public void showURLInBrowser(String url) {
        String operatingsystem = System.getProperty("os.name").toLowerCase();
        Runtime rt = Runtime.getRuntime();
        try {
            if (operatingsystem.indexOf("win") >= 0) {
                String[] cmd = new String[4];
                cmd[0] = "cmd.exe";
                cmd[1] = "/C";
                cmd[2] = "start";
                // cmd[3] = url; így kezeli 1 form változónál többet is!
                cmd[3] = url.replace("&", "\"&\"");
                rt.exec(cmd);
            } else if (operatingsystem.indexOf("mac") >= 0) {
                rt.exec("open " + url);
            } else {
                //prioritized 'guess' of users' preference
                String[] browsers = {"epiphany", "firefox", "mozilla", "konqueror", "netscape", "opera", "links", "lynx"};
                StringBuffer cmd = new StringBuffer();
                for (int i = 0; i < browsers.length; i++) {
                    cmd.append((i == 0 ? "" : " || ") + browsers[i] + " \"" + url + "\" ");
                }

                rt.exec(new String[]{"sh", "-c", cmd.toString()});
            }
        } catch (Exception e) {
            printFramework("The system failed to invoke your default web browser while attempting to access: " + url);
        }
    }