Java regex matching

Question

I need to parse through a file(built from a string) searching for occurences of a single or multiline text. Will this solution always work ? If not - how should I change it ?

private int parseString(String s){
    Pattern p = Pattern.compile(searchableText);
    Matcher m = p.matcher(s);
    int count = 0;
    while(m.find()) {
        count++;
    }

    return count;
}

polygenelubricants · Accepted Answer · 2010-10-11 01:18:53Z

1

Consider Pattern.quote if text can contain regex metacharacters.
Consider java.util.Scanner and findWithinHorizon

answered Oct 11, 2010 at 1:18

polygenelubricants

385k129 gold badges568 silver badges627 bronze badges

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

Comments

Thilo · Accepted Answer · 2010-10-11 01:25:37Z

0

For multiline strings you need to adjust the newline codes to what is the file, or (probably better) use a regular expression to be able to accept all the various combinations of \n and \r.

answered Oct 11, 2010 at 1:25

Thilo

264k107 gold badges527 silver badges674 bronze badges

Comments

user166390 · Accepted Answer · 2010-10-11 04:38:53Z

0

Consider searching for a\s+b\s+c\s+ where a, b, and c are the sequence of words (or characters if you wish) you are searching for. It may be (over) greedy, but hopefully it should give an insight. You can also perform a normalization of the text first.

answered Oct 11, 2010 at 4:38

user166390

Collectives™ on Stack Overflow

Java regex matching

3 Answers 3

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related