Page 176 - CTS - CSA TP - Volume 2

COMPUTER SOFTWARE APPLICATION - CITS

EXERCISE 109 : Create and use virtual methods

Objectives

At the end of this exercise you shall be able to
• develop Java programs to Create and use virtual methods.

Requirements

Tools/Materials
• PC / laptop with windows OS
• SDK software
• Test editor (Visual studio/ subline/ notepad)

Procedure

In Java, the term “virtual methods” is often associated with polymorphism, specifically dynamic method dispatch,
which is a key feature of object-oriented programming (OOP). In Java, all non-static methods are inherently virtual.
Let’s create a simple Java program that demonstrates the use of virtual methods and provide an explanation:
// Base class
class Shape {

// Virtual method
public void draw() {
System.out.println(“Drawing a generic shape”);
}
}

// Derived class 1
class Circle extends Shape {
// Overrides the virtual method
@Override

public void draw() {
System.out.println(“Drawing a circle”);
}
}

// Derived class 2
class Square extends Shape {
// Overrides the virtual method
@Override

public void draw() {
System.out.println(“Drawing a square”);
}

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