//Subscribed by Mritunjay Kumar //https://www.facebook.com/Mritunjay70/posts/1445812775628125 abstract class Person { String name; int age; Person() { } Person(String n, int r) { name = n; age = r; } void setData(String name1, int age1) { name = name1; age = age1; } void printDetails() { System.out.print("Name: "+name+" Age: "+age); } abstract void exceptional(); final void isAdult() { if (age > 18) System.out.println("\t Yes"); } } // class Person ends class Student extends Person { double cpi; Student() { } Student(String n, int r, double c) { super(n, r); cpi = c; } void setData(String name1, int age1, double cpi1) { super.setData(name1, age1); cpi = cpi1; } void printDetails() { System.out.println(); super.printDetails(); System.out.print(" CPI: "+cpi); } void f() { } void exceptional() { if (cpi > 9.5) System.out.print(" Exceptional "); } void isAdult(Person p) { } } // class Student ends here abstract class test extends Student { abstract void f(); void f2(){ } } class Faculty extends Person { float noOfPub; Faculty() { } Faculty(String n, int r, float nop) { super(n, r); noOfPub = nop; } void setData(String name1, int age1, int nop) { super.setData(name1, age1); noOfPub = nop; } void printDetails() { System.out.println(); super.printDetails(); System.out.print(" No of Pub: "+noOfPub); } void exceptional() { if (noOfPub > 100) System.out.print(" Exceptional "); } } public class AbstractDemo { public static void main(String[] args) { Student s1 = new Student(), s2 = new Student(); Faculty f1 = new Faculty(), f2 = new Faculty(); s1.setData("A", 10, 9.7); s2.setData("B", 10, 7.0); f1.setData("C", 70, 300); f2.setData("D", 75, 50); Person [] p= new Person[4]; p[0] = s1; p[1] = s2; p[2] = f1; p[3] = f2; for (int index=0; index