JAVA REGEX:Make nested same values into single group

Question

I have a Question in regex Expressions.

I want to make nested same values into a single group.

But,I was trying to using regular expression i won't work.

Example String:

<one listtype="NumberList1">one</one>
<one listtype="NumberList1">one</one>
<one listtype="NumberList1">one</one>

I want to get the three <one></one> tag as a single group.

How can I do this??

My regex pattern is:

Pattern pattern = Pattern.compile("(<one (.*?)>(.*?)</one>)+");
    Matcher matcher = pattern.matcher(val);
    while (matcher.find()) {
        System.out.println("group 1: " + matcher.group(1));
        }

My result is:

 group 1:<one listtype="NumberList1">one</one>
 group 1:<one listtype="NumberList1">one</one>
 group 1:<one listtype="NumberList1">one</one>

I want:

group 1:<one listtype="NumberList1">one</one><one listtype="NumberList1">one</one><one listtype="NumberList1">one</one>

I want to make this as a single group.

How can i do this?

Tim Biegeleisen · Accepted Answer · 2017-04-10 04:13:05Z

1

If you want to match three such <one> tags in succession, then just use an appropriate pattern:

Pattern pattern = Pattern.compile("((?:<one (?:.*?)>(?:.*?)</one>\\s*){3})");
Matcher matcher = pattern.matcher(val);
while (matcher.find()) {
    System.out.println("group 1: " + matcher.group(1));
}

Demo here:

Rextester

answered Apr 10, 2017 at 4:13

Tim Biegeleisen

526k32 gold badges324 silver badges399 bronze badges

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

9 Comments

Tim Biegeleisen Over a year ago

Sorry, the regex I was using had a slight problem, it appears to be working now.

Mari Selvan Over a year ago

Thanks bro.But,just in case it is more then 3 how can i capture bro.

Tim Biegeleisen Over a year ago

Just change {3} to the number you want or use * for any number.

Mari Selvan Over a year ago

I'm trying this ((?:<one (?:.*?)>(?:.*?)</one>\\s*){*}) bro.But, It's given an Error like this

Exception in thread "main" java.util.regex.PatternSyntaxException: Illegal repetition near index 33 ((?:<one (?:.*?)>(?:.*?)</one>\s*){*})

Tim Biegeleisen Over a year ago

I have answered your question. Don't bro me if you don't know me.

|

Collectives™ on Stack Overflow

JAVA REGEX:Make nested same values into single group

1 Answer 1

Rextester

9 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

9 Comments

Your Answer

Sign up or log in

Post as a guest

Related