import java.util.Properties;

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class MailFunctions {
    public static Session session;

    public static void init() {
        final String username = "emailAddress";
        final String password = "emailPW";

        Properties props = new Properties();
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtp.port", "587");

        session = Session.getInstance(props, new javax.mail.Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(username, password);
            }
        });
    }

    public static void sendMail(String toMail, String subject, String text) {
        try {
            Message message = new MimeMessage(session);
            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(toMail));
            message.setSubject(subject);

            MimeBodyPart messageBodyPart = new MimeBodyPart();
            // Fill the message
            messageBodyPart.setText(text, "UTF-8", "html");

            Multipart multipart = new MimeMultipart();
            multipart.addBodyPart(messageBodyPart);

            // Put parts in message
            message.setContent(multipart);

            Transport.send(message);

        } catch (MessagingException e) {
            throw new RuntimeException(e);
        }
    }
}

/* pom dependecny
        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.4.7</version>
        </dependency>
*/