Cast int as byte array in Java directly / What type of bytes(?) do I want

Question

I want to cast an int to a byte[] in Java. Can this be done directly? I noticed I can do this by converting it to a string like so:

            int num = 5;
            String dataString = Integer.toString(num);
            byte[] data = dataString.getBytes();

I was just curious if there was a direct method such as num.getBytes().

I'm doing this in the frame of reference of using the Java Xbee library. In the example they do the following:

private static final String DATA_TO_SEND = "Hello XBee World!";

public static void main(String[] args) {
    XBeeDevice myDevice = new XBeeDevice(PORT, BAUD_RATE);
    byte[] dataToSend = DATA_TO_SEND.getBytes();

    try {
        myDevice.open();

        System.out.format("Sending broadcast data: '%s'", new String(dataToSend));

        myDevice.sendBroadcastData(dataToSend);

        System.out.println(" >> Success");

    } catch (XBeeException e) {
        System.out.println(" >> Error");
        e.printStackTrace();
        System.exit(1);
    } finally {
        myDevice.close();
    }
}

If I had an int how should I send that data? The sendBroadcastData() function takes byte[] as an argument. The example I'm referring to above can be found here