Read your gmail using Java code

package mailtest.control;

import com.sun.mail.pop3.POP3SSLStore;
import java.io.IOException;
import java.security.Security;
import java.util.ArrayList;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.FetchProfile;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Part;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.URLName;
import javax.swing.JOptionPane;
import mailtest.config.ConfigurationData;
import mailtest.customgui.GUILogger;

/**
*
* @author Mohamed.Sami
*/
public class MailControl {

    private ConfigurationData configurationData = new ConfigurationData();
    private GUILogger gUILogger = GUILogger.getInstance();
    private Session session;
    private Store store;
    private Folder folder;
    private Message[] messages;
    private FetchProfile fetchProfile;
    private Properties properties;
    private String username;
    private String password;

    public MailControl() {
        init();
    }

    public final void init() {

        Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
        properties = configurationData.getProperties();

        if (properties != null) {

            session = Session.getInstance(properties, null);
            int port = Integer.parseInt(properties.getProperty("port"));
            URLName urln = new URLName(properties.getProperty("protocal"), properties.getProperty("host"), port, null, username, password);
            gUILogger.logInfo("Started connecting to mail inbox ... ");
            store = new POP3SSLStore(session, urln);


        } else {
            JOptionPane.showMessageDialog(null,
                    " No properties loaded- Mail Connector Failed .",
                    "Mail client Error", JOptionPane.ERROR_MESSAGE);
            gUILogger.logInfo("No properties loaded- Mail Connector Failed");
        }



    }

    public Message[] readAllMessages() {

        if (properties == null) {
            gUILogger.logInfo("No properties loaded- Mail Connector Failed");
            return null;
        }
        try {
            store.connect(properties.getProperty("host"), username, password);
        } catch (MessagingException ex) {
            JOptionPane.showMessageDialog(null,
                    " couldn't connect to mail server ,please make sure you entered to right(username,password). Or make sure of your mail client connect configuration under props/config.properties file.",
                    "Mail client Error", JOptionPane.ERROR_MESSAGE);
            gUILogger.logInfo("Mail Connector Failed -" + ex);

        }
        try {

            folder = store.getDefaultFolder();
            folder = folder.getFolder("INBOX");
            folder.open(Folder.READ_ONLY);
            gUILogger.logInfo("Message Count Found " + folder.getMessageCount());
            gUILogger.logInfo("New Message Count " + folder.getNewMessageCount());
            gUILogger.logInfo("=========================================");
            Message[] newmessages = folder.getMessages();
            FetchProfile fp = new FetchProfile();
            fp.add(FetchProfile.Item.ENVELOPE);
            folder.fetch(newmessages, fp);
            messages = newmessages;
            return messages;
        } catch (MessagingException ex) {
            JOptionPane.showMessageDialog(null,
                    "Reading the messages INBOX failed -" + ex,
                    "Mail client Error", JOptionPane.ERROR_MESSAGE);
            gUILogger.logInfo("Reading the messages INBOX failed -" + ex);
        }



        return messages;

    }

    public void refresh() {
        readAllMessages();
    }

    public ConfigurationData getConfigurationData() {
        return configurationData;
    }

    public void setConfigurationData(ConfigurationData configurationData) {
        this.configurationData = configurationData;
    }

    public FetchProfile getFetchProfile() {
        return fetchProfile;
    }

    public void setFetchProfile(FetchProfile fetchProfile) {
        this.fetchProfile = fetchProfile;
    }

    public Folder getFolder() {
        return folder;
    }

    public void setFolder(Folder folder) {
        this.folder = folder;
    }

    public GUILogger getgUILogger() {
        return gUILogger;
    }

    public void setgUILogger(GUILogger gUILogger) {
        this.gUILogger = gUILogger;
    }

    public Message[] getMessages() {
        return messages;
    }

    public void setMessages(Message[] messages) {
        this.messages = messages;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Properties getProperties() {
        return properties;
    }

    public void setProperties(Properties properties) {
        this.properties = properties;
    }

    public Session getSession() {
        return session;
    }

    public void setSession(Session session) {
        this.session = session;
    }

    public Store getStore() {
        return store;
    }

    public void setStore(Store store) {
        this.store = store;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    @Override
    public void finalize() {
        try {
            try {
                folder.close(true);
                store.close();
            } catch (MessagingException ex) {
                ex.printStackTrace();
            }
            super.finalize();
        } catch (Throwable ex) {
            Logger.getLogger(MailControl.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public ArrayList<String> transform(Message[] messages) {

        if (messages == null || messages.length == 0) {
            gUILogger.logInfo("No messages found to transform");
            return null;
        }

        ArrayList<String> arrayList = new ArrayList<String>();
        String string = null;
        for (int i = 0; i < messages.length;
                i++) {

            try {


                Address[] addressList = messages[i].getFrom();
                for (int j = 0; j < addressList.length; j++) {
                    System.out.println("From address #" + j + " : " + addressList[j].toString());
                }
                System.out.println("Receive date :" + messages[i].getSentDate());
                if (messages[i].isMimeType("text/plain")) {

                    string = messages[i].getContent().toString();


                } else {
                    string = handleMultipart(messages[i]);


                }
                if (string != null) {
                    arrayList.add(string);
                    string = null;
                }

            } catch (MessagingException ex) {
                JOptionPane.showMessageDialog(null,
                        "Messages transformation failed :" + ex,
                        "Mail client Error", JOptionPane.ERROR_MESSAGE);
                gUILogger.logInfo("Messages transformation failed :" + ex);
            } catch (IOException ex) {
                JOptionPane.showMessageDialog(null,
                        "Messages I/O transformation failed :" + ex,
                        "Mail client Error", JOptionPane.ERROR_MESSAGE);
                gUILogger.logInfo("Messages I/O transformation failed : " + ex);
            }


        }
        return arrayList;
    }

    public String handleMultipart(Message msg) {

        String content = null;
        try {
            String disposition;
            BodyPart part;
            Multipart mp = (Multipart) msg.getContent();

            int mpCount = mp.getCount();
            for (int m = 0; m < mpCount; m++) {
                part = mp.getBodyPart(m);
             
                disposition = part.getDisposition();
                if (disposition != null && disposition.equals(Part.INLINE)) {
                    content = part.getContent().toString();
                } else {
                    content = part.getContent().toString();

                }
            }
        } catch (IOException ex) {
            JOptionPane.showMessageDialog(null,
                    "Messages - Parts - Input/output transformation failed :" + ex,
                    "Mail client Error", JOptionPane.ERROR_MESSAGE);
            gUILogger.logInfo("Messages - Parts - Input/output transformation failed :" + ex);
        } catch (MessagingException ex) {
            JOptionPane.showMessageDialog(null,
                    "Messages - Parts - transformation failed :" + ex,
                    "Mail client Error", JOptionPane.ERROR_MESSAGE);
            gUILogger.logInfo("Messages - Parts - transformation failed :" + ex);
        }
        return content;
    }
}