Pattern.matches method : Pattern Match « Regular Expressions « Java Tutorial

import java.util.regex.Pattern;

public class MainClass {
  public static void main(String args[]) {

    String regex = "ad*";
    String input = "add";

    boolean isMatch = Pattern.matches(regex, input);

8.6.Pattern Match
8.6.1.Pattern.matches method
8.6.2.Find the end point of the second 'B(ond)'
8.6.3.Match Duplicate Words
8.6.4.Validate email address
8.6.5.Matching Line Boundaries in a Regular Expression
8.6.6.Regex for IP v4 Address
8.6.7.Regex for IP v6 Address