Multi client

MEMBUAT PROGRAM MULTICLIENT CHATTING CLIENT-SERVER

MENGGUNAKAN BAHASA PEMROGRAMAN JAVA BERBASIS

GRAFIS

Oleh :

AINI MAISI

(0611 3070 1291)

6CD

JURUSAN TEKNIK KOMPUTER

POLITEKNIK NEGERI SRIWIJAYA

PALEMBANG

MEMBUAT PROGRAM MULTICLIENT CHATTING CLIENT-SERVER

MENGGUNAKAN BAHASA PEMROGRAMAN JAVA BERBASIS

GRAFIS

Java merupakan suatu bahasa pemograman yang multi platform danmulti device. Java juga merupakan bahasa pemograman yang berorientasi objekdan program java tersusun dari bagian yang disebut kelas.

Dengan Chatting memungkinkan kita untuk selalu bisa berkomunikasiwalaupun kita tidak berada bersamanya di suatu tempat. Aplikasi chattingmerupakan suatu aplikasi yang memungkinkan pengguna (client)berkomunikasi teks secara langsung (Real Time) dengan pengguna lain denganmenggunakan media yang ada.

Pada bagian ini, saya akan membuat aplikasi chatting berbasis grafis (sepertitampilan foto) menggunakan bahasa pemograman java. pertama yang harusdilakukan adalah menyetting alamat IP pada masing-masing PC. Kita menggunakansatu server dan satu client.

Pertama yang harus dilakukan kita terlebih dahulu melakukan settingalamat IP pada masing-masing client. Setelah melakukan konfigurasi IP padamasing-masingi komputer kemudian kita juga harus memastikan bahwa firewallpada masing-masing komputer harus diaktifkan karena pada beberapa kasus programini tidak dapat saling terkoneksi akibat firewall yang aktif pada sistem operasinya.

Berikut adalah listing program MultiClient Chatting Client-Serverberbasis grafis (gambar)

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();

}

public void start() {

keepGoing = true;

try {

ServerSocket serverSocket = new ServerSocket(port);

while (keepGoing) {

System.out.println("ChatServer waiting for Clientson port " + port + ".");

Socket socket = serverSocket.accept();

if (!keepGoing) {

break;

}

ChatServer.ClientThread t = newChatServer.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) {

}

}

} catch (Exception e) {

System.out.println("Exception closing the serverand 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);

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;

this.socket = socket;

System.out.println("Menciptakan Object Input/OutputStreams");

try {

sOutput = newObjectOutputStream(socket.getOutputStream());

sInput = newObjectInputStream(socket.getInputStream());

String message = (String) sInput.readObject();

username = message.split("~")[1];

System.out.println(username + " masuk.");

} catch (IOException e) {

System.out.println("Exception creating newInput/output Streams: " + e);

} catch (ClassNotFoundException e) {

}

}

@Override

public void run() {

boolean keepGoing = true;

while (keepGoing) {

String message;

try {

message = sInput.readObject().toString();

} catch (IOException e) {

System.out.println(username + " Exceptionreading Streams: " + e);

break;

} catch (ClassNotFoundException e2) {

break;

}

String type = message.split("~")[0];

String pengirim = message.split("~")[1];

String text = message.split("~")[2];

String kepada = message.split("~")[3];

String response;

switch (type) {

case "postText":

response = "recieveText~" + pengirim + "~"+ text + "~" + kepada + "~\n";

send(response);

break;

case "postPrivateText":

response = "recievePrivateText~" +pengirim + "~" + text + "~" + kepada + "~\n";

send(response);

break;

case "login":

response = "login~" + pengirim + "~" +text + "~" + kepada + "~\n";

send(response);

break;

case "logout":

response = "logout~" + pengirim + "~" +text + "~" + kepada + "~\n";

send(response);

break;

case "list":

response = "list~server~" + getClients() +"~ ~ ~ ~ ~\n";

send(response);

break;

}

}

remove(id);

close();

}

private void close() {

try {

if (sOutput != null) {

sOutput.close();

}

} catch (Exception e) {

}

try {

if (sInput != null) {

sInput.close();

}

} catch (Exception e) {

}

try {

if (socket != null) {

socket.close();

}

} catch (Exception e) {

}

}

private boolean writeMsg(String msg) {

if (!socket.isConnected()) {

close();

return false;

}

try {

sOutput.writeObject(msg);

} catch (IOException e) {

System.out.println("Error sending message to " +username);

System.out.println(e.toString());

}

return true;

}

}

}

ChatClient.java

import java.io.IOException;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import java.net.Socket;

import java.util.ArrayList;

import java.util.List;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.swing.ImageIcon;

import javax.swing.JLabel;

import javax.swing.table.DefaultTableModel;

public class ChatClient extends javax.swing.JFrame {

/**

* Creates new form ChatClient

*/

private ObjectInputStream input;

private ObjectOutputStream output;

private Socket socket;

private String server, username;

private int port;

private List<String> clients;

public ChatClient() {

clients = new ArrayList();

initComponents();

}

public boolean start() {

try {

socket = new Socket(server, port);

} catch (Exception ec) {

System.out.println("Error connectiong to server:" +ec);

return false;

}

String msg = "Connection accepted " +socket.getInetAddress() + ":" + socket.getPort();

System.out.println(msg);

try {

input = newObjectInputStream(socket.getInputStream());

output = newObjectOutputStream(socket.getOutputStream());

} catch (IOException eIO) {

System.out.println("Exception creating newInput/output Streams: " + eIO);

return false;

}

new ChatClient.ListenFromServer().start();

try {

output.writeObject("login~" + username + "~" +username + " sedang login...~server~\n");

output.writeObject("list~" + username + "~" + username+ " sedang login...~server~\n");

} catch (IOException eIO) {

System.out.println("Exception doing login : " + eIO);

disconnect();

return false;

}

return true;

}

private void disconnect() {

try {

// TODO add your handling code here:

output.writeObject("logout~" + username + "~" +username + " sudah logout...~Server~\n");

} catch (IOException ex) {

//Logger.getLogger(ChatClient.class.getName()).log(Level.SEVERE,null, ex);

}

try {

if (input != null) {

input.close();

}

} catch (Exception e) {

}

try {

if (output != null) {

output.close();

}

} catch (Exception e) {

}

try {

if (socket != null) {

socket.close();

}

} catch (Exception e) {

}

}

/**

* This method is called from within the constructor toinitialize the form.

* WARNING: Do NOT modify this code. The content of thismethod is always

* regenerated by the Form Editor.

*/

@SuppressWarnings("unchecked")

// <editor-fold defaultstate="collapsed" desc="GeneratedCode">

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(newImageIcon("E:/rara.jpg"));

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(newjava.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEventevt) {

postTextFieldActionPerformed(evt);

}

});

kirimButton.setText("Kirim");

kirimButton.addActionListener(newjava.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEventevt) {

kirimButtonActionPerformed(evt);

}

});

jLabel2.setText("Server");

serverTextField.setText("10.17.0.0");

jLabel3.setText("Port");

portTextField.setText("9999");

masukButton.setText("Masuk");

masukButton.addActionListener(newjava.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEventevt) {

masukButtonActionPerformed(evt);

}

});

jLabel4.setText("Username");

usernameTextField.setText("Rara Ariesta");

javax.swing.GroupLayout layout = newjavax.swing.GroupLayout(getContentPane());

getContentPane().setLayout(layout);

layout.setHorizontalGroup(

layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(layout.createSequentialGroup()

.addContainerGap()

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(layout.createSequentialGroup()

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()

.addComponent(postTextField)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(kirimButton))

.addComponent(jScrollPane1))

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(jScrollPane2,javax.swing.GroupLayout.PREFERRED_SIZE, 259,javax.swing.GroupLayout.PREFERRED_SIZE))

.addGroup(layout.createSequentialGroup()

.addComponent(lbljpg)

.addComponent(jLabel2)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(serverTextField,javax.swing.GroupLayout.PREFERRED_SIZE, 167,javax.swing.GroupLayout.PREFERRED_SIZE)

.addGap(18, 18, 18)

.addComponent(jLabel3)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(portTextField,javax.swing.GroupLayout.PREFERRED_SIZE, 46,javax.swing.GroupLayout.PREFERRED_SIZE)

.addGap(18, 18, 18)

.addComponent(jLabel4)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(usernameTextField,javax.swing.GroupLayout.DEFAULT_SIZE, 194, Short.MAX_VALUE)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addComponent(masukButton)))

.addContainerGap())

);

layout.setVerticalGroup(

layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()

.addContainerGap()

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)

.addComponent(lbljpg)

.addComponent(jLabel2)

.addComponent(serverTextField,javax.swing.GroupLayout.PREFERRED_SIZE,javax.swing.GroupLayout.DEFAULT_SIZE,javax.swing.GroupLayout.PREFERRED_SIZE)

.addComponent(jLabel3)

.addComponent(portTextField,javax.swing.GroupLayout.PREFERRED_SIZE,javax.swing.GroupLayout.DEFAULT_SIZE,javax.swing.GroupLayout.PREFERRED_SIZE)

.addComponent(masukButton)

.addComponent(jLabel4)

.addComponent(usernameTextField,javax.swing.GroupLayout.PREFERRED_SIZE,javax.swing.GroupLayout.DEFAULT_SIZE,javax.swing.GroupLayout.PREFERRED_SIZE))

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)

.addComponent(jScrollPane2,javax.swing.GroupLayout.Alignment.TRAILING,javax.swing.GroupLayout.DEFAULT_SIZE, 427, Short.MAX_VALUE)

.addGroup(layout.createSequentialGroup()

.addComponent(jScrollPane1)

.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)

.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)

.addComponent(postTextField,javax.swing.GroupLayout.PREFERRED_SIZE,javax.swing.GroupLayout.DEFAULT_SIZE,javax.swing.GroupLayout.PREFERRED_SIZE)

.addComponent(kirimButton))))

.addContainerGap())

);

pack();

}// </editor-fold>

private voidmasukButtonActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:

this.server = serverTextField.getText();

this.port = new Integer(portTextField.getText());

this.username = usernameTextField.getText();

start();

}

private voidkirimButtonActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:

try {

String message = "postText~" + username + "~" +postTextField.getText() + "~all~\n";

output.writeObject(message);

postTextField.setText("");

} catch (IOException ex) {

Logger.getLogger(ChatClient.class.getName()).log(Level.SEVERE,null, ex);

}

}

private voidpostTextFieldActionPerformed(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 andfeel setting code (optional) ">

/* If Nimbus (introduced in Java SE 6) is not available,stay with the default look and feel.

* For details seehttp://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html

*/

try {

for (javax.swing.UIManager.LookAndFeelInfo info :javax.swing.UIManager.getInstalledLookAndFeels()) {

if ("Nimbus".equals(info.getName())) {

javax.swing.UIManager.setLookAndFeel(info.getClassName());

break;

}

}

} 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

private javax.swing.JTable clientTable;

private javax.swing.JLabel jLabel2;

private javax.swing.JLabel jLabel3;

private javax.swing.JLabel jLabel4;

private javax.swing.JScrollPane jScrollPane1;

private javax.swing.JScrollPane jScrollPane2;

private javax.swing.JButton kirimButton;

private javax.swing.JButton masukButton;

private javax.swing.JTextField portTextField;

private javax.swing.JTextField postTextField;

private javax.swing.JTextField serverTextField;

private javax.swing.JTextField usernameTextField;

private javax.swing.JTextArea viewTextArea;

private JLabel lbljpg ;

// End of variables declaration

class ListenFromServer extends Thread {

@Override

public void run() {

while (true) {

try {

String msg = (String) input.readObject();

String res;

String type = msg.split("~")[0];

String pengirim = msg.split("~")[1];

String text = msg.split("~")[2];

String kepada = msg.split("~")[3];

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 + " sudahlogin..." + "\n");

clients.add(pengirim);

break;

case "logout":

viewTextArea.setText(viewTextArea.getText() + pengirim + " telahlogout..." + "\n");

clients.remove(pengirim);

break;

case "list":

setTable(text);

break;

}

} catch (IOException e) {

System.out.println("Server has close theconnection: " + 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));

}

}

}

Pastikan kita sudah terhubung ke internet. Lalu eksekusi programmenggunakan ctrl+1 dan ctrl+2, maka tampilan akan seperti berikut: