Socket 问题！

哥们儿们帮个忙看这个代码怎么运行不了。谢谢
import java.io.*;
import java.net.*;public class EchoClient {
    public static void main(String[] args) throws IOException {        Socket echoSocket = null;
        PrintWriter out = null;
        BufferedReader in = null;        try {
           
            echoSocket = new Socket("127.0.0.1", 8080);
            out = new PrintWriter(echoSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(
                                       echoSocket.getInputStream()));
        } catch (UnknownHostException e) {
            System.err.println("Don't know about host: taranis.");
            System.exit(1);
        } catch (IOException e) {
         System.out.println(e.getMessage());
            System.err.println("Couldn't get I/O for "
                               + "the connection to: taranis.");
            System.exit(1);
        } BufferedReader stdIn = new BufferedReader(
                                   new InputStreamReader(System.in));
String userInput; while ((userInput = stdIn.readLine()) != null) {
    out.println(userInput);
    System.out.println("echo: " + in.readLine());
} out.close();
in.close();
stdIn.close();
echoSocket.close();
    }
}