class myClass {
    public static void main(String[] args) {
      // create an object of the Student class (which inherits attributes and methods from Person)
      Student myObj = new Student();

      System.out.println("Name: " + myObj.fname + " " + myObj.lname);
      System.out.println("Email: " + myObj.email);
      System.out.println("Age: " + myObj.age);
      System.out.println("Graduation Year: " + myObj.graduationYear);
      myObj.study(); // call abstract method
    }
  }

 // abstract class
abstract class Person {
    public String fname = "John";
    public String lname = "Doe";
    public String email = "john@doe.com";
    public int age = 24;
    public abstract void study(); // abstract method
  }

  // Subclass (inherit from Person)
  class Student extends Person {
    public int graduationYear = 2018;
    public void study() {
      System.out.println("Studying all day long");
    }
  }