Simple network programming, question ...

Question

Hello
I'm a beginning learning student from the Netherlands.
My clientcode looks like this:
import java.io.*;
import java.net.*;
import java.util.*;
public class ConsumerClient
private static InetAddress host;
private static final int PORT = 1234;
public static void main(String[] args)
try
host = InetAddress.getLocalHost();
catch(UnknownHostException uhEx)
System.out.println("\nHost ID not found!\n");
System.exit(1);
sendMessages();
private static void sendMessages()
Socket socket = null;
try
socket = new Socket(host, PORT);
Scanner networkInput = new Scanner(socket.getInputStream());
PrintWriter networkOutput = new PrintWriter(socket.getOutputStream(),true);
//Set up stream for keyboard entry...
Scanner userEntry = new Scanner(System.in);
String message, response;
do
System.out.print("Enter 1 for resource or 0 to quit: ");
message = userEntry.nextLine();
networkOutput.println(message);
if (message.equals("0") || message.equals("1"))
response = networkInput.nextLine();
System.out.println("\nSERVER> " + response);
else
System.out.println("*** Invalid! ***\n");
while (!message.equals("0"));
catch(IOException ioEx)
ioEx.printStackTrace();
finally
try
System.out.println("\nClosing connection...");
socket.close();
catch(IOException ioEx)
System.out.println("Unable to disconnect!");
System.exit(1);
I've also created a server.
When I start the client server program, the following error occurs at line:
response = networkInput.nextLine();
NoSuchElementException:
No line found (in java.util.Scanner)
does someone know how to solve this problem?
thanks in advance
greetings
Bastiaan

Answer 1

I think the socket you're connecting to ( server ) didn't send data to your socket. So that the method networkInput.nextLine(); returns null and the exception occured