Final implementation, ready for presentation!

src/backend/ChatClientCMD.java

@@ -1,4 +1,4 @@
-package javaChat;
+package backend;
 
 import java.net.* ;
 
@@ -6,7 +6,7 @@ import javax.swing.JFrame ;
 
 import java.io.* ;
 
-public class ChatClient
+public class ChatClientCMD
     {
 
     /**

src/backend/ChatServer.java

@@ -0,0 +1,309 @@
+
+package backend ;
+
+import java.io.DataInputStream ;
+import java.io.DataOutputStream ;
+import java.io.IOException ;
+import java.net.ServerSocket ;
+import java.net.Socket ;
+import java.util.ArrayList ;
+
+/**
+ * ChatServer class accepts Client requests to join 
+ * and creates an individual thread for each client.
+ * The "brain" of the server.
+ *
+ * @author osheas1
+ * @author gohringj
+ * @version Semi-Final Draft
+ */
+public class ChatServer
+    {
+
+    // List of all active users in Server
+    public static ArrayList<ClientHandler> userList = new ArrayList<>() ;
+
+    
+    /**
+     * @param args (unused)
+     * @throws IOException (is thrown if connection is unexpectedly closed)
+     */
+    public static void main( final String[] args ) throws IOException
+        {
+        // Register service on port 6789
+        ServerSocket serverSocket = new ServerSocket( 6789 ) ;
+        Socket socket = null ;
+
+        System.out.println( "\nServer established. Awaiting connections..." ) ;
+
+        // Loop to accept client requests
+        while ( true )
+            {
+            socket = serverSocket.accept() ;
+
+            DataOutputStream dataStreamOut = new DataOutputStream( socket.getOutputStream() ) ;
+            DataInputStream dataStreamIn = new DataInputStream( socket.getInputStream() ) ;
+
+            System.out.println( "\nClient connection detected, requesting username..." ) ;
+            String username = dataStreamIn.readUTF() ;
+
+            ClientHandler handle = new ClientHandler( socket, username, dataStreamOut, dataStreamIn ) ;
+
+            System.out.println( "\nCreating new thread...\n" ) ;
+            Thread thread = new Thread( handle ) ;
+
+            userList.add( handle ) ;
+
+            thread.start() ;
+            }
+        }   
+    } // end class ChatServer
+
+
+
+
+/**
+ * ClientHandler class manages the actual messages being sent
+ * between the users. The "heart" of the server.
+ *
+ * @author osheas1
+ * @author gohringj
+ * @version Semi-Final Draft
+ */
+
+class ClientHandler implements Runnable
+    {
+    Socket socket ;
+    String username ;
+    DataOutputStream dataStreamOut ;
+    DataInputStream dataStreamIn ;
+    boolean loggedIn ;
+    int commandCheck ;
+
+    /**
+     * Constructor
+     * @param s = client socket
+     * @param user = client's user-name
+     * @param dos = data stream to client
+     * @param dis = data stream from client
+     */
+    public ClientHandler( Socket s, String user, DataOutputStream dos, DataInputStream dis )
+        {
+        this.socket = s ;
+        this.username = user ;
+        this.dataStreamOut = dos ;
+        this.dataStreamIn = dis ;
+        this.loggedIn = true ;
+        }
+
+
+    @Override
+    public void run()
+        {
+        // Note the connection of the new user
+        String announcement = String.format( "\n>>> User \"%s\" has successfully connected (type /help for a list of commands) <<<\n", this.username ) ;
+        System.out.println( announcement ) ;
+
+        // Distribute announcement to entire server
+        sendMessage( announcement ) ;
+
+        // Message management
+        String message = "" ;
+        while ( true )
+            {          
+            // Try-Catch block interprets incoming messages 
+            try
+                {
+                message = this.dataStreamIn.readUTF() ;
+                
+                if(message == "" || message == " ")
+                    {
+                    continue ;
+                    }
+                }
+            catch ( IOException x )
+                {
+                x.printStackTrace() ;
+                }
+
+            // Check message for user commands, returns TRUE if user "/quit"s
+            if( commands( message, this ) )
+                {
+                break ;
+                }
+           
+            // Print the message server-side
+            message = String.format( "%s: %s", this.username, message ) ;
+            System.out.println( message ) ;
+
+            // Distribute the message to all users
+            if ( this.commandCheck == 0 )
+                {
+                sendMessage( message ) ;
+                }
+            else
+                {
+                this.commandCheck = 0 ;
+                }                                  
+            } // end while
+
+        // close streams when user disconnects
+        try
+            {
+            this.loggedIn = false ;
+            this.dataStreamIn.close() ;
+            this.dataStreamOut.close() ;
+            this.socket.close() ;
+            }
+        catch ( IOException x )
+            {
+            x.printStackTrace() ;
+            }
+        } // end run
+
+
+    /**
+     * The 'commands' method manages the usage of user-commands
+     * by distributing private messages, providing a user-list,
+     * etc.
+     *
+     * @param message = the command itself
+     * @param user = the user that 
+     * @return = boolean that indicates that the user has disconnected
+     */
+    public boolean commands( String message, final ClientHandler user )
+        {
+        final String[] commands = new String[] { "/help", "/quit", "/userlist", "/pm" } ;
+
+        try
+            {
+            // Quit command terminates client's connection, with an announcement
+            if ( message.equals( "/quit" ) )
+                {
+                this.commandCheck++ ;
+                String announcement = String.format( "\n-= \"%s\" has disconnected =- \n", user.username ) ;
+                System.out.println( announcement ) ;
+                sendMessage( announcement ) ;
+                return true ;
+                }
+
+            // User-List command provides the user a list of everyone else connected to the server
+            if ( message.equals( "/userlist" ) )
+                {
+                this.commandCheck++ ;
+                user.dataStreamOut.writeUTF( "> Current list of users in the server: " ) ;
+                for ( ClientHandler users : ChatServer.userList )
+                    {
+                    if ( !users.loggedIn )
+                        {
+                        continue ;
+                        }
+
+                    user.dataStreamOut.writeUTF( "> " + users.username ) ;
+                    }
+                }
+
+            // Help command lists all available commands
+            if ( message.equals( "/help" ) )
+                {
+                this.commandCheck++ ;
+                user.dataStreamOut.writeUTF( "\n> All available commands: " ) ;
+                for ( String command : commands )
+                    {
+                    user.dataStreamOut.writeUTF( "> " +command ) ;
+                    }
+
+                user.dataStreamOut.writeUTF( "\n" ) ;
+                }
+
+            // Private Message Command allows users to send messages to a single recipient
+            if ( message.contains( "/pm" ) )
+                {
+                this.commandCheck++ ;
+                user.dataStreamOut.writeUTF( "\n> Who would you like to private message?" ) ;
+                String recipient = this.dataStreamIn.readUTF() ;
+                user.dataStreamOut.writeUTF( "> \"" + recipient + "\"" ) ;
+
+                ClientHandler sendTo = null ;
+
+                // loop determines which ClientHandler object to send the message to
+                for ( ClientHandler users : ChatServer.userList )
+                    { 
+                    if ( !users.loggedIn )
+                        {
+                        continue ;
+                        }
+                    else if ( users.username.equals( recipient ) )
+                        {
+                        sendTo = users ;
+                        }
+                    }
+                
+                if ( sendTo == null )
+                    {
+                    user.dataStreamOut.writeUTF( "\n> User not found, please try again" ) ;
+                    return false ;
+                    }
+
+                user.dataStreamOut.writeUTF( "\n> What would you like to say?" ) ;
+                String privateMessage = this.dataStreamIn.readUTF() ;
+                user.dataStreamOut.writeUTF( "> sent: \"" + privateMessage + "\"" ) ;
+                sendPrivateMessage( privateMessage, user.username, sendTo ) ;
+                    
+                }
+            }
+
+        catch ( IOException x )
+            {
+            while ( ChatServer.userList.size() != 0 )
+                {
+                System.out.println( x ) ;
+                }
+            }
+
+        return false ;
+        } // end commands
+
+
+    // Convenience method to send messages privately
+    private static void sendPrivateMessage( String message, final String sentfrom, final ClientHandler sendto )
+        {
+        try
+            {
+            for ( ClientHandler users : ChatServer.userList )
+                {
+                if ( users.equals( sendto ) )
+                    {
+                    message = String.format( "\nFrom <%s>: %s", sentfrom, message ) ;
+                    users.dataStreamOut.writeUTF( message ) ;
+                    }
+                }
+            }
+        catch ( final IOException x )
+            {
+            x.printStackTrace() ;
+            }
+        }
+
+
+    // Convenience method to distribute messages to all clients
+    private static void sendMessage( String message )
+        {
+        try
+            {
+            for ( ClientHandler users : ChatServer.userList )
+                {
+                if ( !users.loggedIn )
+                    {
+                    continue ;
+                    }
+                users.dataStreamOut.writeUTF( message ) ;
+                }
+            }
+        catch ( IOException x )
+            {
+            x.printStackTrace() ;
+            }
+        }
+    }
+// end class ClientHandler

src/chatApp/ChatGUI.java

@@ -0,0 +1,167 @@
+
+package chatApp ;
+
+@SuppressWarnings( "javadoc" )
+public class ChatGUI extends javax.swing.JFrame {
+
+    public boolean messageReady = false ;
+    public String message ;
+    public String username ;
+    /*
+    public void giveTitle(String name)
+        {
+        this.username = name ;
+        setTitle("logged in as:" + name ) ;
+        }
+    */
+    public String getMessageOut()
+        {
+        if( this.message.contentEquals( "" ) || this.message.contentEquals( " " ) )
+            {
+            this.messageReady = false ;
+            return null ;
+            }
+        if( this.messageReady )
+            {
+            this.messageReady = false ;
+            return this.message ;
+            }
+        return null ;
+        }
+    
+    
+    public void printMessage( String messageOut )
+        {
+        messageOut = String.format( "%s\n%s", this.jTextArea1.getText(), messageOut ) ; 
+        this.jTextArea1.setText( null ) ;
+        this.jTextArea1.setText( messageOut ) ;
+        jTextArea1.moveCaretPosition( jTextArea1.getDocument().getLength() );
+        }
+    
+
+    public ChatGUI() {
+        initComponents();
+    }
+    
+
+    @SuppressWarnings("unchecked")
+    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
+    private void initComponents() {
+
+    jTextField1 = new javax.swing.JTextField();
+    jButton1 = new javax.swing.JButton();
+    jScrollPane2 = new javax.swing.JScrollPane();
+    jTextArea1 = new javax.swing.JTextArea();
+
+    setDefaultCloseOperation(javax.swing.WindowConstants.HIDE_ON_CLOSE);
+    setTitle("logged in as: " + this.username );
+
+    jButton1.setText("send");
+    jButton1.addActionListener(new java.awt.event.ActionListener() {
+        public void actionPerformed(java.awt.event.ActionEvent evt) {
+            jButton1ActionPerformed(evt);
+        }
+    });
+    
+    jTextField1.addActionListener(new java.awt.event.ActionListener() {
+    public void actionPerformed(java.awt.event.ActionEvent evt) {
+        jTextField1ActionPerformed(evt);
+    }
+    });
+
+    setResizable(false);
+    jTextArea1.setEditable(false);
+    jTextArea1.setColumns(20);
+    jTextArea1.setRows(5);
+    jTextArea1.setWrapStyleWord(true);
+    jTextArea1.setLineWrap( true );
+    jTextArea1.moveCaretPosition( jTextArea1.getDocument().getLength() );
+    jScrollPane2.setViewportView(jTextArea1);
+
+    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(50, Short.MAX_VALUE)
+            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
+                .addComponent(jScrollPane2)
+                .addGroup(layout.createSequentialGroup()
+                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 610, javax.swing.GroupLayout.PREFERRED_SIZE)
+                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
+                    .addComponent(jButton1)))
+            .addGap(50, 50, 50))
+    );
+    layout.setVerticalGroup(
+        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+        .addGroup(layout.createSequentialGroup()
+            .addContainerGap(50, Short.MAX_VALUE)
+            .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 311, javax.swing.GroupLayout.PREFERRED_SIZE)
+            .addGap(18, 18, 18)
+            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
+                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
+                .addComponent(jButton1))
+            .addGap(50, 50, 50))
+    );
+
+    pack();
+    setLocationRelativeTo(null);
+    }// </editor-fold>                        
+
+    private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) 
+        {                                                
+        if( this.jTextField1.getText() != null )
+            {
+            this.message = this.jTextField1.getText() ;
+            this.messageReady = true ; 
+            this.jTextField1.setText( null ) ;
+            }
+        }  
+    
+    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
+
+    if( this.jTextField1.getText() != null )
+        {
+        this.message = this.jTextField1.getText() ;
+        this.messageReady = true ; 
+        this.jTextField1.setText( null ) ;
+        }
+        
+    }    
+    
+
+    public static void main(String args[]) {
+
+        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(ChatGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (InstantiationException ex) {
+            java.util.logging.Logger.getLogger(ChatGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (IllegalAccessException ex) {
+            java.util.logging.Logger.getLogger(ChatGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
+            java.util.logging.Logger.getLogger(ChatGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        }
+        //</editor-fold>
+
+        /* Create and display the form */
+        java.awt.EventQueue.invokeLater(new Runnable() {
+            public void run() {
+                new ChatGUI().setVisible(true);
+            }
+        });
+    }
+
+    // Variables declaration - do not modify                     
+    private javax.swing.JButton jButton1;
+    private javax.swing.JScrollPane jScrollPane2;
+    private javax.swing.JTextArea jTextArea1;
+    private javax.swing.JTextField jTextField1;
+    // End of variables declaration                   
+}

src/chatApp/ClientGUI.java

@@ -1,22 +1,18 @@
-package javaChat;
+package chatApp;
 
 import java.net.* ;
 import java.io.* ;
 
-/**
- * 
- *
- * @author osheas1
- * @version 1.0.0 2020-12-07 Initial implementation
- *
- */
 public class ClientGUI 
     {
     
+    static LoginGUI login = new LoginGUI() ;
+    static ChatGUI chatRoom = new ChatGUI() ;
+    
+    @SuppressWarnings( "javadoc" )
     public static void main( String[] args ) throws IOException
         {
         
-        UserInterface login = new UserInterface() ;
         login.setVisible( true ); 
 
         boolean done = false ;
@@ -36,24 +32,42 @@ public class ClientGUI
         DataInputStream dataStreamIn = new DataInputStream( socket.getInputStream() ) ;    
         DataOutputStream dataStreamOut = new DataOutputStream( socket.getOutputStream() ) ;             
         
-        BufferedReader keyboard = new BufferedReader( new InputStreamReader( System.in ) ) ;
-        
         dataStreamOut.writeUTF( username ) ;
         
+        chatRoom.setTitle( "logged in as: " + username ) ;
+        chatRoom.setVisible( true ) ;
+        
         // Thread for sending messages
         Thread sendMessage = new Thread(new Runnable()
             {
             @Override
             public void run() 
                 {                              
-                System.out.print( "\n-= Type /help for a list of commands =-" ) ;
                 while( true )
                     {
                     try
                         {
-                        String messageOut = keyboard.readLine() ;
+                        // if-statement is only triggered if client closes window (disconnects)
+                        if( !chatRoom.isVisible() )
+                            {
+                            dataStreamOut.writeUTF( "/quit" ) ;
+                            dataStreamIn.close() ;
+                            dataStreamOut.close() ;
+                            socket.close() ;
+                            System.exit( 0 ) ;
+                            }
+                        // extract message information from GUI text field
+                        if( chatRoom.messageReady )
+                            {
+                            String messageOut = chatRoom.getMessageOut() ;     
+                            if( messageOut == null )
+                                {
+                                continue ;
+                                }
                             dataStreamOut.writeUTF( messageOut ) ;                            
                             }
+                        System.out.print("") ;
+                        }
                     catch( IOException x )
                         {
                         x.printStackTrace() ;
@@ -75,7 +89,7 @@ public class ClientGUI
                    try
                        {                      
                        String messageIn = dataStreamIn.readUTF() ;                      
-                       System.out.printf( "%n%s\n", messageIn ) ;
+                       chatRoom.printMessage( messageIn ) ;                            
                        }
                    catch( IOException x )
                        {
@@ -90,8 +104,6 @@ public class ClientGUI
         sendMessage.start() ;
         receiveMessage.start() ;
  
-
         }
-
     }
 	// end class ClientGUI

src/chatApp/LoginGUI.java

@@ -0,0 +1,182 @@
+package chatApp;
+
+import java.awt.* ;
+import java.util.* ;
+import javax.swing.* ;
+
+public class LoginGUI extends javax.swing.JFrame {
+
+
+    String ip ;
+    String username ;
+    boolean done ;
+
+    
+    public String getIP()    
+        {
+        return ip ;
+        }
+
+    public String getUsername()    
+        {
+        return username ;
+        }
+
+    public boolean isDone()
+        {
+        return done ;
+        }
+    
+
+public LoginGUI() {
+    initComponents();
+}
+
+@SuppressWarnings("unchecked")
+// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
+private void initComponents() 
+    {
+    
+
+    jLabel1 = new javax.swing.JLabel();
+    jTextField1 = new javax.swing.JTextField();
+    jLabel2 = new javax.swing.JLabel();
+    jLabel3 = new javax.swing.JLabel();
+    ipBox = new javax.swing.JTextField();
+
+    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
+    setTitle("java chat login");
+    setAlwaysOnTop(true);
+    setResizable(false);
+
+    jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
+    jLabel1.setText("Enter Server's IP:");
+
+    jTextField1.setHorizontalAlignment(javax.swing.JTextField.CENTER);
+    ipBox.setHorizontalAlignment(javax.swing.JTextField.CENTER);
+    jTextField1.setToolTipText("");
+    jTextField1.addActionListener(new java.awt.event.ActionListener() {
+        public void actionPerformed(java.awt.event.ActionEvent evt) {
+            jTextField1ActionPerformed(evt);
+        }
+    });
+
+    jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
+    jLabel2.setText("Enter Username:");
+
+    jLabel3.setFont(new java.awt.Font("Tahoma", 0, 10)); // NOI18N
+    jLabel3.setText("inputs must be at least one character");
+    jLabel3.setEnabled(false);
+
+    ipBox.addActionListener(new java.awt.event.ActionListener() {
+        public void actionPerformed(java.awt.event.ActionEvent evt) {
+            jTextField2ActionPerformed(evt);
+        }
+    });
+
+    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(43, Short.MAX_VALUE)
+            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
+                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
+                        .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                        .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
+                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
+                        .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 132, Short.MAX_VALUE)
+                        .addComponent(ipBox))
+                    .addGap(40, 40, 40))
+                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
+                    .addComponent(jLabel3)
+                    .addContainerGap())))
+    );
+    layout.setVerticalGroup(
+        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+        .addGroup(layout.createSequentialGroup()
+            .addGap(40, 40, 40)
+            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
+                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE)
+                .addComponent(ipBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
+            .addGap(18, 18, 18)
+            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
+                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
+                .addComponent(jLabel2))
+            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
+            .addComponent(jLabel3)
+            .addContainerGap(22, Short.MAX_VALUE))
+    );
+
+    pack();
+    setLocationRelativeTo(null);
+    }// </editor-fold>                        
+
+    private void jTextField2ActionPerformed(java.awt.event.ActionEvent evt) 
+        {                                            
+        if( ipBox.getText().isBlank() )
+            {
+            jLabel3.setEnabled( true );
+            }
+        else 
+            {
+            jTextField1.grabFocus();
+            }
+        }                                           
+    
+    private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) 
+        {                                                  
+        if( jTextField1.getText().isBlank() || ipBox.getText().isBlank() )
+            {
+            jLabel3.setEnabled( true );
+            }
+        else 
+            {
+            this.ip = ipBox.getText() ;
+            this.username = jTextField1.getText() ; 
+            this.done = true ;
+            dispose();
+            }
+        }  
+/**
+ * @param args the command line arguments
+ */
+public static void main(String args[]) {
+    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(LoginGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+    } catch (InstantiationException ex) {
+        java.util.logging.Logger.getLogger(LoginGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+    } catch (IllegalAccessException ex) {
+        java.util.logging.Logger.getLogger(LoginGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
+        java.util.logging.Logger.getLogger(LoginGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+    }
+    //</editor-fold>
+
+    /* Create and display the form */
+    java.awt.EventQueue.invokeLater(new Runnable() {
+        public void run() {
+            new LoginGUI().setVisible(true);
+        }
+    });
+}
+
+
+
+// Variables declaration - do not modify                     
+private javax.swing.JLabel jLabel1;
+private javax.swing.JLabel jLabel2;
+private javax.swing.JLabel jLabel3;
+private javax.swing.JTextField jTextField1;
+private javax.swing.JTextField ipBox;
+// End of variables declaration                   
+}

src/demonstration/ChatDEMO.java

@@ -0,0 +1,166 @@
+package demonstration;
+
+@SuppressWarnings( "javadoc" )
+public class ChatDEMO extends javax.swing.JFrame {
+
+    public boolean messageReady = false ;
+    public String message ;
+    public String username ;
+    /*
+    public void giveTitle(String name)
+        {
+        this.username = name ;
+        setTitle("logged in as:" + name ) ;
+        }
+    */
+    public String getMessageOut()
+        {
+        if( this.message.contentEquals( "" ) || this.message.contentEquals( " " ) )
+            {
+            this.messageReady = false ;
+            return null ;
+            }
+        if( this.messageReady )
+            {
+            this.messageReady = false ;
+            return this.message ;
+            }
+        return null ;
+        }
+    
+    
+    public void printMessage( String messageOut )
+        {
+        messageOut = String.format( "%s\n%s", this.jTextArea1.getText(), messageOut ) ; 
+        this.jTextArea1.setText( null ) ;
+        this.jTextArea1.setText( messageOut ) ;
+        jTextArea1.moveCaretPosition( jTextArea1.getDocument().getLength() );
+        }
+    
+
+    public ChatDEMO() {
+        initComponents();
+    }
+    
+
+    @SuppressWarnings("unchecked")
+    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
+    private void initComponents() {
+
+    jTextField1 = new javax.swing.JTextField();
+    jButton1 = new javax.swing.JButton();
+    jScrollPane2 = new javax.swing.JScrollPane();
+    jTextArea1 = new javax.swing.JTextArea();
+
+    setDefaultCloseOperation(javax.swing.WindowConstants.HIDE_ON_CLOSE);
+    setTitle("logged in as: " + this.username );
+
+    jButton1.setText("send");
+    jButton1.addActionListener(new java.awt.event.ActionListener() {
+        public void actionPerformed(java.awt.event.ActionEvent evt) {
+            jButton1ActionPerformed(evt);
+        }
+    });
+    
+    jTextField1.addActionListener(new java.awt.event.ActionListener() {
+    public void actionPerformed(java.awt.event.ActionEvent evt) {
+        jTextField1ActionPerformed(evt);
+    }
+    });
+
+    setResizable(false);
+    jTextArea1.setEditable(false);
+    jTextArea1.setColumns(20);
+    jTextArea1.setRows(5);
+    jTextArea1.setWrapStyleWord(true);
+    jTextArea1.setLineWrap( true );
+    jTextArea1.moveCaretPosition( jTextArea1.getDocument().getLength() );
+    jScrollPane2.setViewportView(jTextArea1);
+
+    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(50, Short.MAX_VALUE)
+            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
+                .addComponent(jScrollPane2)
+                .addGroup(layout.createSequentialGroup()
+                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 610, javax.swing.GroupLayout.PREFERRED_SIZE)
+                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
+                    .addComponent(jButton1)))
+            .addGap(50, 50, 50))
+    );
+    layout.setVerticalGroup(
+        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+        .addGroup(layout.createSequentialGroup()
+            .addContainerGap(50, Short.MAX_VALUE)
+            .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 311, javax.swing.GroupLayout.PREFERRED_SIZE)
+            .addGap(18, 18, 18)
+            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
+                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
+                .addComponent(jButton1))
+            .addGap(50, 50, 50))
+    );
+
+    pack();
+    setLocationRelativeTo(null);
+    }// </editor-fold>                        
+
+    private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) 
+        {                                                
+        if( this.jTextField1.getText() != null )
+            {
+            this.message = this.jTextField1.getText() ;
+            this.messageReady = true ; 
+            this.jTextField1.setText( null ) ;
+            }
+        }  
+    
+    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
+
+    if( this.jTextField1.getText() != null )
+        {
+        this.message = this.jTextField1.getText() ;
+        this.messageReady = true ; 
+        this.jTextField1.setText( null ) ;
+        }
+        
+    }    
+    
+
+    public static void main(String args[]) {
+
+        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(ChatDEMO.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (InstantiationException ex) {
+            java.util.logging.Logger.getLogger(ChatDEMO.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (IllegalAccessException ex) {
+            java.util.logging.Logger.getLogger(ChatDEMO.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
+            java.util.logging.Logger.getLogger(ChatDEMO.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        }
+        //</editor-fold>
+
+        /* Create and display the form */
+        java.awt.EventQueue.invokeLater(new Runnable() {
+            public void run() {
+                new ChatDEMO().setVisible(true);
+            }
+        });
+    }
+
+    // Variables declaration - do not modify                     
+    private javax.swing.JButton jButton1;
+    private javax.swing.JScrollPane jScrollPane2;
+    private javax.swing.JTextArea jTextArea1;
+    private javax.swing.JTextField jTextField1;
+    // End of variables declaration                   
+}

src/demonstration/ClientDEMO.java

@@ -0,0 +1,110 @@
+package demonstration;
+
+import java.net.* ;
+import java.io.* ;
+
+@SuppressWarnings( "javadoc" )
+public class ClientDEMO 
+    {
+    
+    static LoginDEMO loginDemo = new LoginDEMO() ;
+    static ChatDEMO chatRoom = new ChatDEMO() ;
+    
+    @SuppressWarnings( "javadoc" )
+    public static void main( String[] args ) throws IOException
+        {
+        
+        loginDemo.setVisible( true ); 
+
+        boolean done = false ;
+        while( !done ) 
+            {
+            done = loginDemo.isDone() ;          
+            System.out.print("");
+            }
+       
+        String ip = loginDemo.getIP() ;
+        String username = loginDemo.getUsername() ;
+        
+        // Open your connection to a server, at port 6789
+        Socket socket = new Socket( ip , 6789 ) ;
+        
+        // Create communication streams
+        DataInputStream dataStreamIn = new DataInputStream( socket.getInputStream() ) ;    
+        DataOutputStream dataStreamOut = new DataOutputStream( socket.getOutputStream() ) ;             
+        
+        dataStreamOut.writeUTF( username ) ;
+        
+        chatRoom.setTitle( "logged in as: " + username ) ;
+        chatRoom.setVisible( true ) ;
+        
+        // Thread for sending messages
+        Thread sendMessage = new Thread(new Runnable()
+            {
+            @Override
+            public void run() 
+                {                              
+                while( true )
+                    {
+                    try
+                        {
+                        // if-statement is only triggered if client closes window (disconnects)
+                        if( !chatRoom.isVisible() )
+                            {
+                            dataStreamOut.writeUTF( "/quit" ) ;
+                            dataStreamIn.close() ;
+                            dataStreamOut.close() ;
+                            socket.close() ;
+                            System.exit( 0 ) ;
+                            }
+                        // extract message information from GUI text field
+                        if( chatRoom.messageReady )
+                            {
+                            String messageOut = chatRoom.getMessageOut() ;     
+                            if( messageOut == null )
+                                {
+                                continue ;
+                                }
+                            dataStreamOut.writeUTF( messageOut ) ;                            
+                            }
+                        System.out.print("") ;
+                        }
+                    catch( IOException x )
+                        {
+                        x.printStackTrace() ;
+                        System.exit( 0 ) ;
+                        }
+                    }
+                }
+            }) ;
+        
+        // Thread for receiving messages
+        Thread receiveMessage = new Thread( new Runnable()
+            {
+            
+            @Override
+            public void run()
+               {
+               while( true )
+                   {
+                   try
+                       {                      
+                       String messageIn = dataStreamIn.readUTF() ;                      
+                       chatRoom.printMessage( messageIn ) ;                            
+                       }
+                   catch( IOException x )
+                       {
+                       x.printStackTrace() ;
+                       System.exit( 0 ) ;
+                       } 
+                   }
+               }
+            });
+        
+        // Begin threads
+        sendMessage.start() ;
+        receiveMessage.start() ;
+ 
+        }
+    }
+    // end class ClientGUI

src/demonstration/LoginDEMO.java

@@ -0,0 +1,158 @@
+package demonstration;
+
+@SuppressWarnings( "javadoc" )
+public class LoginDEMO extends javax.swing.JFrame {
+
+    /**
+     * Creates new form loginGUI
+     */
+
+    public String ip ;
+    public String username ;
+    public boolean done ;
+       
+    public String getIP()    
+        {
+        return this.ip ;
+        }
+    
+    public String getUsername()    
+        {
+        return this.username ;
+        }
+    
+    public boolean isDone()
+        {
+        return this.done ;
+        }
+
+    public LoginDEMO() {
+        initComponents();
+    }
+
+    @SuppressWarnings("unchecked")
+    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
+    private void initComponents() {
+
+        jPasswordField1 = new javax.swing.JPasswordField();
+        jLabel1 = new javax.swing.JLabel();
+        jTextField1 = new javax.swing.JTextField();
+        jLabel2 = new javax.swing.JLabel();
+        jLabel3 = new javax.swing.JLabel();
+
+        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
+        setTitle("java chat login DEMO");
+        setAlwaysOnTop(true);
+        setResizable(false);
+
+        jPasswordField1.setEditable(false);
+        jPasswordField1.setHorizontalAlignment(javax.swing.JTextField.CENTER);
+        jPasswordField1.setText("12.34.56.78");
+
+        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
+        jLabel1.setText("Enter Server's IP:");
+
+        jTextField1.setHorizontalAlignment(javax.swing.JTextField.CENTER);
+        jTextField1.setToolTipText("");
+        jTextField1.addActionListener(new java.awt.event.ActionListener() {
+            public void actionPerformed(java.awt.event.ActionEvent evt) {
+                jTextField1ActionPerformed(evt);
+            }
+        });
+
+        jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
+        jLabel2.setText("Enter Username:");
+        
+        jLabel3.setFont(new java.awt.Font("Tahoma", 0, 10)); // NOI18N
+        jLabel3.setText("username must be at least one character");
+        jLabel3.setEnabled(false);
+
+        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(43, Short.MAX_VALUE)
+                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
+                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
+                            .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                            .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
+                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
+                            .addComponent(jTextField1)
+                            .addComponent(jPasswordField1, javax.swing.GroupLayout.DEFAULT_SIZE, 132, Short.MAX_VALUE))
+                        .addGap(40, 40, 40))
+                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
+                        .addComponent(jLabel3)
+                        .addContainerGap())))
+        );
+        layout.setVerticalGroup(
+            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(layout.createSequentialGroup()
+                .addGap(40, 40, 40)
+                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
+                    .addComponent(jPasswordField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
+                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 22, javax.swing.GroupLayout.PREFERRED_SIZE))
+                .addGap(18, 18, 18)
+                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
+                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
+                    .addComponent(jLabel2))
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
+                .addComponent(jLabel3)
+                .addContainerGap(22, Short.MAX_VALUE))
+        );
+
+        pack();
+        setLocationRelativeTo(null);
+    }// </editor-fold>                        
+
+    private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {                                            
+        this.ip = "74.69.251.12" ; 
+        if( jTextField1.getText().isBlank() )
+            {
+            jLabel3.setEnabled( true );
+            }
+        else 
+            {
+            this.username = jTextField1.getText() ; 
+            this.done = true ;
+            dispose();
+            }
+    }                                           
+
+    public static void main(String args[]) {
+        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(LoginDEMO.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (InstantiationException ex) {
+            java.util.logging.Logger.getLogger(LoginDEMO.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (IllegalAccessException ex) {
+            java.util.logging.Logger.getLogger(LoginDEMO.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
+            java.util.logging.Logger.getLogger(LoginDEMO.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
+        }
+        //</editor-fold>
+
+        /* Create and display the form */
+        java.awt.EventQueue.invokeLater(new Runnable() {
+            public void run() {
+                new LoginDEMO().setVisible(true);
+            }
+        });
+    }
+
+    // Variables declaration - do not modify                     
+    private javax.swing.JLabel jLabel1;
+    private javax.swing.JLabel jLabel2;
+    private javax.swing.JLabel jLabel3;
+    private javax.swing.JPasswordField jPasswordField1;
+    private javax.swing.JTextField jTextField1;
+    // End of variables declaration                   
+}

src/javaChat/ChatServer.java

@@ -1,237 +0,0 @@
-package javaChat;
-
-import java.net.* ;
-import java.util.* ;
-import java.io.* ;
-
-public class ChatServer
-    {
-
-    // List of all active users in Server
-    static ArrayList<ClientHandler> userList = new ArrayList<>() ;
-    
-    /**
-     * Accepts Client requests to join chat server, and
-     * creates new thread for each individual client.
-     *
-     * @param args
-     * @throws IOException
-     */
-    public static void main( String[] args ) throws IOException
-        {
-        
-        // Register service on port 6789
-        ServerSocket serverSocket = new ServerSocket( 6789 ) ;
-        Socket socket = null ;
-        
-        System.out.println( "\nServer established. Awaiting connections..." ) ;
-        
-        // Accept client requests
-        while( true )
-            {
-            socket = serverSocket.accept() ;
-            
-            DataOutputStream dataStreamOut = new DataOutputStream( socket.getOutputStream() ) ;        
-            DataInputStream dataStreamIn = new DataInputStream ( socket.getInputStream() ) ;
-            
-            System.out.println( "\nClient connection detected, requesting username..." ) ;
-            String username = dataStreamIn.readUTF() ;
-            
-            ClientHandler handle = new ClientHandler( socket, username, dataStreamOut, dataStreamIn ) ;
-            
-            System.out.println( "\nCreating new thread...\n" ) ;
-            Thread thread = new Thread( handle ) ;
-            
-            userList.add( handle ) ;
-            
-            thread.start() ;
-            
-            }
-        }
-
-    }
-    // end class ChatClient
-
-
-
-
-    // This class manages the actual messages being sent around
-    @SuppressWarnings( "javadoc" )
-    class ClientHandler implements Runnable
-        {
-        
-        Socket socket ;
-        String username ;
-        final DataOutputStream dataStreamOut ;
-        final DataInputStream dataStreamIn ;
-        boolean loggedIn ;
-        private ArrayList<ClientHandler> userList ;
-    
-        
-    /**
-     * Constructor
-     * @param s : client socket
-     * @param user  : client's user-name
-     * @param dos : data stream to client
-     * @param dis : data stream from client
-     */
-    public ClientHandler( Socket s, String user, 
-                          DataOutputStream dos,
-                          DataInputStream dis )
-        {
-        this.username = user ;
-        this.socket = s ;
-        this.dataStreamOut = dos ;
-        this.dataStreamIn = dis ;
-        this.loggedIn = true ;
-        
-        }
-    
-    @Override
-    public void run() 
-        {
-        
-        // Note the connection of the new user
-        String announcement = String.format( "-= User \"%s\" has successfully connected =-\n", this.username ) ;
-        System.out.println( announcement ) ;
-       
-        // Distribute announcement to entire server
-        distributeAll( announcement ) ;
-            
-        // Message management
-        String message = "" ;      
-        while( true ) 
-            {
-                // Read incoming messages
-                try
-                    {
-                    message = this.dataStreamIn.readUTF() ;
-                    }
-                catch ( IOException x )
-                    {
-                    x.printStackTrace() ;
-                    }      
-                
-                // Check message for user commands, returns TRUE is user quits
-                if( commands(message, this) )
-                    {
-                    break ;
-                    }
-                
-                // Print the message server-side
-                message = String.format( "%s: %s", this.username, message ) ;
-                System.out.println( message ) ;
-                
-                // Distribute the message to all users
-                sendMessage( message ) ;
-                // end try
-            
-            }
-        
-            try
-                {
-                this.loggedIn = false ;
-                this.socket.close() ;
-                }
-            catch( IOException x )
-                {
-                x.printStackTrace() ;
-                }
-        }
- 
-    
-    // This method manages the usage of user-commands
-    public boolean commands(String message, ClientHandler user) 
-        {
-        String[] commands = new String[] {"/help", "/quit", "/userlist"} ;
-        
-        try {
-            
-            // Quit command terminates connection, with an announcement
-            if( message.equals( "/quit" )) 
-                {
-                String announcement = String.format( "\n-= \"%s\" has disconnected =- \n", user.username ) ;
-                System.out.println( announcement ) ;
-                distributeAll( announcement ) ;
-                return true ;
-                }
-            
-            if( message.equals( "/userlist" ) ) 
-                {
-                user.dataStreamOut.writeUTF( "Current list of users in the server: " ) ;
-                for( ClientHandler users : ChatServer.userList )
-                    {                    
-                    if( !users.loggedIn )
-                        {
-                        continue ;
-                        }
-                    
-                    user.dataStreamOut.writeUTF( users.username ) ;
-                    
-                    }   
-                }
-            
-            if( message.contentEquals( "/help" ) )
-                {
-                user.dataStreamOut.writeUTF( "\nAll available commands: " );
-                for(int i = 0; i < commands.length; i++ ) 
-                    {
-                    user.dataStreamOut.writeUTF( commands[i] );
-                    }
-                
-                    user.dataStreamOut.writeUTF( "\n" ) ;
-                }
-        }
-        
-        catch( IOException x )
-            {
-            System.out.println( x ) ;
-            }
-        
-        return false ;
-        }
-    
-    
-    // Convenience method to send messages (but not to the user that's sending the message)
-    private void sendMessage(String message)
-        {
-        try
-            {      
-            for( ClientHandler users : ChatServer.userList )
-                {                    
-                if( !users.loggedIn || users.equals( this ) )
-                    {
-                    continue ;
-                    }
-                users.dataStreamOut.writeUTF( "> " + message ) ;
-                }    
-            }
-        catch ( IOException x )
-            {
-            x.printStackTrace() ;
-            }
-        }
-    
-    
-    // Convenience method to distribute messages to all clients (announcements)
-    private void distributeAll(String message)
-        {
-        try
-            {      
-            for( ClientHandler users : ChatServer.userList )
-                {                    
-                if( !users.loggedIn )
-                    {
-                    continue ;
-                    }
-                users.dataStreamOut.writeUTF( message ) ;
-                }    
-            }
-        catch ( IOException x )
-            {
-            x.printStackTrace() ;
-            }
-        }
-
-    }
-    // end class ClientHandler

src/javaChat/UserInterface.java

@@ -1,288 +0,0 @@
-package javaChat;
-
-import java.awt.* ;
-import java.util.* ;
-import javax.swing.* ;
-
-public class UserInterface extends javax.swing.JFrame {
-
-
-    String ip ;
-    String username ;
-    boolean done ;
-
-/**
- * Creates new form loginFrame
- */
-public UserInterface() {
-    initComponents();
-}
-
-/**
- * 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() 
-    {
-    
-    jTextField1 = new javax.swing.JTextField();
-    jLabel1 = new javax.swing.JLabel();
-    jLabel2 = new javax.swing.JLabel();
-    jTextField2 = new javax.swing.JTextField();
-    jButton1 = new javax.swing.JButton();
-    jSlider1 = new javax.swing.JSlider();
-    jSlider2 = new javax.swing.JSlider();
-    jSlider3 = new javax.swing.JSlider();
-    jSlider4 = new javax.swing.JSlider();
-    
-    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
-    setTitle("Java Chat");
-    setAlwaysOnTop(true);
-    setBackground(new java.awt.Color(255, 255, 255));
-    setForeground(java.awt.Color.white);
-    setResizable(false);
-    
-    jTextField1.setEditable(false);
-    jTextField1.setHorizontalAlignment(javax.swing.JTextField.CENTER);
-    jTextField1.setText("0.0.0.0");
-    
-    jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
-    jLabel1.setText("Enter Server's I.P. Address:");
-    
-    jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
-    jLabel2.setText("Enter your desired username:");
-    
-    jTextField2.setHorizontalAlignment(javax.swing.JTextField.CENTER);
-    jTextField2.setActionCommand("<Not Set>");
-    
-    jButton1.setText("Connect");
-    jButton1.setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));
-    jButton1.setOpaque(false);
-    jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
-        public void mouseClicked(java.awt.event.MouseEvent evt) {
-            jButton1MouseClicked(evt);
-        }
-    });
-    
-    jSlider1.setMaximum(999);
-    jSlider1.setOrientation(javax.swing.JSlider.VERTICAL);
-    jSlider1.setValue(0);
-    jSlider1.addChangeListener(new javax.swing.event.ChangeListener() {
-        public void stateChanged(javax.swing.event.ChangeEvent evt) {
-            jSlider1StateChanged(evt);
-        }
-    });
-    
-    jSlider2.setMaximum(999);
-    jSlider2.setOrientation(javax.swing.JSlider.VERTICAL);
-    jSlider2.setValue(0);
-    jSlider2.addChangeListener(new javax.swing.event.ChangeListener() {
-        public void stateChanged(javax.swing.event.ChangeEvent evt) {
-            jSlider2StateChanged(evt);
-        }
-    });
-    
-    jSlider3.setMaximum(999);
-    jSlider3.setOrientation(javax.swing.JSlider.VERTICAL);
-    jSlider3.setValue(0);
-    jSlider3.addChangeListener(new javax.swing.event.ChangeListener() {
-        public void stateChanged(javax.swing.event.ChangeEvent evt) {
-            jSlider3StateChanged(evt);
-        }
-    });
-    
-    jSlider4.setMaximum(999);
-    jSlider4.setOrientation(javax.swing.JSlider.VERTICAL);
-    jSlider4.setValue(0);
-    jSlider4.addChangeListener(new javax.swing.event.ChangeListener() {
-        public void stateChanged(javax.swing.event.ChangeEvent evt) {
-            jSlider4StateChanged(evt);
-        }
-    });
-    
-    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
-    getContentPane().setLayout(layout);
-    layout.setHorizontalGroup(
-        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-        .addGroup(layout.createSequentialGroup()
-            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-                .addGroup(layout.createSequentialGroup()
-                    .addGap(60, 60, 60)
-                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
-                        .addGroup(layout.createSequentialGroup()
-                            .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
-                            .addGap(18, 18, 18)
-                            .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 137, javax.swing.GroupLayout.PREFERRED_SIZE))
-                        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
-                            .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 160, javax.swing.GroupLayout.PREFERRED_SIZE)
-                            .addGap(18, 18, 18)
-                            .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 137, javax.swing.GroupLayout.PREFERRED_SIZE))))
-                .addGroup(layout.createSequentialGroup()
-                    .addGap(162, 162, 162)
-                    .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 81, javax.swing.GroupLayout.PREFERRED_SIZE)))
-            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 60, Short.MAX_VALUE)
-            .addComponent(jSlider1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
-            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
-            .addComponent(jSlider2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
-            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
-            .addComponent(jSlider3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
-            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
-            .addComponent(jSlider4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
-            .addGap(56, 56, 56))
-    );
-    layout.setVerticalGroup(
-        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
-        .addGroup(layout.createSequentialGroup()
-            .addGap(24, 24, 24)
-            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
-                .addGroup(layout.createSequentialGroup()
-                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
-                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
-                            .addComponent(jSlider3, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE)
-                            .addComponent(jSlider2, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE)
-                            .addComponent(jSlider1, javax.swing.GroupLayout.PREFERRED_SIZE, 147, javax.swing.GroupLayout.PREFERRED_SIZE))
-                        .addComponent(jSlider4, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.PREFERRED_SIZE, 147, javax.swing.GroupLayout.PREFERRED_SIZE))
-                    .addContainerGap(40, Short.MAX_VALUE))
-                .addGroup(layout.createSequentialGroup()
-                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
-                        .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
-                        .addComponent(jLabel1))
-                    .addGap(36, 36, 36)
-                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
-                        .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
-                        .addComponent(jLabel2))
-                    .addGap(28, 28, 28)
-                    .addComponent(jButton1)
-                    .addGap(30, 30, 30))))
-    );
-    
-    pack();
-    }// </editor-fold>                        
-
-private void jButton1MouseClicked(java.awt.event.MouseEvent evt) 
-    {                                      
-    ip = jTextField1.getText() ; 
-    username = jTextField2.getText() ;
-    //System.out.printf( "IP: %s \nUsername: %s\n", ip, username ) ;
-    
-   
-    done = true ;
-    setVisible( false ) ;
-    dispose() ;
-    
-    }                                     
-
-private void jSlider1StateChanged(javax.swing.event.ChangeEvent evt) 
-    {                                      
-    Integer a = jSlider1.getValue() ;
-    Integer b = jSlider2.getValue() ;
-    Integer c = jSlider3.getValue() ;
-    Integer d = jSlider4.getValue() ;
-    
-    String ip = String.format("%s.%s.%s.%s", a, b, c, d) ;
-    
-    jTextField1.setText( ip.toString() ) ;
-    }                                     
-
-private void jSlider2StateChanged(javax.swing.event.ChangeEvent evt)
-    {                                      
-    Integer a = jSlider1.getValue() ;
-    Integer b = jSlider2.getValue() ;
-    Integer c = jSlider3.getValue() ;
-    Integer d = jSlider4.getValue() ;
-    
-    String ip = String.format("%s.%s.%s.%s", a, b, c, d) ;
-    
-    jTextField1.setText( ip.toString() ) ;
-    }                                     
-
-private void jSlider3StateChanged(javax.swing.event.ChangeEvent evt) 
-    {                                      
-    Integer a = jSlider1.getValue() ;
-    Integer b = jSlider2.getValue() ;
-    Integer c = jSlider3.getValue() ;
-    Integer d = jSlider4.getValue() ;
-    
-    String ip = String.format("%s.%s.%s.%s", a, b, c, d) ;
-    
-    jTextField1.setText( ip.toString() ) ;
-    }                                     
-
-private void jSlider4StateChanged(javax.swing.event.ChangeEvent evt) 
-    {                                      
-    Integer a = jSlider1.getValue() ;
-    Integer b = jSlider2.getValue() ;
-    Integer c = jSlider3.getValue() ;
-    Integer d = jSlider4.getValue() ;
-    
-    String ip = String.format("%s.%s.%s.%s", a, b, c, d) ;
-    
-    jTextField1.setText( ip.toString() ) ;
-    }                                     
-
-/**
- * @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(UserInterface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
-    } catch (InstantiationException ex) {
-        java.util.logging.Logger.getLogger(UserInterface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
-    } catch (IllegalAccessException ex) {
-        java.util.logging.Logger.getLogger(UserInterface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
-    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
-        java.util.logging.Logger.getLogger(UserInterface.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
-    }
-    //</editor-fold>
-
-    /* Create and display the form */
-    java.awt.EventQueue.invokeLater(new Runnable() {
-        public void run() {
-            new UserInterface().setVisible(true);
-        }
-    });
-}
-
-
-public String getIP()    
-    {
-    return ip ;
-    }
-
-public String getUsername()    
-    {
-    return username ;
-    }
-
-public boolean isDone()
-    {
-    return done ;
-    }
-
-// Variables declaration - do not modify                     
-private javax.swing.JButton jButton1;
-private javax.swing.JLabel jLabel1;
-private javax.swing.JLabel jLabel2;
-private javax.swing.JSlider jSlider1;
-private javax.swing.JSlider jSlider2;
-private javax.swing.JSlider jSlider3;
-private javax.swing.JSlider jSlider4;
-private javax.swing.JTextField jTextField1;
-private javax.swing.JTextField jTextField2;
-// End of variables declaration                   
-}