java pop mail (http://www.aviyehuda.com/blog/2009/12/17/receive-pop3-emails-using-java/)

FetchMailUsage.java

import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.Properties;

import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.search.SubjectTerm;


public class FetchMailUsage 
{
	public void fetchMail()
	{
        String host = "100.100.100.100";
        String user = "aviy";
        String password = "blabla";
        String subjectSubstringToSearch = "Test E-Mail through Java";

        Session session = Session.getInstance(new Properties());

        try {

            // Get a Store object
            Store store = session.getStore("pop3");
            store.connect(host, user, password);
            
            // Get "INBOX"
            Folder fldr = store.getFolder("INBOX");
           
            fldr.open(Folder.READ_WRITE);
            
            int count = fldr.getMessageCount();
            System.out.println(count  + " total messages");

            // Message numbers start at 1
            for(int i = 1; i <= count; i++) {
				// Get  a message by its sequence number
                Message m = fldr.getMessage(i);

                // Get some headers
                Date date = m.getSentDate();
                Address [] from = m.getFrom();
                String subj = m.getSubject();
                String mimeType = m.getContentType();
                System.out.println(date + "\t" + from[0] + "\t" +
                                    subj + "\t" + mimeType);
            }

            // Search for e-mails by some subject substring
            String pattern = subjectSubstringToSearch;
            SubjectTerm st = new SubjectTerm(pattern);
            // Get some message references
            Message [] found = fldr.search(st);

            System.out.println(found.length +
                                " messages matched Subject pattern \"" +
                                pattern + "\"");

            for (int i = 0; i < found.length; i++) {
                Message m = found[i];
                // Get some headers
                Date date = m.getSentDate();
                Address [] from = m.getFrom();
                String subj = m.getSubject();
                String mimeType = m.getContentType();
                System.out.println(date + "\t" + from[0] + "\t" +
                                    subj + "\t" + mimeType);

                Object o = m.getContent();
                readContent(m);

                // Uncomment to set "delete" flag on the message
                //m.setFlag(Flags.Flag.DELETED,true);

            } //End of for

            // "true" actually deletes flagged messages from folder
            fldr.close(true);
            store.close();

        }
        catch (MessagingException mex) {
            mex.printStackTrace();
        }
        catch (IOException ioex) {
            ioex.printStackTrace();
        }
        
       
    }
	
	public static void readContent(Object o) throws IOException, MessagingException{
	    if (o instanceof String) {
            System.out.println("**This is a String Message**");
            System.out.println((String)o);
        }
        else if (o instanceof Multipart) {
            System.out.print("**This is a Multipart Message.  ");
            Multipart mp = (Multipart)o;
            int count3 = mp.getCount();
            System.out.println("It has " + count3 +
                " BodyParts in it**");
            for (int j = 0; j < count3; j++) {
                // Part are numbered starting at 0
                BodyPart b = mp.getBodyPart(j);
                String mimeType2 = b.getContentType();
                System.out.println( "BodyPart " + (j + 1) +
                                    " is of MimeType " + m.getContentType());

                Object o2 = b.getContent();
                if (o2 instanceof String) {
                    System.out.println("**This is a String BodyPart**");
                    System.out.println((String)o2);
                }
                else if (o2 instanceof Multipart) {
                    System.out.print(
                        "**This BodyPart is a nested Multipart.  ");
                    Multipart mp2 = (Multipart)o2;
                    int count2 = mp2.getCount();
                    System.out.println("It has " + count2 +
                        "further BodyParts in it**");
                }
                else if (o2 instanceof InputStream) {
                    System.out.println(
                        "**This is an InputStream BodyPart**");
                }
            } //End of for
        }
        else if (o instanceof InputStream) {
            System.out.println("**This is an InputStream message**");
            InputStream is = (InputStream)o;
            // Assumes character content (not binary images)
            int c;
            while ((c = is.read()) != -1) {
                System.out.write(c);
            }
        }
	}
	
    public static void main(String[] args) 
    {
    	(new FetchMailUsage()).fetchMail();
    }

        
    

} //End of class