Параллельное выполнение на нескольких устройствах с использованием концепции потоков Java

public void startAppium() {
    //start appium instance
    try {
        Thread.sleep((long)(Math.random() * 10000)); //wait from 0 to 10 sec for parallel process run
        ProcessBuilder builder = new ProcessBuilder(getCmd());
        builder.redirectOutput("path to log file"); //here you can find logs of appium
        builder.redirectErrorStream(true);
        appium = builder.start();
        Thread.sleep(3000); //wait 3 sec until server started
    } catch (Exception e) {
        e.printStackTrace();
    }
}