How to send email from Gmail in Java.

import java.io.*;
import java.net.InetAddress;
import java.util.Properties;
import java.util.Date;
import javax.mail.*;
import javax.mail.internet.*;

// Created by Amit Gaur May-4-2009

// How to send email from Gmail in Java

public class GMail
{
public static void main(String ss[])
{
String host = "smtp.gmail.com";
String username = "a";// Put here only Gmail username not full email id
String password = "amitamit";// Put here Gmail password
int i;
i=1;
try
{
Properties props = new Properties();
props.put("mail.smtps.auth", "true");
//props.put("mail.from", "a@gmail.com");
props.put("mail.from",""); // put here from full gmail email id
Session session = Session.getInstance(props, null);
Transport t = session.getTransport("smtps");
t.connect(host, username, password);
MimeMessage msg = new MimeMessage(session);
msg.setFrom();
//msg.setRecipients(Message.RecipientType.TO, "a@gmail.com");
msg.setRecipients(Message.RecipientType.TO, ""); // put here receiver mail id

msg.setSubject("hello amit"+i);
msg.setSentDate(new Date());
msg.setText("Hello, Hi!"+i);
t.sendMessage(msg, msg.getAllRecipients());

}
catch(Exception ee)
{
System.out.println(ee.toString());
}
}
}