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Sample Serialized Object Transfer

Posted on 1998-08-17
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Last Modified: 2010-03-30
Could someone show some code on serializing a class across a socket?
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Question by:jvb73
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3 Comments
 
LVL 3

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mjenkins earned 480 total points
ID: 1221969
Here's a quickie example I have laying around.

import java.net.*;
import java.io.*;
 
public class Client
{
        Socket s;
 
        public static void main( String args[] )
        {
                Client c = new Client();
                c.sendObject();
                c.close();
                System.out.println( "Done Sending" );
        }
 
        public Client()
        {
                try
                {
                        s = new Socket( "localhost", 10888 );
                }
                catch( Exception e )
                {
                        e.printStackTrace();
                        System.exit(0);
                }
        }
 
        public void sendObject()
        {
                try
                {
                        OutputStream out = s.getOutputStream();
                        ObjectOutputStream output = new ObjectOutputStream( out );
                        output.writeObject(new Character('a'));
                        output.writeObject(new Long(12345));
                        output.writeObject(new Double(123.456));
                        output.flush();
                        output.close();
                }
                catch( IOException e )
                {
                        e.printStackTrace();
                }
        }
 
        public void close()
        {
                try
                {
                        s.close();
                }
                catch( Exception e )
                {
                        e.printStackTrace();
                        System.exit(0);
                }
        }
}

import java.net.*;
import java.io.*;
 
public class Server
{
        ServerSocket s;
 
        public static void main( String args[] )
        {
                Server c = new Server();
                c.recvObject();
                System.out.println( "Done Recieving" );
        }
 
        public Server()
        {
                try
                {
                        s = new ServerSocket( 10888, 10 );
                }
                catch( Exception e )
                {
                        e.printStackTrace();
                        System.exit(0);
                }
        }
 
        public void recvObject()
        {
 
                try
                {
                        Socket s1 = s.accept();
                        InputStream in = s1.getInputStream();
                        ObjectInputStream input = new ObjectInputStream( in );
                        Character c = (Character)input.readObject();
                        Long l = (Long)input.readObject();
                        Double d = (Double)input.readObject();
                        input.close();
                        s1.close();
                        System.out.println( "SERVER RECIEVED: " + c + " " + l + " " + d );
                }
                catch( Exception e )
                {
                        e.printStackTrace();
                }
        }
}

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Author Comment

by:jvb73
ID: 1221970
Thank you that was very fast. Why Character, Long , Double?
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LVL 3

Expert Comment

by:mjenkins
ID: 1221971
It was from an example I gave for a different question. I just copies the source I had.
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