Duvida override do JavaCertificate

1.  class Phone {
2.     static String device = "Phone.device";
3.     void showDevice() {
4.        System.out.print("Phone.showDevice," + device + " ");
5.     }
6.     Phone() {
7.        showDevice();
8.     }
9.  }

1.  class Mobile extends Phone {
2.     String device = "Mobile.device";
3.     void showDevice() {
4.        System.out.print("Mobile.showDevice," + device + " ");
5.     }
6.     Mobile() {
7.        showDevice();
8.     }
9.     public static void main(String[] args) {
10.      Mobile n = new Mobile();
11.      n.showDevice();
12.   }
13. }