Mine

    private static boolean connect(String proxy, int port) throws IOException {
    	Socket proxySocket = new Socket(proxy, port);
        PrintWriter out = new PrintWriter(proxySocket.getOutputStream(), true);
        BufferedReader in = new BufferedReader(new InputStreamReader(
                                    proxySocket.getInputStream()));
        
        out.println("GET http://u1.swirve.com/ HTTP/1.1 \n");
        
        String currentLine = in.readLine();
        boolean result = (currentLine != null) &&
                (currentLine.equals("HTTP/1.1 OK") || currentLine.equals("HTTP/1.0 OK"));

        out.close();
        in.close();
        proxySocket.close();
    	
        return result;        
    }