Thread: frame is not opening in chat application

I'm making a chat application using client/server. I have 3 files - server, login and client.
Nothing is happening when I click the login button, It should open the client page.

I am getting an error in the client file which I think is causing the problem.

Here is the login page (some of the code is generated from netbeans because I am using a JFrame)
the problem is probably in button event handler:

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import javax.swing.JFrame;
 
public class Login extends javax.swing.JFrame implements ActionListener{
        JFrame frame1;
    /**
     * Creates new form Login
     */
    public Login() {
        initComponents();
       // frame1 = new JFrame("Login Page");
    }
 
    /**
     * 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() {
 
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        tf = new javax.swing.JTextField();
        button = new javax.swing.JButton();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
 
        jLabel1.setText("Chat Application");
 
        jLabel2.setText("Enter your login name");
 
        button.setText("Login");
        button.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                buttonActionPerformed(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(138, 138, 138)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel2)
                            .addComponent(jLabel1)))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(130, 130, 130)
                        .addComponent(tf, javax.swing.GroupLayout.PREFERRED_SIZE, 129, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(148, 148, 148)
                        .addComponent(button)))
                .addContainerGap(141, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(44, 44, 44)
                .addComponent(jLabel1)
                .addGap(70, 70, 70)
                .addComponent(jLabel2)
                .addGap(18, 18, 18)
                .addComponent(tf, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(39, 39, 39)
                .addComponent(button)
                .addContainerGap(58, Short.MAX_VALUE))
        );
 
        pack();
    }// </editor-fold>                        
 
    private void buttonActionPerformed(java.awt.event.ActionEvent evt) {                                       
 
                     public void actionPerformed(ActionEvent e){
		String name="";
		try{
			name=tf.getText();
			frame1.dispose();
			MyClient mc = new MyClient(name);
 
                }
 
                catch (IOException te){
                }
 
}
    /**
     * @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(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Login.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 Login().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JButton button;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JTextField tf;
    // End of variables declaration                   
 
 
}

here is the client page:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.ArrayList;
import java.util.Iterator;
 
 
// class is used to maintaning the list of user name
 
//class is used to received the messages
public class MyClient extends javax.swing.JFrame {
 
        Socket s,s1,s2;
	DataInputStream din;
	DataOutputStream dout;
	DataOutputStream dlout;
	DataOutputStream dout1;
	DataInputStream din1;
	String name;
        JFrame frame;
       // DefaultListModel list;
        //DefaultListModel list1;
 
 
 
    public MyClient(String name) throws IOException{
        initComponents();
 
                //list=new DefaultListModel();
		//list1=new DefaultListModel();
               // list=new JList(model);
		//list1=new JList(model1);
 
                s=new Socket("localhost",1004);	//creates a socket object
		s1=new Socket("localhost",1004);
		s2=new Socket("localhost",1004);
	    //create inputstream for a particular socket
		din=new DataInputStream(s.getInputStream());
		//create outputstream
		dout=new DataOutputStream(s.getOutputStream());
		//sending a message for login
		dout.writeUTF(name+" has Logged in");	
		dlout=new DataOutputStream(s1.getOutputStream());
		dout1=new DataOutputStream(s2.getOutputStream());
		din1=new DataInputStream(s2.getInputStream());
 
// creating a thread for maintaning the list of user name
		My1 m1=new My1(dout1,model1,name,din1);
		Thread t1=new Thread(m1);
		t1.start();			
	//creating a thread for receiving a messages
		My m=new My(din,model);
		Thread t=new Thread(m);
		t.start();
 
 
    }
 
 
          public void windowClosing(WindowEvent w){
		try{
			dlout.writeUTF(name);
			dlout.flush();	
			Thread.currentThread().sleep(1000);
			System.exit(1);
			}catch(Exception oe){}
		}
 
 
    /**
     * 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() {
 
 
    private void buttonActionPerformed(java.awt.event.ActionEvent evt) {                                       
        String str="";
			str=tf.getText();
			tf.setText("");
			str=name+": > "+str;
			try{
			dout.writeUTF(str);
			System.out.println(str);
			dout.flush();
			}catch(IOException ae){System.out.println(ae);}
    }                                      
 
    private void loutActionPerformed(java.awt.event.ActionEvent evt) {                                     
                        frame.dispose();
			try{
				 //sending the message for logout
                            dout.writeUTF(name+" has Logged out");
                            dlout.writeUTF(name);
                            dlout.flush();
                            Thread.currentThread().sleep(1000);
                            System.exit(1);
			}catch(Exception oe){}
    }                                    
 
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
 
        /* Create and display the form */
              java.awt.EventQueue.invokeLater(new Runnable() {
             public void run() {
                new MyClient().setVisible(true); //error is here
            }
  });
 
 
    }
    // Variables declaration - do not modify                     
    private javax.swing.JButton button;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JButton lout;
    private javax.swing.JList model;
    private javax.swing.JList model1;
    private javax.swing.JTextField tf;
    // End of variables declaration                   
}
class My1 implements Runnable{
	DataOutputStream dout1;
              JList model1;
	DataInputStream din1;
	String name,lname;
	ArrayList alname=new ArrayList(); //stores the list of user names
	ObjectInputStream obj; // read the list of user names
	int i=0;
 
    My1(DataOutputStream dout1, JList model1, String name, DataInputStream din1) {
                this.dout1=dout1;
		this.model1=model1;
		this.name=name;
		this.din1=din1;
    }
 
 
        @Override
	public void run(){
		try{
 
		dout1.writeUTF(name);  // write the user name in output stream
		while(true){
			obj=new ObjectInputStream(din1);
			//read the list of user names
			alname=(ArrayList)obj.readObject(); 
			if(i>0) 
                        model1.removeAll();
			Iterator i1=alname.iterator();
			System.out.println(alname);
			while(i1.hasNext()){
				lname=(String)i1.next();
				i++;
				 //add the user names in list box
				//model1.addElement(lname);
                                model1.add(lname, model1);
				}
			}
		}catch(Exception oe){}
	}
}
//class is used to received the messages
class My implements Runnable{
	DataInputStream din;
	DefaultListModel model;}
 
    My(DataInputStream din, JList list) {
                this.din=din;
		this.model=model;
    }
 
 
	public void run(){
		String str1="";
		while(true){
			try{
				str1=din.readUTF(); // receive the message
				// add the message in list box
				model.addElement(str1);
			}catch(Exception e){}
		}
	}
}

the line that is causing the error is :

 new MyClient().setVisible(true);

it says required: string, found: no arguments

when i try putting name in the brackets the error then says non static variable name cannot be referenced from a static context

I tried that. I changed the code to new MyClient(name).setVisible(true);
and the error says non static variable name cannot be referenced from a static context

ok so i changed String name to static String name; and now the error is gone
but the client page is still not displaying when i click the login button on the login page

ok the problem is the login page its not running the actionPerformed function when the button is clicked.
how can i fix this code?

Did you add an actionlistener/performed to the button?
This can be done with : Button.addActionListener(this);
(at least i thought your button was called "Button")

that is because i didnt post the 3rd file
here it is:

import java.io.*;
import java.net.*;
import java.util.*;
 
public class MyServer{
	ServerSocket ss;
	Socket s;
	ArrayList al=new ArrayList();
	ArrayList al1=new ArrayList();
	ArrayList al2=new ArrayList();
	ArrayList alname=new ArrayList();
	Socket s1,s2;
 
	MyServer()throws IOException{
            System.out.println("Server started....awaiting connections");
		ss=new ServerSocket(1004);	// create server socket
		while(true){
			s=ss.accept();	//accept the client socket
			s1=ss.accept();
			s2=ss.accept();
			al.add(s);	// add the client socket in arraylist
			al1.add(s1);
			al2.add(s2);
			System.out.println("Client is Connected");
			MyThread2 m=new MyThread2(s2,al2,alname); //new thread for maintaning the list of user name
			Thread t2=new Thread(m);
			t2.start();
 
			MyThread r=new MyThread(s,al);//new thread for receive and sending the messages
			Thread t=new Thread(r);
			t.start();
 
			MyThread1 my=new MyThread1(s1,al1,s,s2); // new thread for update the list of user name
			Thread t1=new Thread(my);
			t1.start();
		}
	}
	public static void main(String[] args){
		try{
			new MyServer();			
		}catch (IOException e){}
	}
}
//class is used to update the list of user name
class MyThread1 implements Runnable{
	Socket s1,s,s2;
	static ArrayList al1;
	DataInputStream ddin;
	String sname;
	MyThread1(Socket s1,ArrayList al1,Socket s,Socket s2){
		this.s1=s1;
		this.al1=al1;
		this.s=s;
		this.s2=s2;
	}
	public void run(){	
		try{
		ddin=new DataInputStream(s1.getInputStream());
		while(true){
		sname=ddin.readUTF();
		System.out.println("Exit  :"+sname);
		MyThread2.alname.remove(sname);//remove the logout user name from arraylist
		MyThread2.every();
		al1.remove(s1);
		MyThread.al.remove(s);
		MyThread2.al2.remove(s2);
		if(al1.isEmpty())
			System.exit(0); //all client has been logout
		}
		}catch(Exception ie){}
	}
}
 
// class is used to maintain the list of all online users
class MyThread2 implements Runnable{
	Socket s2;
	static ArrayList al2;
	static ArrayList alname;
	static DataInputStream din1;	
	static DataOutputStream dout1;
 
	MyThread2(Socket s2,ArrayList al2,ArrayList alname){
		this.s2=s2;
		this.al2=al2;
		this.alname=alname;
	}
	public void run(){
		try{
		din1= new DataInputStream(s2.getInputStream());
		alname.add(din1.readUTF());	// store the user name in arraylist
		every();
		}catch(Exception oe){System.out.println("Main expression"+oe);}
	}
	// send the list of user name to all client
	static void every()throws Exception{
		Iterator i1=al2.iterator();
		Socket st1;		
 
		while(i1.hasNext()){
			st1=(Socket)i1.next();
			dout1=new DataOutputStream(st1.getOutputStream());
			ObjectOutputStream obj=new ObjectOutputStream(dout1);
			obj.writeObject(alname); //write the list of users in stream of all clients
			dout1.flush();
			obj.flush();
		}
	}
}
//class is used to receive the message and send it to all clients
class MyThread implements Runnable{
	Socket s;
	static ArrayList al;
	DataInputStream din;
	DataOutputStream dout;
 
	MyThread(Socket s, ArrayList al){
		this.s=s;
		this.al=al;
	}
	public void run(){
		String str;
		int i=1;
		try{
		din=new DataInputStream(s.getInputStream());
		}catch(Exception e){}
 
		while(i==1){
				try{
 
					str=din.readUTF(); //read the message
					distribute(str);
				}catch (IOException e){}
			}
	}
	// send it to all clients
	public void distribute(String str)throws IOException{
		Iterator i=al.iterator();
		Socket st;
		while(i.hasNext()){
			st=(Socket)i.next();
			dout=new DataOutputStream(st.getOutputStream());
			dout.writeUTF(str);
			dout.flush();
		}
	}
}

This file (MyServer.java) needs to be run first, then the login file
I don't have any compile errors in my code

he should use an IDE like Eclipse or netbeans

I am using netbeans

--- Update ---

i got this code from a website. here is the orginal code:
i

mport javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
 
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
 
// Login class which takes a user name and passed it to client class
public class Login implements ActionListener{
	JFrame frame1;
	JTextField tf;
	JButton button;
	JLabel heading;
	JLabel label;
	public static void main(String[] args){
		new Login();
	}
	public Login(){
		frame1 = new JFrame("Login Page");
		tf=new JTextField();
		button=new JButton("Login");
		heading=new JLabel("Chat Server");
		heading.setFont(new Font("Impact", Font.BOLD,40));
		label=new JLabel("Enter you Login Name");
		label.setFont(new Font("Serif", Font.PLAIN, 24));
		JPanel panel = new JPanel();
		button.addActionListener(this);
		panel.add(heading);panel.add(tf);panel.add(label);
		panel.add(button);
		heading.setBounds(30,20,280,80);
		label.setBounds(20,100,250,60);
		tf.setBounds(50,150,150,30);
		button.setBounds(70,200,90,30);
		frame1.add(panel);
		panel.setLayout(null);
		frame1.setSize(300, 300);
                frame1.setVisible(true);
		frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	// pass the user name to MyClient class
	public void actionPerformed(ActionEvent e){
		String name="";
		try{
			name=tf.getText();
			frame1.dispose();
			MyClient mc=new MyClient(name);
		}catch (IOException te){}
	}
}

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.ArrayList;
import java.util.Iterator;
 
//create the GUI of the client side
public class MyClient extends WindowAdapter implements ActionListener{
	JFrame frame;
	JList list;
	JList list1;
	JTextField tf;
	DefaultListModel model;
	DefaultListModel model1;
	JButton button;
	JButton lout;
	JScrollPane scrollpane;
	JScrollPane scrollpane1;
	JLabel label;
	Socket s,s1,s2;
	DataInputStream din;
	DataOutputStream dout;
	DataOutputStream dlout;
	DataOutputStream dout1;
	DataInputStream din1;
	String name;
 
	MyClient(String name)throws IOException{
		frame = new JFrame("Client Side");
		tf=new JTextField();
		model=new DefaultListModel();
		model1=new DefaultListModel();
		label=new JLabel("Message");
		list=new JList(model);
		list1=new JList(model1);
		button=new JButton("Send");
		lout=new JButton("Logout");
		scrollpane=new JScrollPane(list);
		scrollpane1=new JScrollPane(list1);
		JPanel panel = new JPanel();
		button.addActionListener(this);
		lout.addActionListener(this);
		panel.add(tf);panel.add(button);panel.add(scrollpane);
		panel.add(label);panel.add(lout);
		panel.add(scrollpane1);
		scrollpane.setBounds(10,20,180,150);
		scrollpane1.setBounds(250,20,100,150);
		label.setBounds(20,180,80,30);
		tf.setBounds(100,180,140,30);
		button.setBounds(260,180,90,30);
		lout.setBounds(260,230,90,30);
		frame.add(panel);
		panel.setLayout(null);
		frame.setSize(400, 400);
	   	frame.setVisible(true);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.name=name;
		frame.addWindowListener(this);
 
		s=new Socket("localhost",1004);	//creates a socket object
		s1=new Socket("localhost",1004);
		s2=new Socket("localhost",1004);
	    //create inputstream for a particular socket
		din=new DataInputStream(s.getInputStream());
		//create outputstream
		dout=new DataOutputStream(s.getOutputStream());
		//sending a message for login
		dout.writeUTF(name+" has Logged in");	
		dlout=new DataOutputStream(s1.getOutputStream());
		dout1=new DataOutputStream(s2.getOutputStream());
		din1=new DataInputStream(s2.getInputStream());
 
// creating a thread for maintaning the list of user name
		My1 m1=new My1(dout1,model1,name,din1);
		Thread t1=new Thread(m1);
		t1.start();			
	//creating a thread for receiving a messages
		My m=new My(din,model);
		Thread t=new Thread(m);
		t.start();
  	}
	public void actionPerformed(ActionEvent e){
		// sending the messages
		if(e.getSource()==button){	
			String str="";
			str=tf.getText();
			tf.setText("");
			str=name+": > "+str;
			try{
			dout.writeUTF(str);
			System.out.println(str);
			dout.flush();
			}catch(IOException ae){System.out.println(ae);}
		}
		// client logout
		if (e.getSource()==lout){
			frame.dispose();
			try{
				 //sending the message for logout
			dout.writeUTF(name+" has Logged out");
			dlout.writeUTF(name);
			dlout.flush();
			Thread.currentThread().sleep(1000);
			System.exit(1);
			}catch(Exception oe){}
		}
	}
	public void windowClosing(WindowEvent w){
		try{
			dlout.writeUTF(name);
			dlout.flush();	
			Thread.currentThread().sleep(1000);
			System.exit(1);
			}catch(Exception oe){}
		}
}
 
// class is used to maintaning the list of user name
class My1 implements Runnable{
	DataOutputStream dout1;
	DefaultListModel model1;	
	DataInputStream din1;
	String name,lname;
	ArrayList alname=new ArrayList(); //stores the list of user names
	ObjectInputStream obj; // read the list of user names
	int i=0;
	My1(DataOutputStream dout1,DefaultListModel model1,String name,DataInputStream din1){
		this.dout1=dout1;
		this.model1=model1;
		this.name=name;
		this.din1=din1;
	}
	public void run(){
		try{
		dout1.writeUTF(name);  // write the user name in output stream
		while(true){
			obj=new ObjectInputStream(din1);
			//read the list of user names
			alname=(ArrayList)obj.readObject(); 
			if(i>0)
			model1.clear(); 
			Iterator i1=alname.iterator();
			System.out.println(alname);
			while(i1.hasNext()){
				lname=(String)i1.next();
				i++;
				 //add the user names in list box
				model1.addElement(lname);
				}
			}
		}catch(Exception oe){}
	}
}
//class is used to received the messages
class My implements Runnable{
	DataInputStream din;
	DefaultListModel model;
	My(DataInputStream din, DefaultListModel model){
		this.din=din;
		this.model=model;
	}
	public void run(){
		String str1="";
		while(true){
			try{
				str1=din.readUTF(); // receive the message
				// add the message in list box
				model.addElement(str1);
			}catch(Exception e){}
		}
	}
}

I was trying to put this code into a JFrame and use event handlers for the buttons

yes i did test it and it worked. thats why i started making the changes because the code was fine

yes but that code is already altered by him

sorry i though you mean't the code i just posted a minute ago - that code is fine. maybe compare the two and see whats the problem?
i didnt change any of the code. i just want the code to work using a JFrame and the button event handlers

ok here is all 3 files (sorry for all the extra stuff netbeans puts in):

import java.io.*;
import java.net.*;
import java.util.*;
 
public class MyServer{
	ServerSocket ss;
	Socket s;
	ArrayList al=new ArrayList();
	ArrayList al1=new ArrayList();
	ArrayList al2=new ArrayList();
	ArrayList alname=new ArrayList();
	Socket s1,s2;
 
	MyServer()throws IOException{
            System.out.println("Server started....awaiting connections");
		ss=new ServerSocket(1004);	// create server socket
		while(true){
			s=ss.accept();	//accept the client socket
			s1=ss.accept();
			s2=ss.accept();
			al.add(s);	// add the client socket in arraylist
			al1.add(s1);
			al2.add(s2);
			System.out.println("Client is Connected");
			MyThread2 m=new MyThread2(s2,al2,alname); //new thread for maintaning the list of user name
			Thread t2=new Thread(m);
			t2.start();
 
			MyThread r=new MyThread(s,al);//new thread for receive and sending the messages
			Thread t=new Thread(r);
			t.start();
 
			MyThread1 my=new MyThread1(s1,al1,s,s2); // new thread for update the list of user name
			Thread t1=new Thread(my);
			t1.start();
		}
	}
	public static void main(String[] args){
		try{
			new MyServer();			
		}catch (IOException e){}
	}
}
//class is used to update the list of user name
class MyThread1 implements Runnable{
	Socket s1,s,s2;
	static ArrayList al1;
	DataInputStream ddin;
	String sname;
	MyThread1(Socket s1,ArrayList al1,Socket s,Socket s2){
		this.s1=s1;
		this.al1=al1;
		this.s=s;
		this.s2=s2;
	}
	public void run(){	
		try{
		ddin=new DataInputStream(s1.getInputStream());
		while(true){
		sname=ddin.readUTF();
		System.out.println("Exit  :"+sname);
		MyThread2.alname.remove(sname);//remove the logout user name from arraylist
		MyThread2.every();
		al1.remove(s1);
		MyThread.al.remove(s);
		MyThread2.al2.remove(s2);
		if(al1.isEmpty())
			System.exit(0); //all client has been logout
		}
		}catch(Exception ie){}
	}
}
 
// class is used to maintain the list of all online users
class MyThread2 implements Runnable{
	Socket s2;
	static ArrayList al2;
	static ArrayList alname;
	static DataInputStream din1;	
	static DataOutputStream dout1;
 
	MyThread2(Socket s2,ArrayList al2,ArrayList alname){
		this.s2=s2;
		this.al2=al2;
		this.alname=alname;
	}
	public void run(){
		try{
		din1= new DataInputStream(s2.getInputStream());
		alname.add(din1.readUTF());	// store the user name in arraylist
		every();
		}catch(Exception oe){System.out.println("Main expression"+oe);}
	}
	// send the list of user name to all client
	static void every()throws Exception{
		Iterator i1=al2.iterator();
		Socket st1;		
 
		while(i1.hasNext()){
			st1=(Socket)i1.next();
			dout1=new DataOutputStream(st1.getOutputStream());
			ObjectOutputStream obj=new ObjectOutputStream(dout1);
			obj.writeObject(alname); //write the list of users in stream of all clients
			dout1.flush();
			obj.flush();
		}
	}
}
//class is used to receive the message and send it to all clients
class MyThread implements Runnable{
	Socket s;
	static ArrayList al;
	DataInputStream din;
	DataOutputStream dout;
 
	MyThread(Socket s, ArrayList al){
		this.s=s;
		this.al=al;
	}
	public void run(){
		String str;
		int i=1;
		try{
		din=new DataInputStream(s.getInputStream());
		}catch(Exception e){}
 
		while(i==1){
				try{
 
					str=din.readUTF(); //read the message
					distribute(str);
				}catch (IOException e){}
			}
	}
	// send it to all clients
	public void distribute(String str)throws IOException{
		Iterator i=al.iterator();
		Socket st;
		while(i.hasNext()){
			st=(Socket)i.next();
			dout=new DataOutputStream(st.getOutputStream());
			dout.writeUTF(str);
			dout.flush();
		}
	}
}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import javax.swing.JFrame;
 
 
public class Login extends javax.swing.JFrame implements ActionListener{
        JFrame frame1;
    /**
     * Creates new form Login
     */
    public Login() {
        initComponents();
       // frame1 = new JFrame("Login Page");
    }
 
    /**
     * 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() {
 
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        tf = new javax.swing.JTextField();
        button = new javax.swing.JButton();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
 
        jLabel1.setText("Chat Application");
 
        jLabel2.setText("Enter your login name");
 
        button.setText("Login");
        button.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                buttonActionPerformed(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(138, 138, 138)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel2)
                            .addComponent(jLabel1)))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(130, 130, 130)
                        .addComponent(tf, javax.swing.GroupLayout.PREFERRED_SIZE, 129, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(148, 148, 148)
                        .addComponent(button)))
                .addContainerGap(141, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(44, 44, 44)
                .addComponent(jLabel1)
                .addGap(70, 70, 70)
                .addComponent(jLabel2)
                .addGap(18, 18, 18)
                .addComponent(tf, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(39, 39, 39)
                .addComponent(button)
                .addContainerGap(58, Short.MAX_VALUE))
        );
 
        pack();
    }// </editor-fold>                        
 
    private void buttonActionPerformed(java.awt.event.ActionEvent evt) {                                       
//        // pass the user name to MyClient class
//        String name="";
//		try{
//			name=tf.getText();
//			frame1.dispose();
//			MyClient mc=new MyClient(name);
//		}catch (IOException te){}
    }                                      
 
 
    public void actionPerformed(ActionEvent e){
		String name="";
		try{
			name=tf.getText();
			frame1.dispose();
			MyClient mc=new MyClient(name);
 
                }
 
                catch (IOException te){
                }
 
}
    /**
     * @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(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Login.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Login.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 Login().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JButton button;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JTextField tf;
    // End of variables declaration                   
 
 
}

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.logging.Level;
import java.util.logging.Logger;
 
 
// class is used to maintaning the list of user name
 
//class is used to received the messages
public class MyClient extends javax.swing.JFrame {
 
        Socket s,s1,s2;
	DataInputStream din;
	DataOutputStream dout;
	DataOutputStream dlout;
	DataOutputStream dout1;
	DataInputStream din1;
	static String name;
        JFrame frame;
       // DefaultListModel list;
        //DefaultListModel list1;
 
 
 
    public MyClient(String name) throws IOException{
        initComponents();
                //list=new DefaultListModel();
		//list1=new DefaultListModel();
               // list=new JList(model);
		//list1=new JList(model1);
 
                s=new Socket("localhost",1004);	//creates a socket object
		s1=new Socket("localhost",1004);
		s2=new Socket("localhost",1004);
	    //create inputstream for a particular socket
		din=new DataInputStream(s.getInputStream());
		//create outputstream
		dout=new DataOutputStream(s.getOutputStream());
		//sending a message for login
		dout.writeUTF(name+" has Logged in");	
		dlout=new DataOutputStream(s1.getOutputStream());
		dout1=new DataOutputStream(s2.getOutputStream());
		din1=new DataInputStream(s2.getInputStream());
 
// creating a thread for maintaning the list of user name
		My1 m1=new My1(dout1,model1,name,din1);
		Thread t1=new Thread(m1);
		t1.start();			
	//creating a thread for receiving a messages
		My m=new My(din,model);
		Thread t=new Thread(m);
		t.start();
 
 
    }
 
 
          public void windowClosing(WindowEvent w){
		try{
			dlout.writeUTF(name);
			dlout.flush();	
			Thread.currentThread().sleep(1000);
			System.exit(1);
			}
                catch(Exception oe){}
		}
 
 
    /**
     * 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() {
 
        button = new javax.swing.JButton();
        lout = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        tf = new javax.swing.JTextField();
        jScrollPane1 = new javax.swing.JScrollPane();
        model = new javax.swing.JList();
        jScrollPane2 = new javax.swing.JScrollPane();
        model1 = new javax.swing.JList();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
 
        button.setText("Send");
        button.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                buttonActionPerformed(evt);
            }
        });
 
        lout.setText("Logout");
        lout.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                loutActionPerformed(evt);
            }
        });
 
        jLabel1.setText("message:");
 
        jScrollPane1.setViewportView(model);
 
        jScrollPane2.setViewportView(model1);
 
        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()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(lout))
                    .addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
                        .addGap(25, 25, 25)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(jLabel1)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(tf, javax.swing.GroupLayout.PREFERRED_SIZE, 139, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 98, Short.MAX_VALUE)
                                .addComponent(button))
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 115, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 67, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(28, 28, 28)))))
                .addGap(25, 25, 25))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 61, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(button)
                    .addComponent(jLabel1)
                    .addComponent(tf, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addComponent(lout)
                .addGap(34, 34, 34))
        );
 
        pack();
    }// </editor-fold>                        
 
    private void buttonActionPerformed(java.awt.event.ActionEvent evt) {                                       
        String str="";
			str=tf.getText();
			tf.setText("");
			str=name+": > "+str;
			try{
			dout.writeUTF(str);
			System.out.println(str);
			dout.flush();
			}
                        catch(IOException ae){
                            System.out.println(ae);}
    }                                      
 
    private void loutActionPerformed(java.awt.event.ActionEvent evt) {                                     
                        frame.dispose();
			try{
				 //sending the message for logout
                            dout.writeUTF(name+" has Logged out");
                            dlout.writeUTF(name);
                            dlout.flush();
                            Thread.currentThread().sleep(1000);
                            System.exit(1);
			}
                        catch(Exception oe){}
    }                                    
 
    /**
     * @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(MyClient.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(MyClient.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(MyClient.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(MyClient.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() {
                      try {
                          new MyClient(name).setVisible(true);
                      } catch (IOException ex) {
                          //Logger.getLogger(MyClient.class.getName()).log(Level.SEVERE, null, ex);
                      }
            }
  });
 
 
    }
    // Variables declaration - do not modify                     
    private javax.swing.JButton button;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JButton lout;
    private javax.swing.JList model;
    private javax.swing.JList model1;
    private javax.swing.JTextField tf;
    // End of variables declaration                   
}
class My1 implements Runnable{
	DataOutputStream dout1;
	//DefaultListModel model1;
        JList model1;
	DataInputStream din1;
	String name,lname;
	ArrayList alname=new ArrayList(); //stores the list of user names
	ObjectInputStream obj; // read the list of user names
	int i=0;
//	My1(DataOutputStream dout1,DefaultListModel model1,String name,DataInputStream din1){
//		this.dout1=dout1;
//		this.model1=model1;
//		this.name=name;
//		this.din1=din1;
//	}
 
    My1(DataOutputStream dout1, JList model1, String name, DataInputStream din1) {
                this.dout1=dout1;
		this.model1=model1;
		this.name=name;
		this.din1=din1;
    }
 
 
        @Override
	public void run(){
		try{
                     new MyClient(name).setVisible(true);
 
		dout1.writeUTF(name);  // write the user name in output stream
		while(true){
			obj=new ObjectInputStream(din1);
			//read the list of user names
			alname=(ArrayList)obj.readObject(); 
			if(i>0) 
                        //model1.clear();
                        model1.removeAll();
			Iterator i1=alname.iterator();
			System.out.println(alname);
			while(i1.hasNext()){
				lname=(String)i1.next();
				i++;
				 //add the user names in list box
				//model1.addElement(lname);
                                model1.add(lname, model1);
				}
			}
		}catch(Exception oe){}
	}
}
//class is used to received the messages
class My implements Runnable{
	DataInputStream din;
	DefaultListModel model;
 
//	My(DataInputStream din, DefaultListModel model){
//		this.din=din;
//		this.model=model;
//	}
 
    My(DataInputStream din, JList list) {
                this.din=din;
		this.model=model;
    }
 
 
	public void run(){
		String str1="";
		while(true){
			try{
				str1=din.readUTF(); // receive the message
				// add the message in list box
				model.addElement(str1);
			}
                        catch(Exception e){}
		}
	}
}

so like i said the problem is when i click login from the login page the client page isn't opening

i have attached the files

and here is the orignal file where i got the code.
bascially all i want to do is take this file and put the code into a JFrame so its easier to add more features and move things around