Java Program to send Email through SMTP server of Gmail. API used: Java Mail API by Oracle.

SendMail.java

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

class Mailer{  
    public static void send(String from,String password,String to,String sub,String msg){  
        //Get properties object    
        Properties 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");    
        
        //get Session   
        Session session = Session.getDefaultInstance(props, 
            new javax.mail.Authenticator() {    
                @Override
                protected PasswordAuthentication getPasswordAuthentication() {    
                return new PasswordAuthentication(from,password);  
                }    
            }
        ); 
        
        //compose message    
        try {    
            MimeMessage message = new MimeMessage(session);    
            message.addRecipient(Message.RecipientType.TO,new InternetAddress(to));    
            message.setSubject(sub);    
            message.setText(msg);    
            
            //send message  
            Transport.send(message);    
            System.out.println("message sent successfully");    
        } catch (MessagingException e) {throw new RuntimeException(e);}             
    }  
}  

public class SendMail{    
 public static void main(String[] args) {     
     Mailer.send("yourgmail mail [email protected]","your gmail Password","[email protected]","This is mail Heading","This is mail body");   
 }    
}    

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