import java.io.*;import java.net.*;public class EchoClient {    public static void main(String[] args) throws IOException {        Socket echoSocket = null;        DataOutputStream out = null;        DataInputStream in = null;        try {            echoSocket = new Socket("taranis", 7);            out = new DataOutputStream(echoSocket.getOutputStream());            in = new DataInputStream(echoSocket.getInputStream());        } catch (UnknownHostException e) {            System.err.println("Don't know about host: taranis.");            System.exit(1);        } catch (IOException e) {            System.err.println("Couldn't get I/O for the connection to: taranis.");            System.exit(1);        }	DataInputStream stdIn = new DataInputStream(System.in);	String userInput;	while ((userInput = stdIn.readLine()) != null) {	    out.writeBytes(userInput);	    out.writeByte('\n');	    System.out.println("echo: " + in.readLine());	}	out.close();	in.close();	stdIn.close();	echoSocket.close();    }}