CODEWITHSUNDEEP
javaregexduplicates
Shar
Shar

Reputation: 11

I use regex for removing duplicate words in a string

but it remove white space. I don't want to remove white space! What should I do?

Original text

I like like like this movie, it was so so so good good good.

Remove duplicates

I likelike this movie, it was soso goodgood.

Here is my code:

 String result = s.replaceAll("(?i)\\b([a-z]+)\\b(?:\\s+\\1\\b)+", "$1$1");

Upvotes: 0

Views: 869

Answers (5)

Nacimota
Nacimota

Reputation: 23225

As Dawood ibn Kareem points out in the comments, if you want a space between words, why don't you add a space in your replacement pattern, like so:

String result = s.replaceAll("(?i)\\b([a-z]+)\\b(?:\\s+\\1\\b)+", "$1 $1");

Upvotes: 1

Robo Mop
Robo Mop

Reputation: 3553

Updated Answer

Sorry for posting a second answer, but I just want to ascertain that you get notified of this answer.

String h = s.replaceAll("(?i)\\b([a-z]+)\\b((?:\\s+\\1\\b)+)", "$2");
h = h.replaceAll("\\s+", " "));

This should remove the last repeated word :)

Upvotes: 0

user4910279
user4910279

Reputation:

Try this.

String result = s.replaceAll("(?i)(\\b\\w+\\b)\\s+\\1", "$1");

Upvotes: 0

Amran Hossain
Amran Hossain

Reputation: 152

/**
 *
 * @author Md. Amran Hossain
 */
public class DuplicateWordRemove {

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {
    String s = "like like like";
    // TODO code application logic here
    String result = s.replaceAll("(?i)\\b([a-z]+)\\b(?:\\s+\\1\\b)+", "$1");
    System.out.println(""+result);
}

}

Output

Like

Upvotes: 0

Robo Mop
Robo Mop

Reputation: 3553

Your code is correct, but you just need to replace $1$1 with $1.

EDIT: It is also mentioned in the comments, by Dawood ibn Kareem.

Upvotes: 0

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