CODEWITHSUNDEEP
regex
shell
shell

Reputation: 401

Regex group matching in Java

I m trying to use regex to match the following string

[one[two[three[four|five]|six|seven]

I wanted them in three groups

[one[two[three , [four|five] ,|six|seven]

This is what i have come up with so far 

(\\].*) for  |six|seven] and `(\\[.*\\[)` for [one[two[three

and I m finding it difficult to match the last group which is [four|five]

Upvotes: 0

Views: 34

Answers (1)

Vulpo
Vulpo

Reputation: 893

With the import:

import java.util.regex.*;

If the number of elements does not change (as you did not specified), you can use the following:

    Pattern pattern = Pattern.compile("(\\[.+\\[.+)(\\[.+\\|.+])(\\|.+\\|.+)");
    Matcher matcher = pattern.matcher("[one[two[three[four|five]|six|seven]");

    //execute matching (required to iterate over groups)
    boolean matched = matcher.matches();

    for(int i=0; i <= matcher.groupCount(); i++) {
        System.out.println("Group " + i + ": " + matcher.group(i));
    }

\ regex escapers are escaped, so that Java does not use them as escapers instead of letting them to the regex tool. I used the \ escapers because you want to match literal |, not interpreting them as or operator.

. Matches every character except line terminators.

Upvotes: 1

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