How to use java String.replaceAll(string regex,string replacement) to get what I want?

Question

Codes:

  String etr = "fdsfsdaf\nTKT:1101234567890FSDFD";

the format is like ".+\nTKT:\d{13}.+".

how to get first 3 numberic after "\nTKT:" using String.replaceAll to implement? In this example, I want to get is "110". Exclude Matcher,Pattern and Other String method like indexOf(). Because I found the Regex include "?:","?<",but I have tried but failed,something like":

      replaceAll(".+\nTKT:(?=[\\d{3}])\\d{10}.+","");

Thanks in advance.I just know some basic use for Regex.

So you want to remove 110?

assylias
– assylias

2013-10-15 06:55:27 +00:00
Commented Oct 15, 2013 at 6:55 — assylias
– assylias, Commented Oct 15, 2013 at 6:55
no, I want to get 110

Sstx
– Sstx

2013-10-15 06:55:52 +00:00
Commented Oct 15, 2013 at 6:55 — Sstx
– Sstx, Commented Oct 15, 2013 at 6:55

assylias · Accepted Answer · 2013-10-15 09:51:12Z

1

Or you can replaceAll(".+\nTKT:(\\d{3})\\d{10}.+", "$1");

answered Oct 15, 2013 at 9:51

assylias

330k84 gold badges680 silver badges806 bronze badges

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

1 Comment

Sstx Over a year ago

upvoted, this answer is answered by Anirudh before.As I want to set the replaceAll result Empty when the regex is not match the input,he modified the answer. Anymore,thank you.

Anirudha · Accepted Answer · 2013-10-15 07:05:49Z

0

Instead of replacing,you should match it

Matcher m=Pattern.compile(".+\nTKT:(\\d{3})\\d{10}.+").matcher(input);
if(m.find())
{
    m.group(1);
}

edited Oct 15, 2013 at 7:05

answered Oct 15, 2013 at 6:55

Anirudha

32.9k8 gold badges71 silver badges90 bronze badges

2 Comments

Sstx Over a year ago

Hi,Anirudh,thanks for your answer,it is correct,but there has some other problem, if the etr doesn't match the regex, how can let the replaceAll result is EMPTY?Is it can implemented just by modify the Regex?

Sstx Over a year ago

Hmm,exclude Matcher,Pattern.. though this is an correct answer.

Collectives™ on Stack Overflow

How to use java String.replaceAll(string regex,string replacement) to get what I want?

2 Answers 2

1 Comment

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related