Hi,
i am doing a project based on client / server, in this i made a GUI with add, remove button using hashtable. not database is used in the program. i am unable to send data from client to server.
i am giving my code below please help me in getting the solution.

CLIENT.java

import java.io.*;

import java.awt.*;

import java.awt.event.*;

import java.net.*;

import javax.swing.*;

import java.util.*;



public class Client extends JFrame

{



private static final int PORT_NUM = 5234;

private static String address;

String username;



JButton remove, list, add, close;

JLabel Member;

JTextField member;

Socket client = null;

ObjectInputStream input = null;

PrintStream output = null;

MyObject my = new MyObject(12);



public Client()

{

super("Client");



//added here

Member = new JLabel("Member");

getContentPane().add(Member);

member = new JTextField(20);

getContentPane().add(member);



//end



remove = new JButton("REMOVE");

list = new JButton("LIST");

add = new JButton("ADD");

close = new JButton("CLOSE");

Container c = getContentPane();



c.add(add);

c.add(remove);

c.add(list);

c.add(close);

c.setLayout(new FlowLayout());



/* */



/* try

{

client=new Socket(InetAddress.getByName("192.9.200.120"),PORT_NUM);

input=new ObjectInputStream(client.getInputStream());

output=new PrintStream(client.getOutputStream());

}

catch(Exception e)

{

System.out.println("Accept Failed: 1001");

System.exit(-1);

}*/

setSize(500, 500);

setVisible(true);

addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {

System.exit(0);

}

});

add.addActionListener(new ActionListener());

close.addActionListener();

list.addActionListener();

remove.addActionListener();

}



public void actionPerformed(ActionEvent e1) {

JButton button = (JButton) e1.getSource();

if (button.equals(close))

{

this.dispose(); //close the current frame

}

else if (button.equals(add)) {

username = member.getText();

my.addMem(username);

}

else if (button.equals(remove)) {

username = member.getText();

my.removeMember(Integer.parseInt(username));

}

else if (button.equals(list))

{

Enumeration e=my.getAllMembers();

}

}



public void runClient()

{

try {

client = new Socket(InetAddress.getByName("192.9.200.120"), PORT_NUM);



output.println("Created Socket
");

input = new ObjectInputStream(client.getInputStream());

//client.close();

}

catch (IOException e) {

e.printStackTrace();

}

}



public static void main(String args[]) {

if (args.length != 1) {

System.out.println("
Usage: java Client server_address");

System.exit(0);

}

Client c = new Client();

c.address = args[0];

c.runClient();

}

}



 

ClubMember.java







New Page 3

public class ClubMember {



// Instance Variables

private String memName;

private int memNumber;



// Static class Variable

public static int membershipNumber=0;



//Constructor

ClubMember(String nam){

memName = nam;

memNumber = membershipNumber++;

}



// Methods

public String getName(){

return memName;

}



public int getNumber(){

return memNumber;

}





public String toString(){

return ("ClubMember: Name=" + memName + " Number=" + memNumber);

}



}







 

MyObject.java

import java.io.*;
import java.util.*;
public class MyObject implements Serializable
{
private String name;
private int number,max;
private Hashtable members;
public MyObject(int size)
{
members=new Hashtable();
max=size;
}
public void addMem(String name)
{
if(getNumbMembers()>=getMaxNumbMembers())
{
ClubMember newone = new ClubMember(name);
members.put(new Integer(newone.getNumber()), newone);
}
}

public Enumeration getAllMembers()
{
return members.elements();
}

public void removeMember( int number )
{
members.remove(new Integer(number));
}

public int getNumbMembers()
{
return members.size();
}

public int getMaxNumbMembers()
{
return max;
}


}





Server.java

import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;

public class Server extends Frame
{
private static final int PORT_NUM=5234;
private static final int Q_LENGTH=5;
TextArea display;
ServerSocket server;
Socket connection;
OutputStream output;
Thread serverThread;

public Server()
{
super("Server");
display = new TextArea(20,5);
add("Center", display);
setSize(300,150);
setVisible(true);
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
try
{
server=new ServerSocket(PORT_NUM, Q_LENGTH);
serverThread=new Thread();
serverThread.start();
display.setText("CONNECTION SUCCESSFUL");
display.append("Sending Message:
. CONNECTION SUCCESSFUL
");
//output=connection.getOutputStream();
String s= new String("CONNECTION SUCCESSFUL
");
for(int i=0;i
output.write((int)s.charAt(i));
// display.append("Transmission Complete. Closing socket.
");
// connection.close();
}
catch(IOException e)
{
e.printStackTrace();
}

}
/* public void runServer()
{
try
{
server=new ServerSocket(PORT_NUM, Q_LENGTH);
connection=server.accept();
display.setText("CONNECTION SUCCESSFUL");
display.append("Sending Message:
. CONNECTION SUCCESSFUL
");
output=connection.getOutputStream();
String s= new String("CONNECTION SUCCESSFUL
");
for(int i=0;i
output.write((int)s.charAt(i));
// display.append("Transmission Complete. Closing socket.
");
// connection.close();
}
catch(IOException e)
{
e.printStackTrace();
}
}*/
public static void main(String args[])
{
new Server();
//s.runServer();
}
public void run()
{
try{
while(true)
{
connection=server.accept();
}
}catch(Exception exe)
{
System.out.println("can't listen to the client"+exe);
}

}
}    <<Less