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;
    //InetAddress address ="192.168.1.2";

    try 
    {
        echoSocket = new Socket("sunil-PC", 7);
        out = new PrintWriter(echoSocket.getOutputStream(),true);
        in = new BufferedReader(new InputStreamReader(echoSocket.getInputStream()));
    }
    catch (UnknownHostException e) 
    {
        System.err.println("Don't know about host: sunil-PC.");
        System.exit(1);
    } 
    catch (IOException e) 
    {
        System.err.println("Couldn't get I/O for " + "the connection to: sunil-PC."+ e);
        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();
}

}

this is my code, compiled with no errors, but when running giving "java.net.connectexception connection refused: connect"