Java Regular Expression processing

Question

if I have a text

R 26 bla bla bla bla R 25 bla bla R 25/30 bla bla bla S 30/50/30 bla bla

and I have a regex

[RS] (\\d+|\\d+/\\d+|\\d+/\\d+/\\d+)

which will match the bold data ... now , I want a code that returns for me the bold expressions + the following data.

For example , I want the following pairs:

R 26 : bla bla bla bla
R 25 : bla bla
R 25/30 : bla bla bla
S 30/50/30 : bla bla

may be this image will be clearer :

https://i.sstatic.net/xMerw.png

" I want a code " - is that a 'plz sendz the codez' variant? — Mitch Wheat
– Mitch Wheat, Commented Mar 20, 2011 at 1:06

adarshr · Accepted Answer · 2011-03-20 01:15:44Z

2

Here you go!

Pattern pattern = Pattern.compile("([RS] (\\d+|\\d+/\\d+|\\d+/\\d+/\\d+)) ([^RS]*)");

Matcher matcher = pattern.matcher("R 26 bla bla bla bla R 25 bla bla R 25/30 bla bla bla S 30/50/30 bla bla");

while(matcher.find()) {
    System.out.println(matcher.group(1) + " " + matcher.group(3));
}

answered Mar 20, 2011 at 1:15

adarshr

62.8k24 gold badges146 silver badges175 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

ridgerunner Over a year ago

This implements the Java code but the regex is the same as the original which does not work.

adarshr Over a year ago

@ridgerunner - I only paste code once I verify that they work. The orignal RegEx had an escaping issue. This one is different.

ridgerunner · Accepted Answer · 2011-03-20 04:08:54Z

0

The order of the alternatives is important. With your original regex, the second and third alternatives will never match. Reversing their order fixes the problem like so:

Pattern regex = Pattern.compile("([RS] (\\d+/\\d+/\\d+|\\d+/\\d+|\\d+)) ([^RS]*)");

answered Mar 20, 2011 at 4:08

ridgerunner

34.6k6 gold badges60 silver badges70 bronze badges

Collectives™ on Stack Overflow

Java Regular Expression processing

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related