import java.io.*;
          import java.net.*;

          public class EchoTest {
              public static void main(String[] args) {
                  Socket echoSocket = null;
                  DataOutputStream os = null;
                  DataInputStream is = null;
                  DataInputStream stdIn = new DataInputStream(System.in);

                  try {
                      echoSocket = new Socket("http://www.yahoo.com", 7);
                      os = new DataOutputStream(echoSocket.getOutputStream());
                      is = new DataInputStream(echoSocket.getInputStream());
                  } catch (UnknownHostException e) {
                      System.err.println("Don't know about host: taranis");
                  } catch (IOException e) {
                      System.err.println("Couldn't get I/O for the connection to: taranis");
                  }

                  if (echoSocket != null && os != null && is != null) {
                      try {
                          String userInput;

                          while ((userInput = stdIn.readLine()) != null) {
                              os.writeBytes(userInput);
                              os.writeByte('\n');
                              System.out.println("echo: " + is.readLine());
                          }
                          os.close();
                          is.close();
                          echoSocket.close();
                      } catch (IOException e) {
                          System.err.println("I/O failed on the connection to: taranis");
                      }
                  }
              }
          }