-29 11:33:11

Rendering resources
by Roquen
2015-08-17 12:42:29

Rendering resources
by Roquen
2015-08-17 09:36:56

Rendering resources
by Roquen
2015-08-13 07:40:51

Networking Resources
by Roquen
2015-08-13 07:40:43

List of Learning Resources
by gouessej
2015-07-09 11:29:36 is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!