Thread: Java program to validate an email address using Regular Expressions

With this code you can check the validity of an email address using Regular Expressions.

import java.util.regex.*;
 
public class EmailValidator{
 
public static void main(String[] args){
 
 String email = "checkme@youremail.com"; 
 String regEx = "\\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}\\b";
 
 Pattern p = Pattern.compile(regEx);
 Matcher m = p.matcher(email);
 
 if(m.find()) 
 {
  System.out.println(email + " is a valid email address."); }
 else
 {
  System.out.println(email + " is a invalid email address");
 }
 }
}

Thanks for the post. I have not tested the code yet, but using InternetAddress is much more simple.

Spring 3

Originally Posted by cafeteria84

Thanks for the post. I have not tested the code yet, but using InternetAddress is much more simple.

Feel free to post other solutions.

The following code strictly validates an email address agants the RFC822 syntax :

try {
     InternetAddress addr = new InternetAddress(email, true);
     // valid email
} catch (AddressException ex) {
     // invalid email
}

Spring 3