initial commit

src/ChatArea.java

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

src/ChatRoomGUI.java

+import java.awt.BorderLayout;
+import java.awt.Component;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+
+import javax.swing.*;
+public class ChatRoomGUI extends JFrame{
+	private final String WINDOWS_TITLE = "AUT Chat Room";
+	private final int WIDTH = 500, HEIGHT = 500;
+	private final int X = 100, Y = 100;
+	public ChatArea chatBox;
+	private ParticipantArea participant;
+	private MessageArea msg;
+	
+	public Network network;
+
+
+	public ChatRoomGUI() {
+		super();
+		this.setTitle(WINDOWS_TITLE);
+		this.setLayout(new BorderLayout());
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setSize(WIDTH, HEIGHT);
+		this.setLocation(X, Y);
+		this.setVisible(true);
+		chatBox = new ChatArea();
+		msg = new MessageArea(this);
+		this.add(new JScrollPane(chatBox), BorderLayout.CENTER);
+		this.add(new JScrollPane(msg), BorderLayout.PAGE_END);
+		participant = new ParticipantArea();
+		this.add(new JScrollPane(participant), BorderLayout.WEST);
+		
+		
+		
+		network = new Network(this);
+		
+	}
+	public void addNewMessage(String name , String text) {
+		chatBox.addMessage(name,text);
+	}
+	public void addNewParticipant(String name) {
+		participant.addOnlinePerson(name);
+	}
+
+	public void removeParticipant(String name) {
+		participant.removeOnlinePerson(name);
+	}
+
+}
+

src/ClientHandler.java

+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.net.Socket;
+import java.net.UnknownHostException;
+import java.util.Scanner;
+
+public class ClientHandler implements Runnable {
+	private Socket socket;
+	private Server server;
+	private PrintWriter dataOutputStream;
+	private Scanner dataInputStream;
+
+	public ClientHandler(Socket client, Server server) throws Exception {
+		if (client == null) {
+			System.out.println("client can't be null");
+		}
+		this.socket = client;
+		this.server = server;
+		dataInputStream = new Scanner(client.getInputStream());
+		dataOutputStream = new PrintWriter(client.getOutputStream(),true);
+
+	}
+
+	public void handleIncomingMessages(String message) {
+		for(ClientHandler clientHandler : server.clients)
+			clientHandler.dataOutputStream.println(message);
+	}
+	@Override
+	public void run() {
+		while(true) {
+			try {
+				String input = dataInputStream.nextLine();
+				if(input == "exit") {
+					break;
+				}
+				handleIncomingMessages(input);
+			}
+			catch(Exception e) {
+				e.printStackTrace();
+			}
+		}
+	}
+
+
+
+}

src/Main.java

+
+public class Main {
+
+	public static void main(String[] args) {
+		
+		//ChatRoomGUI chatRoom = new ChatRoomGUI();
+		UsernameFrame username = new UsernameFrame();
+		/*chatRoom.addNewMessage("User 0", "Hello");
+		for(dint i=0 ;i<10;i++) {
+			chatRoom.addNewParticipant("User "+ i);
+		}
+		chatRoom.removeParticipant("User 1");*/
+		
+
+	}
+
+}

src/MessageArea.java

+import java.awt.BorderLayout;
+import java.awt.Label;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+import javax.swing.JButton;
+import javax.swing.JPanel;
+import javax.swing.JTextField;
+
+
+public class MessageArea extends JPanel {
+	JTextField t;
+	JButton b;
+	public final static String TEXT = "send message:";
+	ChatRoomGUI chat;
+	
+	public MessageArea(ChatRoomGUI chat) {
+		this.chat = chat;
+		this.setLayout(new BorderLayout());
+		t = new JTextField();
+		this.add(t,BorderLayout.CENTER);
+		b = new JButton(TEXT);
+		add(b, BorderLayout.EAST);
+
+		this.setVisible(true);
+		
+		
+		b.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				
+			chat.network.send(t.getText());
+			}
+			
+		});
+		
+	}
+	
+	public String getText() {
+		return t.getText();
+	}
+
+		
+	
+
+}

src/Network.java

+import java.io.IOException;
+import java.io.PrintWriter;
+import java.net.Socket;
+import java.util.Scanner;
+
+public class Network {
+	private ChatRoomGUI myChat;
+	private PrintWriter dataOutputStream;
+	private Scanner dataInputStream;
+	private Socket socket;
+
+	public Network(ChatRoomGUI myChat) {
+
+		this.myChat = myChat;
+		try {
+			socket = new Socket("localhost",1234);
+			dataInputStream = new Scanner(socket.getInputStream());
+			dataOutputStream = new PrintWriter(socket.getOutputStream(),true);
+
+
+		} catch (IOException e) {
+			// TODO Auto-generated catch block
+		}		
+
+	}
+
+	public void send(String s) {
+		try {
+		dataOutputStream.println(s);
+		}
+		catch(Exception e){
+			e.printStackTrace();
+			
+		}
+	}
+	
+	
+
+
+	public void run() {
+		while(true) {
+			try {
+			String input = dataInputStream.nextLine();
+			myChat.chatBox.addMessage("Server", input);
+			}
+			catch(Exception e) {
+				e.printStackTrace();
+			}
+		}
+			
+	}
+
+}

src/ParticipantArea.java

+import java.awt.BorderLayout;
+import java.awt.Label;
+
+import javax.swing.DefaultListModel;
+import javax.swing.JList;
+import javax.swing.JPanel;
+
+public class ParticipantArea extends JPanel{
+	DefaultListModel<String> onlinelist;
+	public final static String TEXT = "online people:";
+	
+	public ParticipantArea() {
+		super();
+		this.setLayout(new BorderLayout());
+		Label l1 = new Label(TEXT);
+		this.add(l1,BorderLayout.PAGE_START );
+		onlinelist = new DefaultListModel<>();
+		JList <String> list = new JList<>(onlinelist);
+		list.setSize(50,50);
+		this.add(list, BorderLayout.WEST);
+		this.setVisible(true);
+		
+	}
+	public void addOnlinePerson(String username) {
+		onlinelist.addElement(username);
+	}
+	
+	public void removeOnlinePerson(String username) {
+		onlinelist.removeElement(username);
+	}
+}

src/Server.java

+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.util.ArrayList;
+
+public class Server implements Runnable {
+	private static final int PORT = 1234;
+	private ServerSocket serverSocket;
+	DataOutputStream dos;
+	DataInputStream dis;
+	ArrayList<ClientHandler> clients;
+
+	public Server() throws IOException {
+		serverSocket = new ServerSocket(PORT);
+
+	}
+
+	@Override
+	public void run() {
+		while(true) {
+			try {
+
+				Socket client = serverSocket.accept();
+				ClientHandler cur =  new ClientHandler(client , this);
+				clients.add(cur);
+				Thread thread = new Thread(cur);
+				thread.start();
+
+			} catch (Exception e) {
+				System.out.println("error!");
+			}
+		}
+	}
+
+	public static void main(String args[]) {
+
+		try {
+			Server server = new Server();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+}
+
+
+

src/UsernameFrame.java

+import java.awt.BorderLayout;
+import java.awt.HeadlessException;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JTextField;
+public class UsernameFrame extends JFrame {
+	private static final String BTN_TXT = " Start Chatting ...";
+	private static final String LABEL_TEXT = " Choose Your UserName ";
+	private static final int WIDTH = 300, HEIGHT = 300;
+	JTextField textField;
+	JButton btn;
+	ChatRoomGUI c;
+	public UsernameFrame() throws HeadlessException {
+		super();
+		this.setLayout(new BorderLayout());
+		JLabel label = new JLabel(LABEL_TEXT);
+		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);
+		
+		btn.addActionListener(new ActionListener(){
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				
+				String name = textField.getText();
+			//	System.out.println(name);
+			//	System.out.println("");
+				c = new ChatRoomGUI();
+				c.addNewParticipant(name);
+			}
+			
+		});
+	}
+	
+	public String getName() {
+		return textField.getText();
+	}
+
+	
+}
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