1. TUGAS
Membuat Program MultiClient Chatting Client-Server
Menggunakan Bahasa Pemrograman Java Berbasis Grafis
Oleh :
M. Ichsan Barokah
061130701305
6CD
JURUSAN TEKNIK KOMPUTER
POLITEKNIK NEGERI SRIWIJAYA
PALEMBANG
2. Chatting memungkinkan kita untuk selalu bisa berkomunikasi
walaupun kita tidak berada bersamanya di suatu tempat. Aplikasi chatting
merupakan suatu aplikasi yang memungkinkan pengguna (client)
berkomunikasi teks secara langsung (Real Time) dengan pengguna lain dengan
menggunakan media yang ada.
Hal yang harus dilakukan kita terlebih dahulu untuk menjalankan program
chatting ialah melakukan setting alamat IP pada masing-masing client.
Setelah melakukan konfigurasi IP pada masing-masingikomputer
kemudian kita juga harus memastikan bahwa firewall pada masing-masing
komputer harus diaktifkan karena pada beberapa kasus program ini tidak dapat saling
terkoneksi akibat firewall yang aktif pada sistem operasinya.
Berikut adalah listing program MultiClient Chatting Client-Server berbasis
grafis
ChatServer.java
import java.io.*;
import java.net.*;
import java.util.*;
public class ChatServer {
private static int uniqueId;
private ArrayList<ChatServer.ClientThread> clients;
private int port;
private boolean keepGoing;
public ChatServer() {
this.port = 9999;
clients = new ArrayList();
}
3. public void start() {
keepGoing = true;
try {
ServerSocket serverSocket = new ServerSocket(port);
while (keepGoing) {
System.out.println("ChatServer waiting for Clients
on port " + port + ".");
Socket socket = serverSocket.accept();
if (!keepGoing) {
break;
}
ChatServer.ClientThread t = new
ChatServer.ClientThread(socket);
clients.add(t);
t.start();
send("login~" + t.username + "~" + t.username + "
sedang login...~Server~n");
}
try {
serverSocket.close();
for (int i = 0; i < clients.size(); ++i) {
ChatServer.ClientThread tc = clients.get(i);
try {
tc.sInput.close();
tc.sOutput.close();
tc.socket.close();
} catch (IOException ioE) {
}
}
4. } catch (Exception e) {
System.out.println("Exception closing the server
and clients: " + e);
}
} catch (IOException e) {
String msg = "Exception on new ServerSocket: " + e +
"n";
System.out.println(msg);
}
}
private synchronized void send(String message) {
for (int i = clients.size(); --i >= 0;) {
ChatServer.ClientThread ct = clients.get(i);
if (!ct.writeMsg(message)) {
clients.remove(i);
System.out.println("Disconnected Client " +
ct.username + " removed from list.");
}
}
}
private String getClients() {
String s = "";
for (ClientThread clientThread : clients) {
s += clientThread.username + ":";
}
s += "---";
System.out.println(s);
5. return s;
}
private synchronized void remove(int id) {
for (int i = 0; i < clients.size(); ++i) {
ChatServer.ClientThread ct = clients.get(i);
if (ct.id == id) {
clients.remove(i);
return;
}
}
}
public static void main(String[] args) {
ChatServer server = new ChatServer();
server.start();
}
private class ClientThread extends Thread {
private Socket socket;
private ObjectInputStream sInput;
private ObjectOutputStream sOutput;
private int id;
private String username;
public ClientThread(Socket socket) {
id = ++uniqueId;
13. } catch (Exception e) {
}
try {
if (socket != null) {
socket.close();
}
} catch (Exception e) {
}
}
/**
* This method is called from within the constructor to
initialize the form.
* WARNING: Do NOT modify this code. The content of this
method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated
Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
viewTextArea = new javax.swing.JTextArea();
jScrollPane2 = new javax.swing.JScrollPane();
clientTable = new javax.swing.JTable();
postTextField = new javax.swing.JTextField();
kirimButton = new javax.swing.JButton();
lbljpg = new javax.swing.JLabel(new
ImageIcon("E:/rara.jpg"));
14. jLabel2 = new javax.swing.JLabel();
serverTextField = new javax.swing.JTextField();
jLabel3 = new javax.swing.JLabel();
portTextField = new javax.swing.JTextField();
masukButton = new javax.swing.JButton();
jLabel4 = new javax.swing.JLabel();
usernameTextField = new javax.swing.JTextField();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE
);
viewTextArea.setEditable(false);
viewTextArea.setColumns(20);
viewTextArea.setLineWrap(true);
viewTextArea.setRows(5);
viewTextArea.setFocusable(false);
jScrollPane1.setViewportView(viewTextArea);
jScrollPane2.setViewportView(clientTable);
postTextField.addActionListener(new
java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent
evt) {
postTextFieldActionPerformed(evt);
}
});
kirimButton.setText("Kirim");
20. Logger.getLogger(ChatClient.class.getName()).log(Level.SEVERE,
null, ex);
}
}
private void
postTextFieldActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
kirimButtonActionPerformed(evt);
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and
feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available,
stay with the default look and feel.
* For details see
http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/pla
f.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info :
javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
21. }
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(ChatClient.class.getName()).log
(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(ChatClient.class.getName()).log
(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(ChatClient.class.getName()).log
(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(ChatClient.class.getName()).log
(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new ChatClient().setVisible(true);
}
});
}
// Variables declaration - do not modify
23. switch (type) {
case "recieveText":
res = pengirim + ": " + text;
viewTextArea.setText(viewTextArea.getText() + res + "n");
break;
case "recievePrivateText":
res = pengirim + ": " + text;
if (kepada.equals(username)) {
viewTextArea.setText(viewTextArea.getText() + res + "n");
}
break;
case "login":
viewTextArea.setText(viewTextArea.getText() + pengirim + " sudah
login..." + "n");
clients.add(pengirim);
break;
case "logout":
viewTextArea.setText(viewTextArea.getText() + pengirim + " telah
logout..." + "n");
clients.remove(pengirim);
break;
case "list":
setTable(text);
break;
}
} catch (IOException e) {
24. System.out.println("Server has close the
connection: " + e);
break;
} catch (ClassNotFoundException e2) {
}
}
}
private void setTable(String text) {
int rows = text.split(":").length - 1;
Object[][] data = new Object[rows][1];
for (int i = 0; i < rows; i++) {
String t = text.split(":")[i];
data[i][0] = t;
}
String[] header = {"Clients"};
clientTable.setModel(new DefaultTableModel(data,
header));
}
}
}
Jika dijalankan maka tampilan akan seperti berikut: