Replacing text using regex : Text Replace « Regular Expressions « Java Tutorial

1. Java Tutorial
2. Regular Expressions
3. Text Replace

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

public class MainClass {
  public static void main(String args[]) {
    String regex = "(\\w)(\\d)(\\w+)";

    Pattern pattern = Pattern.compile(regex);

    String candidate = "W3C";

    Matcher matcher = pattern.matcher(candidate);
    String tmp = matcher.replaceAll("$33");

    System.out.println("REPLACEMENT: " + tmp);
    System.out.println("ORIGINAL: " + candidate);
  }
}