first

.idea/encodings.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding" addBOMForNewFiles="with NO BOM" />
+</project>
\ No newline at end of file

.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="11" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file

.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/lab10.iml" filepath="$PROJECT_DIR$/lab10.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

lab10.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

src/chatRoom/ChatArea.java

+package chatRoom;
+
+import javax.swing.*;
+
+public class ChatArea extends JTextArea {
+
+    private static final int ROWS = 10, COLUMNS = 30;
+
+    public ChatArea() {
+        super(ROWS, HEIGHT);
+        this.setEditable(false);
+        this.setLineWrap(true);
+    }
+
+    public void addMessage(String username, String message) {
+        this.setText(this.getText() + username + ":\n" + message + "\n");
+
+    }
+
+
+}

src/chatRoom/ChatRoomGUI.java

+package chatRoom;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class ChatRoomGUI extends JFrame {
+    private static String WINDOWS_TITLE = "AUT Chat Room";
+    private final int WIDTH = 500, HEIGHT = 500;
+    private final int X = 100, Y = 100;
+    private ChatArea chatBox;
+    private MessageArea messageArea;
+    private ParticipantsArea participantsArea;
+
+    public ChatRoomGUI() throws HeadlessException {
+        super();
+        this.setTitle(WINDOWS_TITLE);
+        this.setLayout(new BorderLayout());
+        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        this.setSize(WIDTH, HEIGHT);
+        this.setLocation(X, Y);
+
+        chatBox = new ChatArea();
+        this.add(new JScrollPane(chatBox), BorderLayout.CENTER);
+
+        messageArea = new MessageArea();
+        this.add(messageArea, BorderLayout.SOUTH);
+
+        participantsArea = new ParticipantsArea();
+        this.add(participantsArea, BorderLayout.WEST);
+
+        this.setVisible(true);
+
+
+
+    }
+
+    public void addNewMessage(String username, String message) {
+        chatBox.addMessage(username, message);
+    }
+
+    public void addNewParticipant(String username) {
+        participantsArea.addParticipant(username);
+    }
+
+    public void removeParticipant(String username) {
+        participantsArea.removeParticipant(username);
+    }
+
+
+}

src/chatRoom/Main.java

+package chatRoom;
+
+import chatRoom.ChatRoomGUI;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class Main {
+    public static void main (String[] args) {
+	ChatRoomGUI chat=new ChatRoomGUI();
+        chat.addNewParticipant("ali");
+        chat.addNewParticipant("mohammad");
+        chat.removeParticipant("ali");
+
+    }
+}

src/chatRoom/MessageArea.java

+package chatRoom;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class MessageArea extends JPanel {
+    public MessageArea() {
+        super(new BorderLayout());
+        JButton send = new JButton("Send");
+        this.add(send, BorderLayout.EAST);
+        JTextField text = new JTextField();
+        text.setBackground(Color.green);
+        this.add(text, BorderLayout.CENTER);
+
+    }
+}

src/chatRoom/NameFrame.java

+package chatRoom;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class NameFrame extends JFrame {
+
+    private static final String BTN_TXT="Start Chatting...";
+    private static final String LABEL_TXT="Choose Your UserName";
+    private static final  int width=300,height=100;
+    JTextField textField;
+    JButton btn;
+    public NameFrame()throws HeadlessException{
+        super();
+        this.setLayout(new BorderLayout());
+        JLabel label=new JLabel("Choose Your UserName");
+        add(label,BorderLayout.PAGE_START);
+        textField=new JTextField();
+        add(textField,BorderLayout.CENTER);
+        btn=new JButton(LABEL_TXT);
+        add(btn,BorderLayout.PAGE_END);
+        setSize(width,height);
+        setVisible(true);
+    }
+}

src/chatRoom/ParticipantsArea.java

+package chatRoom;
+
+import javax.swing.*;
+import java.util.ArrayList;
+
+public class ParticipantsArea extends JList<String> {
+    private ArrayList<String> participants = new ArrayList<>();
+
+    public ParticipantsArea() {
+        super();
+        this.setListData(participants.toArray(new String[participants.size()]));
+        this.setVisible(true);
+    }
+
+    public void addParticipant(String username) {
+        participants.add(username);
+        this.setListData(participants.toArray(new String[participants.size()]));
+    }
+
+    public void removeParticipant(String username) {
+        participants.remove(username);
+        this.setListData(participants.toArray(new String[participants.size()]));
+    }
+}

src/chatRoom/UsernameFrame.java

+package chatRoom;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class UsernameFrame extends JFrame {
+    private static final String BTN_TXT = "Start Chatting ...";
+    private static final String LABEL_TXT = "Choose Your UserName";
+    private static final int WIDTH = 300, HEIGHT = 100;
+
+    JTextField textField;
+    JButton btn;
+
+    public UsernameFrame() throws HeadlessException {
+        super();
+        this.setLayout(new BorderLayout());
+        JLabel label = new JLabel(LABEL_TXT);
+        add(label, BorderLayout.PAGE_START);
+        textField = new JTextField();
+        add(textField, BorderLayout.CENTER);
+        btn = new JButton(BTN_TXT);
+        add(btn, BorderLayout.PAGE_END);
+        setSize(WIDTH, HEIGHT);
+        setVisible(true);
+    }
+}
\ No newline at end of file