sockets in applet

[RAGUNATH RAVICHANDRAN]

wrote a program for socket communication in applet
but the connection cannot be established .
there is no response from the applet.
found no problem in application programming.

anyone can tell me why this happens.

[Ulf Dittmer]

Is the applet initialized properly? Are there any messages in the Java Console?

Also be aware that applets can normally only connect to the host where they are served from, not any other host. There are workarounds, though.

[RAGUNATH RAVICHANDRAN]

Originally posted by Ulf Dittmer:
Is the applet initialized properly? Are there any messages in the Java Console?

Also be aware that applets can normally only connect to the host where they are served from, not any other host. There are workarounds, though.

yaeh i established socket connection inside applet.
but when i used any text boxes in side the applet its not working.
i have attached two programs just rectify it.
.........................
client program
..............

import java.awt.*;
import java.net.*;
import javax.swing.*;
import java.io.*;
//<applet code=client.java width=400 height=400 ></applet>
 
public class client extends JApplet
{
String str;
Socket s;
DataOutputStream out;
JTextField field1;
Container conter=getContentPane();
public void init()
{
str="message from agent";
field1=new JTextField(20);
}
 
public void start()
{
try
{
s=new Socket(InetAddress.getLocalHost(),1234);
out=new DataOutputStream(s.getOutputStream());
conter.add(field1);

out.writeBytes(""+str+"");
System.out.println("out.write bytes");
s.close();
}
catch(Exception E)
{
}
}
 
public void paint(Graphics g)
{
g.drawString(str,100,100);
}
 
.........................................
server program
..............
import java.awt.*;
import java.net.*;
import javax.swing.*;
import java.io.*;
//<applet code=server.java width=400 height=400 ></applet>
 
public class server extends JApplet 
{
String str;
ServerSocket ss;
Socket s;
DataInputStream in;
JTextField jtf;
Container contentPane=getContentPane();
 
public void init()
{
str="";
contentPane.setLayout(new FlowLayout());
jtf=new JTextField(15);
contentPane.add(jtf);
repaint();
}
 
public void start()
{
try
{
ss=new ServerSocket(1234);
s=ss.accept();
in=new DataInputStream(s.getInputStream());

str=in.readLine();
System.out.println("read line finished ");
s.close();
}
catch(Exception E)
{
}
}
 
public void paint(Graphics g)
{
g.drawString(str,100,100);
}
}
 

in the above program i send an declared message from client to server.
i have to send it from client text box to server's text box.
can u please help me
[ April 06, 2006: Message edited by: Ulf Dittmer ]

[Ulf Dittmer]

its not working

What does this mean? What does and does not happen according to your expectations? Tell The Details.

catch (Exception E)
{
}

This is a bad idea. How are you going to know if there are any errrors that prevent the applet from working?
[ April 06, 2006: Message edited by: Ulf Dittmer ]

[Yuan Ye]

I think you should add

   super.paint(g);  

in your paint method. That way your contentPane will be painted and your textBoxes can be painted.

[Ulf Dittmer]

Also, in Swing, you should generally override paintComponent, and not paint, like you would do in AWT.