MultiChat
Pertama, Siapkan aplikasi untuk menuliskan perintah coding.
Jika menggunakan Sistem Operasi Windows, anda bisa menggunakan Textpad /
Notepad kemudian akan di Compile/ Execute dengan Java.
Jika menggunakan Linux, anda bisa menggunakan Geany / Notepadqq kemuadian akan di Compile /Execute dengan Java.
Lalu Tulis Perintah Coding seperti ini:
Syntax yang pertama, ChatServer:
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 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) {
}
}
} 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);
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/Output Streams");
try {
sOutput = new ObjectOutputStream(socket.getOutputStream());
sInput = new ObjectInputStream(socket.getInputStream());
String message = (String) sInput.readObject();
username = message.split("~")[1];
System.out.println(username + " masuk.");
} catch (IOException e) {
System.out.println("Exception creating new Input/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 + " Exception reading 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;
}
}
}
Syntax, ChatClient:
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 = new ObjectInputStream(socket.getInputStream());
output = new ObjectOutputStream(socket.getOutputStream());
} catch (IOException eIO) {
System.out.println("Exception creating new Input/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 to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
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("Documents:fb.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(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
postTextFieldActionPerformed(evt);
}
});
kirimButton.setText("Kirim");
kirimButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
kirimButtonActionPerformed(evt);
}
});
jLabel2.setText("Server");
serverTextField.setText("10.17.0.0");
jLabel3.setText("Port");
portTextField.setText("9999");
masukButton.setText("Masuk");
masukButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
masukButtonActionPerformed(evt);
}
});
jLabel4.setText("Username");
usernameTextField.setText("4 CF");
javax.swing.GroupLayout layout = new javax.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 void masukButtonActionPerformed(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 void kirimButtonActionPerformed(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 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/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 + " 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) {
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));
}
}
}
Ouput:
