class Alpha {  String getType() {   return "alpha";  } } class Beta extends Alpha {  String getType() {   return "beta";  } } public class Gamma extends Beta {   String getType() {   return "gamma";  } public static void main(String[] args) {  Gamma g1 = new Alpha();  Gamma g2 = new Beta();  System.out.println(g1.getType() + " "     + g2.getType());  } }