Back Referencing a Group in a Replacement Text - Java Regular Expressions

Java examples for Regular Expressions:Group

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Description

Back Referencing a Group in a Replacement Text

Demo Code

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

public class Main {
  public static void main(String[] args) {
    String regex = "\\b(\\d{3})(\\d{3})(\\d{4})\\b";
    String replacementText = "($1) $2-$3";
    String source = "1111111111, 1111111, and 1111111111";

    // Compile the regular expression
    Pattern p = Pattern.compile(regex);

    // Get Matcher object
    Matcher m = p.matcher(source);

    // Replace the phone numbers by formatted phone numbers
    String formattedSource = m.replaceAll(replacementText);

    System.out.println("Text: " + source );
    System.out.println("Formatted Text: " + formattedSource );
  }// w  w  w  .ja v  a2 s .  c om
}

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