package sendmail;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;

/**
 * Created by caesar-84 on 9/28/16.
 */
public class SslGmailSender
{
    private String username;
    private String password;
    private Properties props;

public SslGmailSender(String username, String password)
{
    this.username = username;
    this.password = password;

    props = new Properties();
    props.put("mail.smtp.host", "smtp.gmail.com");
    props.put("mail.smtp.socketFactory.port", "465");
    props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.port", "465");
}

public void send(String subject, String text, String from, String to)
{
    Session thisSession = Session.getInstance(props, new Authenticator()
    {
        public PasswordAuthentication getPasswordAuthentification()
        {
            return new PasswordAuthentication(SslGmailSender.this.username, SslGmailSender.this.password);
        }
    });
    try
    {
        MimeMessage message = new MimeMessage(thisSession);
        message.setFrom(new InternetAddress(from));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
        message.setSubject(subject);
        message.setText(text);

        Transport.send(message);
        System.out.println("Yor e-mail has been sent.");
    }
    catch (MessagingException ex)
    {
        ex.printStackTrace();
    }
}

public SslGmailSender(String username, String password)
{
    this.username = username;
    this.password = password;

    props = new Properties();
    props.put("mail.smtp.host", "smtp.gmail.com");
    props.put("mail.smtp.socketFactory.port", "465");
    props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.port", "465");
}

public void send(String subject, String text, String from, String to)
{
    Session thisSession = Session.getInstance(props, new Authenticator()
    {
        public PasswordAuthentication getPasswordAuthentification()
        {
            return new PasswordAuthentication(SslGmailSender.this.username, SslGmailSender.this.password);
        }
    });
    try
    {
        MimeMessage message = new MimeMessage(thisSession);
        message.setFrom(new InternetAddress(from));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
        message.setSubject(subject);
        message.setText(text);

        Transport.send(message);
        System.out.println("Yor e-mail has been sent.");
    }
    catch (MessagingException ex)
    {
        ex.printStackTrace();
    }
}

package sendmail;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * Created by caesar-84 on 9/28/16.
 */
public class Main
{
    public static void main(String[] args)
    {
        String username = "";
        String password = "";
        String subject = "";
        String text = "";
        String to = "";
        try(BufferedReader console = new BufferedReader(new InputStreamReader(System.in)))
        {
            System.out.print("Your e-mail: ");
            username = console.readLine();
            System.out.print("Password: ");
            password = console.readLine();
            System.out.print("Recipient: ");
            to = console.readLine();
            System.out.print("Message subject: ");
            subject = console.readLine();
            System.out.println("Text to send (type "-END" to finish):");
            String typedText = "";
            StringBuilder sb = new StringBuilder();
            while (!typedText.contains("-END"))
            {
                typedText = console.readLine();
                sb.append(typedText).append("n");
            }
            sb.delete(sb.length() - 4, sb.length());
            text = sb.toString();

    }
    catch (IOException ex){ex.getStackTrace();}

    String from = username;
    SslGmailSender thisSender = new SslGmailSender(username, password);
    thisSender.send(subject, text, from, to);
}

}
    catch (IOException ex){ex.getStackTrace();}

    String from = username;
    SslGmailSender thisSender = new SslGmailSender(username, password);
    thisSender.send(subject, text, from, to);
}