Page 280 - PowerPoint Presentation

CAVITE STATE UNIVERSITY
TRECE MARTIRES CITY CAMPUS
Department of Information Technology DCIT 111 - Advanced Programming

public class TestPolymorphism3 {
public static void main(String[]args){

Animal animal; // creation of an object Animal
animal = new Dog();
animal.eat();
animal = new Cat();
animal.eat();
animal = new Lion();
animal.eat();
} }

// Java Runtime Polymorphism with Multilevel Inheritance
class Animal {
void eat() {
System.out.println(“Animal is eating…”);
}
}
class Dog extends Animal {

void eat() {
System.out.println(“Dog is eating fruits…”);
}
}
class BabyDog extends Dog {
void eat() {
System.out.println(“Baby Dog is drinking milk…”);
}
}
public class TestPolymorphism4 {
public static void main(String[]args) {

Animal a1, a2, a3;

a1 = new Animal();
a2 = new Dog();

a3 = new BabyDog();
a1.eat();
a2.eat();
a3.eat();
}
}

QUIZ NO 6. Hardcoding: Write a program on a piece of paper that applies ‘Multi-level
Inheritance’.
Intructions:
1. Write a program that has 3 classes besides the main class namely Student, Marks and
Results.
2. On Student class, add a method that allows the user to ENTER a Student ID and
Student Name. use method name insertStudentInfo()
3. On Student class also, add another method that displays the Information entered by
the user on method insertStudentInfo(). Use method name displayInfo()
4. On Marks Class, add a method that allows the user to enter a grade for Math, English
and Filipino subject. use method name insertMarks()

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