Client.java

import java.io.*;import java.net.*;import java.util.*;import javax.swing.*;import java.awt.*;import java.awt.event.*;public class Client extends JPanel implements ActionListener{	protected static JTextField textField;	protected static JTextArea textArea;	protected static JButton but;	public static String nick;	private static InetAddress ch;	private static final int PORT = 7777;	private static final String ERROR = "ERROR : ";    private final static String newline = "\n";    public Scanner scan;	public PrintWriter out;	public static int new1 = 1;	public static Socket l;	public Scanner in;	public static String mess;	public static void main(String[] args)	{		try		{			ch = InetAddress.getLocalHost();			System.out.println("******************************************");			System.out.println("*------CONNECTED TO SERVER ON "+PORT+".------*");			System.out.println("******************************************");		}		catch(IOException e)		{			System.out.println(ERROR + "Host not found!");			System.exit(1);		}		nick = JOptionPane.showInputDialog("Enter Your Nickname.");		JFrame frame = new JFrame("Client GUI");	    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);	    JComponent newContentPane = new Client();	    newContentPane.setOpaque(true);	    frame.setContentPane(newContentPane);	    frame.pack();        frame.setVisible(true);	}	public static void run()	{		Socket l = null;		try		{			l = new Socket("modarators.no-ip.org", PORT);			Scanner scan = new Scanner(l.getInputStream());			PrintWriter out = new PrintWriter(l.getOutputStream() , true);			Scanner in = new Scanner(System.in);			String response;			out.println(nick + "has loged in.");			response = scan.nextLine();			GUIprint(response);			response = "";			do			{				mess = textField.getText();				out.println(mess);				response = scan.nextLine();				GUIprint(response);			}			while(!mess.equals("--CLOSE--"));		}		catch(IOException e)		{			e.printStackTrace();		}		finally		{			try			{				System.out.println("\nClosing Connection..");				l.close();			}			catch(IOException e)			{				System.out.println(ERROR + "Unable to dissconect!");				System.exit(1);			}		}	}	public static void GUIprint(String s)	{		String txt = s;		if(!txt.equals(""))		{		textArea.append(nick + " : " + txt + newline);		}	}	public Client()	{		super(new GridBagLayout());        textField = new JTextField(25);        textField.addActionListener(this);        but = new JButton("Send");        but.addActionListener(this);        textArea = new JTextArea(10, 30);        textArea.setEditable(false);        JScrollPane scrollPane = new JScrollPane(textArea        ,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,        JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);        GridBagConstraints c = new GridBagConstraints();        c.gridwidth = GridBagConstraints.REMAINDER;        c.fill = GridBagConstraints.HORIZONTAL;        c.fill = GridBagConstraints.BOTH;        c.weightx = 1.0;        c.weighty = 1.0;        add(scrollPane, c);        add(textField);        add(but);	}	public void actionPerformed(ActionEvent e)	{		run();		 textArea.setCaretPosition(textArea.getDocument().getLength());	}}