Server exit

Question

I want to create a program that you can use the send as many times you like:
That it don't exit after it's first message.
Server code:
import java.io.*;
import java.net.*;
import java.awt.*;
public class echo3 {
    public static void main(String args[]) throws AWTException,IOException {
                    Robot robot = new Robot();
        int x = 0;
                    int w = 0;
        ServerSocket echoServer = null;
        String line;
        DataInputStream is;
        PrintStream os;
        Socket clientSocket = null;
        try {
           echoServer = new ServerSocket(9999);
        catch (IOException e) {
           System.out.println(e);
try {
           clientSocket = echoServer.accept();
           is = new DataInputStream(clientSocket.getInputStream());
           os = new PrintStream(clientSocket.getOutputStream());
           while (true) {
             line = is.readLine();
             os.println(line);
catch (IOException e) {
           System.out.println(e);
}Client code:
import java.io.*;
import java.net.*;
public class smtpClient {
    public static void main(String[] args) {
        int x = 1;
        Socket smtpSocket = null; 
        DataOutputStream os = null;
        DataInputStream is = null;
        try {
            smtpSocket = new Socket("127.0.0.1", 9999);
            os = new DataOutputStream(smtpSocket.getOutputStream());
            is = new DataInputStream(smtpSocket.getInputStream());
        } catch (UnknownHostException e) {
            System.err.println("Don't know about host: hostname");
        } catch (IOException e) {
            System.err.println("Couldn't get I/O for the connection to: hostname");
if (smtpSocket != null && os != null && is != null) {
            try {
                         os.writeBytes("ENTER\n");
                String responseLine;
                responseLine = is.readLine();
                    System.out.println("Server: " + responseLine);
os.close();
                is.close();
smtpSocket.close();
            } catch (UnknownHostException e) {
                System.err.println("Trying to connect to unknown host: " + e);
            } catch (IOException e) {
                System.err.println("IOException:  " + e);
}

Answer 1

Ok, what problem are you having?
And -
Why does your Server code use the Robot class?
And (more to your point)
How do you expect to not "exit after it's[sic] first message" without any sort of loop?
Lee