First Phase

src/ChatRoomGUI.java

@@ -10,13 +10,22 @@ public class ChatRoomGUI extends JFrame {
     public ChatRoomGUI() {
         super();
         this.setTitle(WINDOWS_TITLE);
-        this.setLayout(null);
+        this.setLayout(new BorderLayout());
         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         this.setSize(WIDTH, HEIGHT);
         this.setLocation(X, Y);
         this.setVisible(true);
         ChatArea chatBox = new ChatArea();
         this.add(new JScrollPane(chatBox), BorderLayout.CENTER);
+        MessageArea messageArea = new MessageArea();
+        this.add(messageArea, BorderLayout.SOUTH);
+        this.setVisible(true);
+        ParticipantsArea participantsArea = new ParticipantsArea();
+        this.add(participantsArea, BorderLayout.WEST);
+        participantsArea.addNewParticipant(" Amirmehdy");
+        participantsArea.addNewParticipant(" Abtin");
+        participantsArea.removeParticipant(" Amirmehdy");
+        this.setVisible(true);
     }
 
 

src/Main.java

 public class Main {
 
     public static void main(String[] args) {
-        //System.out.println("Hello World!");
-        //UsernameFrame usernameFrame = new UsernameFrame();
         ChatRoomGUI chatRoomGUI = new ChatRoomGUI();
+        UsernameFrame u = new UsernameFrame();
     }
 
 }

src/MessageArea.java

-public class MessageArea {
+import javax.swing.*;
+import java.awt.*;
+
+public class MessageArea extends JPanel {
+    JTextField msg = new JTextField();
+    JTextField textField;
+    JButton btn;
+    private static final String BTN_TXT = "Send Message";
+
+    public MessageArea() {
+        super();
+        this.setLayout(new BorderLayout());
+        textField = new JTextField();
+        add(textField, BorderLayout.CENTER);
+        btn = new JButton(BTN_TXT);
+        add(btn, BorderLayout.EAST);
+        setVisible(true);
+    }
+
+
 }

src/ParticipantsArea.java

-public class ParticipantsArea {
+import javax.swing.*;
+import java.awt.*;
 
+public class ParticipantsArea extends JPanel {
 
-    public void addNewParticipant(String username) {
+    private static final String LABEL_TXT = "Online People: ";
+    DefaultListModel model;
+
+    public ParticipantsArea() {
+        super();
+        this.setLayout(new BorderLayout());
+        JLabel label = new JLabel(LABEL_TXT);
+        add(label, BorderLayout.PAGE_START);
+        model = new DefaultListModel();
+        JList list = new JList(model);
+        add(list, BorderLayout.CENTER);
+        setVisible(true);
 
     }
 
-    public void removeParticipant(String username) {
+    public void addNewParticipant(String username) {
+        model.addElement(username);
+    }
 
+    public void removeParticipant(String username) {
+        model.removeElement(username);
     }
 }

src/UsernameFrame.java

@@ -11,11 +11,11 @@ public class UsernameFrame extends JFrame {
     public UsernameFrame() throws HeadlessException {
         super();
         this.setLayout(new BorderLayout());
-        JLabel label = new JLabel("Choose Your UserName");
+        JLabel label = new JLabel(LABEL_TXT);
         add(label, BorderLayout.PAGE_START);
         textField = new JTextField();
         add(textField, BorderLayout.CENTER);
-        btn = new JButton(LABEL_TXT);
+        btn = new JButton(BTN_TXT);
         add(btn, BorderLayout.PAGE_END);
         setSize(WIDTH, HEIGHT);
         setVisible(true);