package examples;
class Mammal {
private boolean hasHair = true;
}
class Human extends Mammal2 {
public static void main(String args[]) {
System.out.println("Hello World!");
}
}
class Doggy extends Mammal2 {
public static void main(String args[]) {
System.out.println("Hello World!");
}
}
class Student extends Human {
public static void main(String args[]) {
System.out.println("Hello World!");
}
}
class Professor extends Human {
public static void main(String args[]) {
System.out.println("Hello World!");
}
}