Socket Programming 1-echoclient

The talk () method continuously reads the string that the user entered from the console, sends it to echoserver, and prints the string returned by Echoserver to the console. If the user enters a string of "bye", it ends the communication with Echoserver and closes the socket connection.

Package Chapter1;

Import Java.io.BufferedReader;
Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.InputStreamReader;
Import Java.io.OutputStream;
Import Java.io.PrintWriter;
Import Java.net.Socket;

public class Echoclient {
String host = "localhost";
int port = 8000;
Socket socket;

    public static void Main (string[] args) {
        try {
            new Echoclient (). talk ();
       } catch (Exception e) {
             System.out.println ("Access exception");
       }
   }

Public Echoclient () {
try {
Socket = new Socket (host, port);
SYSTEM.OUT.PRINTLN ("Client program start Access");
SYSTEM.OUT.PRINTLN ("Client Talk, Port number:" + socket.getlocalport ());
} catch (IOException e) {
System.out.println ("Unable to access specified port number" + port);
}
}

public void Talk () {
try {
if (socket! = NULL) {
System.out.println ("----------------\ n" + "Please Enter transmission information:");
Read to keyboard input characters via input stream
InputStreamReader sysin = new InputStreamReader (system.in);
BufferedReader localreader = new BufferedReader (sysin);
String msg = Localreader.readline ();
Using the output stream to the server-side socket
PrintWriter pw = getwriter (socket);
PW.PRINTLN (msg);
Reads the contents returned by the server side through the input stream
BufferedReader br = getreader (socket);
If the server side returns over, the socket is closed, and if you do not return over, continue talk ()
String Response=br.readline ();
if (Response.equals ("Over") | | Response.equals ("Echobye")) {
Socket.close ();
SYSTEM.OUT.PRINTLN ("Receive server-side return \" Over\ ", client closes socket");
} else {
SYSTEM.OUT.PRINTLN ("Get Server-side return:" + response);
Talk ();
}
}
} catch (IOException e) {
System.out.println ("Talk Method exception");
}
}

Private BufferedReader Getreader (socket socket) throws IOException {
InputStream socketin = Socket.getinputstream ();
BufferedReader br = new BufferedReader (new InputStreamReader (Socketin));
return BR;
}

Private PrintWriter getwriter (socket socket) throws IOException {
OutputStream socketout = Socket.getoutputstream ();
PrintWriter pw = new PrintWriter (Socketout, true);
return PW;
}
}

Socket Programming 1-echoclient