Working with simple groups : Group « Regular Expressions « Java Tutorial

1. Java Tutorial
2. Regular Expressions
3. Group

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

public class MainClass {
  public static void main(String args[]) {
    Pattern p = Pattern.compile("\\w\\d");
    String candidate = "A6 is my favorite";

    Matcher matcher = p.matcher(candidate);

    if (matcher.find()) {
      String tmp = matcher.group(0);
      System.out.println(tmp);
    }
  }
}