Receiving mail with attachment using javamail API

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

class ReadAttachment{
public static void main(String [] args)throws Exception{

String host="mail.javatpoint.com";
final String user="sonoojaiswal@javatpoint.com";
final String password="xxxxx";//change accordingly

Properties properties = System.getProperties();
properties.setProperty("mail.smtp.host",host );
properties.put("mail.smtp.auth", "true");

Session session = Session.getDefaultInstance(properties,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user,password);
}
});

Store store = session.getStore("pop3");
store.connect(host,user,password);

Folder folder = store.getFolder("inbox");
folder.open(Folder.READ_WRITE);

Message[] message = folder.getMessages();
for (int a = 0; a < message.length; a++) {
System.out.println("-------------" + (a + 1) + "-----------");
System.out.println(message[a].getSentDate());

Multipart multipart = (Multipart) message[a].getContent();

for (int i = 0; i < multipart.getCount(); i++) {
BodyPart bodyPart = multipart.getBodyPart(i);
InputStream stream = bodyPart.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(stream));

while (br.ready()) {
System.out.println(br.readLine());
}
System.out.println();
}
System.out.println();
}

folder.close(true);
store.close();
}
}

LOAD THE JAR FILE :  C:\> set classpath=mail.jar;activation.jar;

COMPILE THE SOURCE FILE: C:\> javac ReadAttachment.java

RUN BY :C:\> java ReadAttachment

Send Mail using Java-Mail API

import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class sendMail
{
public static final String MAIL_SERVER = "smtp.gmail.com";
public static final String USERNAME = "Your gmail user name should be here";
public static final String PASSWORD = "gmail password";
public static String fromAddress = null;
public static String toAddress = null;

public static void main(String[] args)
{
try
{
fromAddress = "gmail email id";
String toAddress = "xyz@psdf.com";
String subject = "This is a test Message";
String message = "Hello Hows u?";

Properties properties = System.getProperties();
properties.put("mail.smtps.host", MAIL_SERVER);
properties.put("mail.smtps.auth", "true");

Session session = Session.getInstance(properties);
MimeMessage msg = new MimeMessage(session);

msg.setFrom(new InternetAddress(fromAddress));
msg.addRecipients(Message.RecipientType.TO, toAddress);
msg.setSubject(subject);
msg.setText(message);

Transport tr = session.getTransport("smtp");
tr.connect(MAIL_SERVER, USERNAME, PASSWORD);
tr.sendMessage(msg, msg.getAllRecipients());
tr.close();

}
catch (AddressException ex)
{
System.out.println("in addressException");
System.out.println(ex.getMessage());

}
catch (MessagingException ex)
{

System.out.println(ex.getMessage());
}
System.out.println("message successfully sent");
}

}