import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

public class NotificationEmail{

  private String from = "email@host.com";
  private String to = "emailto@host.com";

  // Authentication Parameters
  String host = "smtp.gmail.com";
  String port = "465";
  String username = "username";
  String password = "password";

  public void sendMail(String message, String subject ,String to){
    Properties props = new Properties();
    props.setProperty("mail.transport.protocol", "smtps");
    props.setProperty("mail.smtps.auth", "true");
    props.setProperty("mail.host", host);
    props.setProperty("mail.port", port);
    props.setProperty("mail.user", username);
    props.setProperty("mail.password", password);
    Session session = Session.getDefaultInstance(props, null);
    Transport transport = session.getTransport("smtp");
    MimeMessage mimeMessage = new MimeMessage(session);
    Multipart multiPart = new MimeMultipart();
    mimeMessage.setSubject(subject);
    mimeMessage.addRecipient(RecipientType.TO, new InternetAddress(toAddress));
    MimeBodyPart textBodyPart = new MimeBodyPart();
    textBodyPart.setContent(message, "text/plain");
    multiPart.addBodyPart(textBodyPart);
    mimeMessage.setContent(multiPart);
    mimeMessage.setFrom(new InternetAddress(fromAddress));
    transport.connect();
    transport.sendMessage(mimeMessage, mimeMessage.getAllRecipients());
    transport.close();
  }

}