ProcessBuilder processBuilder = new ProcessBuilder();
        processBuilder.command("cmd", "/c","длинная кмд");         Process process = processBuilder.start();

        printResults(process); public static void printResults(Process process) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        String line = "";
        while ((line = reader.readLine()) != null) {
            System.out.println(line);
        }
    }