Regex in java for finding duplicate consecutive words

Question

I saw this as an answer for finding repeated words in a string. But when I use it, it thinks This and is are the same and deletes the is

Answer 1

you should have used \b(\w+)\b\s+\b\1\b, click here to see the result...

Hope this is what you want...

Update 1

Well well well, the output that you have is

the final string after removing duplicates

import java.util.regex.*;

public class MyDup {
    public static void main (String args[]) {
    String input="This This is text text another another";
    String originalText = input;
    String output = "";
    Pattern p = Pattern.compile("\\b(\\w+)\\b\\s+\\b\\1\\b", Pattern.MULTILINE+Pattern.CASE_INSENSITIVE);
    Matcher m = p.matcher(input);
    System.out.println(m);
    if (!m.find())
        output = "No duplicates found, no changes made to data";
    else
    {
        while (m.find())
        {
            if (output == "") {
                output = input.replaceFirst(m.group(), m.group(1));
            } else {
                output = output.replaceAll(m.group(), m.group(1));
            }
        }
        input = output;
        m = p.matcher(input);
        while (m.find())
        {
            output = "";
            if (output == "") {
                output = input.replaceAll(m.group(), m.group(1));
            } else {
                output = output.replaceAll(m.group(), m.group(1));
            }
        }
    }
    System.out.println("After removing duplicate the final string is " + output);
}

Run this code and see what you get as output... Your queries will be solved...

Note

In output you are replacing duplicate by single word... Isn't it??

When I put System.out.println(m.group() + " : " + m.group(1)); in first if condition I get output as text text : text i.e. duplicates are replacing by single word.

else
    {
        while (m.find())
        {
            if (output == "") {
                System.out.println(m.group() + " : " + m.group(1));
                output = input.replaceFirst(m.group(), m.group(1));
            } else {

Hope you got now what is going on... :)

Good Luck!!! Cheers!!!