Network Programming for Java Learning

Package com. java. suting;

Import java. Io. ioexception;
Import java. Io. inputstream;
Import java.net. Socket;
Import java. util. collections;

Public class sockettest {
 
Public static void main (string [] ARGs ){

Try {
// Create a socket
Socket S = new socket ("java.sun.com", 80 );
Try {

Inputstream instream = S. getinputstream ();
Vertex in = new vertex (instream );

While (in. hasnextline ()){
String line = in. nextline ();
System. Out. println (line );
}
}
Finally
{
// Close a socket
S. Close ();
}
}
Catch (ioexception e ){

E. printstacktrace ();
}
}
}

 

 

 

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Package com. java. suting;

Import java. Io .*;
Import java.net .*;
Import java. util .*;

/*
* This program implements a simple server to port 8189 and echoes back
* All client input.
*/

Public class echoserver {
 
Public static void main (string [] ARGs ){

Try {

// Establish server socket
Serversocket S = new serversocket (8189 );

// Wait for client connection
Socket incoming = S. Accept ();

Try {
// Instream receives the input from the client, and outstream outputs the data to the client
Inputstream instream = incoming. getinputstream ();
Outputstream outstream = incoming. getoutputstream ();

Vertex in = new vertex (instream );
Printwriter out = new printwriter (outstream, true/* autoflush */);

Out. println ("heloo enter bye to exit .");

// Echo client input
Boolean done = false;
While (! Done & in. hasnextline ())
{

String line = in. nextline ();
Out. println ("Echo:" + line );
If (line. Trim (). Equals ("bye "))
Done = true;
}
}
Finally
{
Incoming. Close ();
}
}
Catch (ioexception e ){

E. printstacktrace ();
}
}
}

 

 

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Package com. java. suting;

Import java. Io .*;
Import java.net .*;
Import java. util .*;

/*
* This program implements a Multithread server that listens to Port
* 8189 and echoes back all client input
*/

Public class threadechoserver {
 
Public static void main (string [] ARGs ){

Try {

Int I = 1;
Serversocket S = new serversocket (8189 );

While (true ){

Socket incoming = S. Accept ();
System. Out. println ("spawing" + I );
// Create a thread
Runnable r = new threadedechohandler (incoming, I );
Thread t = new thread (R );

T. Start ();
I ++;
}
}
Catch (ioexception e ){

E. printstacktrace ();
}
}
}

/*
* This class handles the client input for one server socket connection
*
*/
Class threadedechohandler implements runnable {

 
/*
* Constructor
*/
Public threadedechohandler (socket I, int c ){

Incoming = I;
Counter = C;
}
 
 
@ Override
Public void run (){
// Todo auto-generated method stub

Try {
Try {
// Instream receives the input from the client, and outstream outputs the data to the client
Inputstream instream = incoming. getinputstream ();
Outputstream outstream = incoming. getoutputstream ();

Vertex in = new vertex (instream );
Printwriter out = new printwriter (outstream, true/* autoflush */);

Out. println ("heloo enter bye to exit .");

// Echo client input
Boolean done = false;
While (! Done & in. hasnextline ())
{

String line = in. nextline ();
Out. println ("Echo:" + line );
If (line. Trim (). Equals ("bye "))
Done = true;
}
}
Finally
{
Incoming. Close ();
}
}
Catch (ioexception e ){

E. printstacktrace ();
}
}
 
Private socket incoming;
Private int counter;
}

 

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