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applet-servlet socket communication

1 reply on 1 page. Most recent reply: Oct 13, 2008 5:14 AM by Guy Guy

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gini gini

Posts: 1
Nickname: sakshi
Registered: Mar, 2006

applet-servlet socket communication

Posted: Mar 10, 2006 2:43 AM

plzz help me out to make servlet applet socket communication .I am getting null pointer exception
I am doing at tomcat5.0.28,using j2sdk1.4._03,using serialization
the code for APPLET IS AS:-

import java.awt.*;
import javax.swing.*;
import java.net.*;
import java.security.*;
import java.io.*;

public class applet extends JApplet
{
static int port;

public void init()
{
showStatus("Initialising...");
Socket sock = null;
//port=Integer.parseInt(getParameter("Port"));
ObjectOutputStream out;
ObjectInputStream in;
showStatus("Creating Socket...");
try
{
sock=new Socket(getCodeBase().getHost(),9999);
out=new ObjectOutputStream(sock.getOutputStream());
in=new ObjectInputStream(sock.getInputStream());
}
catch(Exception e)
{
showStatus("Error in opening Client Socket..."+ e.getClass().getName() + ": " + e.getMessage());
}

}//init()
}
******************************************
CODE FOR SERVLET IS:-
**************************************************
import java.awt.*;
import javax.swing.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.net.*;
import java.security.*;

public class servlet extends HttpServlet
{
ServerSocket serverSock;
Socket clientSocket;
int port=9999;
ObjectOutputStream oos;
ObjectInputStream ois;
public void init(ServletConfig sc) throws ServletException
{
super.init(sc);
try
{
serverSock = new ServerSocket(port);
}
catch (IOException e)
{
System.out.println("Could not listen on port: 6001");
}
}

public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException
{
doPost(request,response);
}

public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();

out.println("<html><head><title> HCL InfoWall </title></head>");

out.println("<APPLET CODE=applet.class WIDTH=760 HEIGHT=375>");

//out.println("<PARAM NAME=Port VALUE = 6001>");
out.println("</APPLET></HTML>");

try
{
clientSocket = serverSock.accept();
}
catch (IOException e)
{
out.println("Accept failed: 6004");
}
try{
oos=new ObjectOutputStream(clientSocket.getOutputStream());
ois=new ObjectInputStream(clientSocket.getInputStream());
}
catch(Exception e)
{
out.println("Objects in[put-output not Initialize becoz:"+e);
}
out.close();

}//doget
}//class

THANKS IN ADVANCE..PLZZ HELP ME OUT..OR SEND THE SIMPLE EXAMPLE WHICH I CAN DIRECTLY TRY OUT

THANKS AGAIN

Guy Guy

Posts: 1
Nickname: guyso
Registered: Oct, 2008

Re: applet-servlet socket communication

Posted: Oct 13, 2008 5:14 AM

hi boy try to send to content on the servlet side first

urlCon.setRequestProperty("Content-Type", "application/x-java-serialized-object");

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