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  4. Java Regex 2 - Duplicate Words
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Java Regex 2 - Duplicate Words

  • ANJALI78
     + 1 comment

    import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern;

    public class DuplicateWords {

    public static void main(String[] args) {

    String regex = "\\b(\\w+)(\\s\\1\\b)+";
    Pattern p = Pattern.compile(regex,Pattern.CASE_INSENSITIVE);

    Scanner in = new Scanner(System.in);
    int numSentences = Integer.parseInt(in.nextLine());

    while (numSentences-- > 0) {
        String input = in.nextLine();

        Matcher m = p.matcher(input);

        // Check for subsequences of input that match the compiled pattern
        while (m.find()) {
            input = input.replaceAll(m.group(),m.group(1));
        }

        // Prints the modified sentence.
        System.out.println(input);
    }

    in.close();
}

    }