Networking: multicast and tcp....URGENT.... plz help
is it possible for a server to be listening to two different ports????
one that is of multicast type
other is a tcp type???
is there any coding example
your help will be greatly appreciated.
its kinda urgent... plz help...thnx
To listen on 2 ports use 2 threads.
To get your questions answered:
1) don't crosspost
2) don't put URGENT in the topic
3) don't request code
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Message was edited by:
Prakash V
Message was edited by:
Prakash VHi,
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import java.net.URL;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
public class EmailProg extends JPanel implements ActionListener {
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static final private String sendmail = "send";
static final private String about = "about";
static final private String submit = "submit";
static final private String exit = "exit";
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JTextArea emailto = new JTextArea(1, 1);
JTextArea emailsubject = new JTextArea(1, 1);
JTextArea emailmessage = new JTextArea(25, 1);
//------BAG LAYOUT
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JLabel lTo = new JLabel("To:");
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JLabel lSubject = new JLabel("Subject");
JTextField cSubject = new JTextField(32);
JLabel lMessage = new JLabel("Body");
JTextArea cMessage = new JTextArea(5,32);
//====================================
public EmailProg() {
super(new BorderLayout());
//Create the toolbar.
JToolBar toolBar = new JToolBar();
addButtons(toolBar);
//Create the text area used for output. Request
//enough space for 5 rows and 30 columns.
textArea = new JTextArea(5, 30);
textArea.setEditable(false);
textArea.setText("Welcome to Jeff's email program! With this program you can compose and send emails. I hope I get a good grade on thise, and marine world finds a good use for it :-D:-D (implements really just testing the scroller!!!)");
JScrollPane scrollPane = new JScrollPane(textArea);
//Lay out the main panel.
setPreferredSize(new Dimension(450, 110));
add(toolBar, BorderLayout.NORTH);
add(scrollPane, BorderLayout.CENTER);
//==================================
protected void addButtons(JToolBar toolBar) {
JButton button = null;
//first button
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toolBar.add(button);
//third button
button = makeNavigationButton("toolbarButtonGraphics/general/About24.gif", about,"About","About");
toolBar.add(button);
//exit button
button = makeNavigationButton("toolbarButtonGraphics/general/Stop24.gif", exit, "Exit", "Exit");
toolBar.add(button);
//===================================
protected JButton makeNavigationButton(String imageName, String actionCommand, String toolTipText, String altText) {
//Look for the image.
String imgLocation = imageName;
URL imageURL = EmailProg.class.getResource(imgLocation);
//Create and initialize the button.
JButton button = new JButton();
button.setActionCommand(actionCommand);
button.setToolTipText(toolTipText);
button.addActionListener(this);
if (imageURL != null) { //image found
button.setIcon(new ImageIcon(imageURL));
} else { //no image found
button.setText(altText);
System.err.println("Resource not found: "+ imgLocation);
return button;
//=============================
public void actionPerformed(ActionEvent e) {
String cmd = e.getActionCommand();
String description = null;
// Handle each button.
if (exit.equals(cmd)){
textArea.setText("");
description = "EXITING";
System.exit(0);
if (composemail.equals(cmd)) { //first button clicked
textArea.setText("");
description = "Write new mail.";
composeWindow();
} else if (sendmail.equals(cmd)) { // second button clicked
textArea.setText("");
description = "This button does'nt do anything yet :x";
} else if (about.equals(cmd)) { // third button clicked
textArea.setText("");
description = "About this program. (See pop-up)";
coolWindow();
else if (submit.equals(cmd))
if (cFrom.getText().equals("")||cTo.getText().equals("")||cSubject.getText().equals("")||cMessage.getText().equals(""))
textArea.setText("One or more of the fields was not filled in.");
else{
try {
String smtpServer="serverhere";
String to=cTo.getText();
String from=cFrom.getText();
String subject=cSubject.getText();
String body=cMessage.getText();
send(smtpServer, to, from, subject, body);
textArea.setText("");
description = "Mail Sent.";
JOptionPane.showMessageDialog(null, "Message Sent.");
catch (Exception ex)
System.out.println("Usage: java com.lotontech.mail.SimpleSender"
+" smtpServer toAddress fromAddress subjectText bodyText");
//CLOSE THE FRAME2 WINDOW IIIIIIIIFFFFFFF SENDING IS SUCCESSFUL!!
}//end of else during send
}//end of if of submit
displayResult(description);
//============================
protected void displayResult(String actionDescription) {
textArea.append(actionDescription + newline);
//=============================
public void coolWindow() {
JFrame frame = new JFrame("About");
JTextArea filecontents = new JTextArea();
filecontents.setText("Use the tool bar to compose\n compose new emails, in which you can\n send to anyone on the\n srvhs email server. \n Fill in all the blanks before pressing send. If you dont\n you will receive an error! \n For more information about this program click on the\n information button.");
frame.getContentPane().add(filecontents, BorderLayout.CENTER);
frame.pack();
frame.setResizable(false);
frame.setSize(300,200);
frame.setVisible(true);
//===============================
public void composeWindow() {
frame2.getContentPane().setLayout(new GridBagLayout());
frame2.setResizable(false);
frame2.setSize(600,500);
frame2.setVisible(true);
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(5, 10, 5, 10);
cMessage.setLineWrap(true);
subbutton = makeNavigationButton("toolbarButtonGraphics/general/SendMail24.gif", submit,"submit","submit");
addRow(gbc, lFrom, cFrom);
addRow(gbc, lTo, cTo);
addRow(gbc, lSubject, cSubject);
addRow(gbc, lMessage, cMessage);
addRow(gbc, lSubmit, subbutton);
//===============================
private void addRow(GridBagConstraints gbc, Component left, Component right) {
gbc.gridx = GridBagConstraints.RELATIVE;
gbc.gridy = GridBagConstraints.RELATIVE;
gbc.gridheight = 1;
gbc.gridwidth = 1;
gbc.anchor = GridBagConstraints.EAST;
frame2.getContentPane().add(left, gbc);
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.anchor = GridBagConstraints.WEST;
frame2.getContentPane().add(right, gbc);
frame2.pack();
//=======================
public static void send(String smtpServer, String to, String from, String subject, String body) {
try {
Properties props = System.getProperties();
props.put("localhost", smtpServer);
Session session = Session.getDefaultInstance(props, null);
System.out.println(smtpServer);
// -- Create a new message --
Message msg = new MimeMessage(session);
// -- Set the FROM and TO fields --
msg.setFrom(new InternetAddress(from));
msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to, false));
// -- We could include CC recipients too --
// if (cc != null)
// msg.setRecipients(Message.RecipientType.CC
// ,InternetAddress.parse(cc, false));
// -- Set the subject and body text --
msg.setSubject(subject);
msg.setText(body);
// -- Set some other header information --
msg.setHeader("X-Mailer", "LOTONtechEmail");
msg.setSentDate(new Date());
// -- Send the message --
Transport.send(msg);
System.out.println("Message sent OK.");
catch (Exception ex)
ex.printStackTrace();
public static void main(String[] args) {
JFrame frame = new JFrame("EmailProg");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
EmailProg newContentPane = new EmailProg();
newContentPane.setOpaque(true);
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
}The code to retrieve the messages from SMTP
finally all working fine...
thanx guys!!!
package EmailProg;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
import java.io.*;
* A simple email receiver class.
public class SimpleReceiver
* Main method to receive messages from the mail server specified
* as command line arguments.
public static void main(String args[])
try
String popServer=args[0];
String popUser=args[1];
String popPassword=args[2];
receive(popServer, popUser, popPassword);
catch (Exception ex)
System.out.println("Usage: java com.mail.SimpleReceiver" +" popServer popUser popPassword");
System.exit(0);
* "receive" method to fetch messages and process them.
public static void receive(String popServer, String popUser, String popPassword)
Store store=null;
Folder folder=null;
try
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Properties props = System.getProperties();
Session session = Session.getDefaultInstance(props, null);
// -- Get hold of a POP3 message store, and connect to it --
store = session.getStore("pop3");
store.connect(popServer, popUser, popPassword);
// -- Try to get hold of the default folder --
folder = store.getDefaultFolder();
if (folder == null) throw new Exception("No default folder");
// -- ...and its INBOX --
folder = folder.getFolder("INBOX");
if (folder == null) throw new Exception("No POP3 INBOX");
// -- Open the folder for read only --
folder.open(Folder.READ_ONLY);
// -- Get the message wrappers and process them --
Message[] msgs = folder.getMessages();
for (int msgNum = 0; msgNum < msgs.length; msgNum++)
System.out.println(msgs[msgNum]);
catch (Exception ex)
ex.printStackTrace();
finally
// -- Close down nicely --
try
if (folder!=null) folder.close(false);
if (store!=null) store.close();
catch (Exception ex2) {ex2.printStackTrace();
} -
Urgent plz help in currency conversions
hi to all
wrbtr = sum of dmbtr
wrbtr = document currency
dmbtr = local currency
how can i match these
there is any function module to convert one to other.
plz help me in this issue
take example wrbtr = 20,000
sum of dmbtr =200
i am not understanding does i should use a fm or some other to make
wrbtr = sum of dmbtr
does the local currency and document currencies r same.
plz helpme
Message was edited by: kranthi reddyHi,
Local currency & document currencies need not be same, and that is the reason function modules are used ( Convert_to_local_currency & Convert_to_foreign_currency ) to convert the amount either to your Local or to Document currency, if they are same there is no need for conversions,
Can you elaborate on your query related to summing up the values as it is not clear,
Rgds,
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