Cara Membuat Chat Aplication

untuk server

Code:

ServerSocket serverSocket = new ServerSocket(port);
Socket socket = serverSocket.accept();
BufferedWriter writer = new BufferedWriter(new StreamWriter(socket.getOutputStream()));
writer.write("Hello, how are you?");
writer.flush();

ini untuk clien

Code:

Socket socket = new Socket("192.168.1.xxx", port);
BufferedReader reader = new BufferedReader(new StreamReader(socket.getInputStream()));
String message = reader.readLine();
System.out.println(message);

port = di isi dengan port yang sesuai dengan setingan port server
contoh = "new ServerScocket(9090);"
192.168.1.xxx bisa di rubah dengan tujuan ke IP server
base dari chat di Java Program (dekstop aplication)
semoga bermanfaat Ayo berkembang Programer JAVA

Love Koiwai

bagi yang LV medium mungkin anda bisa menggunakan metode ini

Server
Server.java

Code:

import java.net.*;
import java.io.*;
import java.util.*;
public class Server{
   private ServerSocket ss;
   private Socket socket;
   Map<Socket,DataOutputStream> map=new HashMap<Socket,DataOutputStream>();
      public static void main(String[] args)
      {
           try
           {
                int port=Integer.parseInt(args[0]);
    new Server(port);
           }
          catch(NumberFormatException nfe)
           {
    System.out.println("Usage:> java Server <portno(int)>");
    return;
           }
          catch(ArrayIndexOutOfBoundsException aioobe)
          {
                System.out.println("Usage:> java Server <portno(int)>");
    return;
          }   
      }
      public Server(int port)
      {
          try{
    listen(port);
                }
          catch(IOException ioe)
          {
                ioe.printStackTrace();
          }
      }
      private  void listen(int port) throws IOException{
         ss=new ServerSocket(port);
         System.out.println("Server started");
         while(true)
               {
                   socket=ss.accept();
                   System.out.println("connected "+socket);
                   DataOutputStream dout=new DataOutputStream(socket.getOutputStream());
                   map.put(socket,dout);
                   new ServerThread(this,socket);
               }
      }
     public void sendToAll(String message,Socket cur_soc)
     {
            synchronized(map){
    Set<Socket> socket_set=map.keySet();
    Iterator<Socket> itr=socket_set.iterator();
    while(itr.hasNext())
    {
      try{
                Socket s=itr.next();
                if(s!=cur_soc)
                 { 
                    DataOutputStream dout=map.get(s);
                    dout.writeUTF(message);
                 }
            }
     catch(IOException ioe){}
    }
            }  
     }  
     public void removeConnection(Socket soc)
     {
         synchronized(map)
          {
             map.remove(soc);
             System.out.println("removed "+soc);
             try
               {
                  soc.close(); 
               }
             catch(IOException e)
             {
             }
         }
     }  
}

ServerThread.java

Code:

import java.net.*;
import java.io.*;
public class ServerThread extends Thread{
    private Server server;
    private Socket socket;
        public ServerThread(Server server,Socket socket)
        {
            this.server=server;
    this.socket=socket;
    start();
        }
       public void run()
       {
           try{
        DataInputStream din=new DataInputStream(socket.getInputStream());
    while(true)
    {
         String message=din.readUTF();
         server.sendToAll(message,socket);
    }
                }
           catch(EOFException eof){}
           catch(IOException ioe){}
           finally{
                 server.removeConnection(socket);
           }   
       }
}

client.java

Code:

import java.net.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;

public class Client1 extends javax.swing.JFrame implements Runnable {


    /** Creates new form Client1 */
    public Client1() {
        initComponents();
        registerComponents();
    }
   public void run(){
         try
           {
               while(true)
    {
         String msg=din.readUTF();
         jconv_area.append(msg+"\n");   
    }       
           }
         catch(IOException ioe){
    System.out.println("IOError");
         }
    }
   private void registerComponents(){
        jlogin_btn.addActionListener(new ActionListener(){
    public void actionPerformed(ActionEvent ae){
          if(jlogin_field.getText().equals(""))
        juser_info.setText("Please specify Name");
          else{
                    try{
            addr=new InetSocketAddress(InetAddress.getLocalHost().getHostName(),5000);
            //wait while connection establishes
                setCursor(java.awt.Cursor.getPredefinedCursor(java.awt.Cursor.WAIT_CURSOR))​;
            socket.connect(addr);
            din=new DataInputStream(socket.getInputStream());
            dout=new DataOutputStream(socket.getOutputStream());
            new Thread(Client1.this).start();
           }
                    catch(UnknownHostException uhe){
             JOptionPane.showMessageDialog(Client1.this,"Unknown Host!!!","Global-Chat",JOptionPane.INFORMATION_MESSAGE);
             return;
                     } 
                    catch(IOException ioe){
             JOptionPane.showMessageDialog(Client1.this,"Connection refused!!!","Global-Chat",JOptionPane.INFORMATION_MESSAGE);
             return;
                     } 
                   finally{
             setCursor(java.awt.Cursor.getDefaultCursor());         
                   }   

        login_name=jlogin_field.getText();
        juser_info.setText("Welcome "+login_name);
        jlogin_btn.setEnabled(false);
        jlogin_field.setEnabled(false);
        jmsg_area.setEnabled(true);
                       jsend.setEnabled(true);
        jdisconnect.setEnabled(true);
                  }
    }
        });

       jdisconnect.addActionListener(new ActionListener(){
                public void actionPerformed(ActionEvent ae){

                    if(ae.getActionCommand().equals("Really???"))
         try{
                 socket.close();
                 Client1.this.setVisible(false);
                 System.exit(0);       
               }
         catch(IOException ioe){}

     if(ae.getActionCommand().equals("Disconnect"))
                 jdisconnect.setText("Really???");
     }
      });

     jmsg_area.addKeyListener(new KeyAdapter(){
              public void keyPressed(KeyEvent ke){
                 try{
       if(ke.getKeyCode()==KeyEvent.VK_ENTER){
              write();
       }
                  } 
                  catch(IOException ioe){}
              }
    });

   jsend.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent ae){
    try{
           write();
          }
    catch(IOException ioe){}
    }
  });
}
   private void write() throws IOException{
         if(jdisconnect.getText().equals("Really???"))
     jdisconnect.setText("Disconnect");
         String msg=jmsg_area.getText().trim();
         System.out.print(msg);
         dout.writeUTF(login_name+":"+msg); 
         jconv_area.append("You:"+msg+"\n");    
         jmsg_area.setText("");
         jmsg_area.moveCaretPosition(0);   

   }

    /** 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">//GEN-BEGIN:initComponents
    private void initComponents() {

        String look="com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
    try{
                           UIManager.setLookAndFeel(look);
                          SwingUtilities.updateComponentTreeUI(this);
         }
    catch(Exception e){}

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        jPanel2 = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        jconv_area = new javax.swing.JTextArea();
        jPanel3 = new javax.swing.JPanel();
        jLabel6 = new javax.swing.JLabel();
        jlogin_field = new javax.swing.JTextField();
        jlogin_btn = new javax.swing.JButton();
        juser_info = new javax.swing.JLabel();
        jScrollPane2 = new javax.swing.JScrollPane();
        jmsg_area = new javax.swing.JTextArea();
        jmsg_area.setEnabled(false);

        jdisconnect = new javax.swing.JButton();
        jdisconnect.setEnabled(false);

        jsend = new javax.swing.JButton();
        jsend.setEnabled(false);

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Global-Chat");
        setResizable(false);

        jLabel1.setFont(new java.awt.Font("Kristen ITC", 1, 36)); // NOI18N
        jLabel1.setForeground(new java.awt.Color(255, 51, 102));
        jLabel1.setText("G");
        jPanel1.add(jLabel1);

        jLabel2.setFont(new java.awt.Font("Kristen ITC", 1, 36)); // NOI18N
        jLabel2.setForeground(new java.awt.Color(11, 187, 59));
        jLabel2.setText("LO");
        jPanel1.add(jLabel2);

        jLabel3.setFont(new java.awt.Font("Kristen ITC", 1, 36)); // NOI18N
        jLabel3.setForeground(new java.awt.Color(50, 8, 241));
        jLabel3.setText("BA");
        jPanel1.add(jLabel3);

        jLabel4.setFont(new java.awt.Font("Kristen ITC", 1, 36)); // NOI18N
        jLabel4.setForeground(new java.awt.Color(249, 11, 237));
        jLabel4.setText("L");
        jPanel1.add(jLabel4);

        jLabel5.setFont(new java.awt.Font("Tempus Sans ITC", 1, 24)); // NOI18N
        jLabel5.setForeground(java.awt.Color.orange);
        jLabel5.setText("C H A T");
        jPanel1.add(jLabel5);

        jconv_area.setColumns(20);
        jconv_area.setEditable(false);
        jconv_area.setFont(new java.awt.Font("Monospaced", 0, 14)); // NOI18N
        jconv_area.setForeground(new java.awt.Color(255, 102, 102));
        jconv_area.setRows(5);
        jScrollPane1.setViewportView(jconv_area);

        jPanel3.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));

        jLabel6.setFont(new java.awt.Font("Times New Roman", 0, 14)); // NOI18N
        jLabel6.setText("Login Name");

        jlogin_btn.setText("Login");

        juser_info.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        juser_info.setText("Login to Chat");

        javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
        jPanel3.setLayout(jPanel3Layout);
        jPanel3Layout.setHorizontalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING​)
            .addGroup(jPanel3Layout.createSequentialGroup()
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignme​nt.LEADING)
                    .addGroup(jPanel3Layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jLabel6, javax.swing.GroupLayout.PREFERRED_SIZE, 69, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(8, 8, 8)
                        .addComponent(jlogin_field, javax.swing.GroupLayout.DEFAULT_SIZE, 96, Short.MAX_VALUE))
                    .addGroup(jPanel3Layout.createSequentialGroup()
                        .addGap(54, 54, 54)
                        .addComponent(jlogin_btn))
                    .addComponent(juser_info, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, 183, Short.MAX_VALUE))
                .addContainerGap())
        );
        jPanel3Layout.setVerticalGroup(
            jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING​)
            .addGroup(jPanel3Layout.createSequentialGroup()
                .addGap(37, 37, 37)
                .addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignme​nt.BASELINE)
                    .addComponent(jlogin_field, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel6))
                .addGap(18, 18, 18)
                .addComponent(jlogin_btn)
                .addGap(26, 26, 26)
                .addComponent(juser_info)
                .addContainerGap(234, Short.MAX_VALUE))
        );

        jmsg_area.setColumns(20);
        jmsg_area.setFont(new java.awt.Font("Times New Roman", 0, 14)); // NOI18N
        jmsg_area.setForeground(new java.awt.Color(6, 123, 252));
        jmsg_area.setLineWrap(true);
        jmsg_area.setRows(5);
        jmsg_area.setWrapStyleWord(true);
        jmsg_area.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
        jmsg_area.setMargin(new java.awt.Insets(5, 10, 2, 2));
        jScrollPane2.setViewportView(jmsg_area);

        jdisconnect.setText("Disconnect");

        jsend.setText("Send");

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING​)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignme​nt.LEADING)
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 409, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addComponent(jdisconnect)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 444, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jsend, javax.swing.GroupLayout.DEFAULT_SIZE, 73, Short.MAX_VALUE)))
                .addContainerGap())
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING​)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignme​nt.TRAILING, false)
                    .addComponent(jPanel3, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 366, Short.MAX_VALUE))
                .addGap(20, 20, 20)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignme​nt.TRAILING, false)
                    .addComponent(jsend, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jdisconnect, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAI​LING)
                    .addComponent(jPanel2, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jPanel1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 624, Short.MAX_VALUE))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, 490, Short.MAX_VALUE)
                .addContainerGap())
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Client1().setVisible(true);
            }
        });
    }



    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JTextArea jconv_area;
    private javax.swing.JButton jdisconnect;
    private javax.swing.JButton jlogin_btn;
    private javax.swing.JTextField jlogin_field;
    private javax.swing.JTextArea jmsg_area;
    private javax.swing.JButton jsend;
    private javax.swing.JLabel juser_info;

    private Socket socket=new Socket();
    private InetSocketAddress addr;
    private String login_name;
    private DataInputStream din;
    private DataOutputStream dout;



    // End of variables declaration//GEN-END:variables

}