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If this code was written in C++, what keyword would need to precede the declaration of the draw() method in the Shape class in order to allow polymorphism?

If this code was written in C++, what keyword would need to precede the declaration of the draw() method in the Shape class in order to allow polymorphism?

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Complete the code to create a polymorphism situation.

If this code was written in C++, what keyword would need to precede the declaration of the draw() method in the Shape class in order to allow polymorphism?
Transcribed Image Text:If this code was written in C++, what keyword would need to precede the declaration of the draw() method in the Shape class in order to allow polymorphism?
Shape is a superclass with subclasses Circle, Rect, etc. Assume that Shape has a draw() method that does nothing, and that Circle and Rect each have a draw() method that draws a circle and rectangle, respectively. Consider the following code: Circle cl = new Circle (Color.BLUE, 100,100, 50); (Color.GREEN, 200,100, 50,50); Rect rl = new Rect cl.draw () ; rl.draw () ; Shape s1 s1.draw () ; s2.draw () ; cl, s2 rl, s3;
Transcribed Image Text:Shape is a superclass with subclasses Circle, Rect, etc. Assume that Shape has a draw() method that does nothing, and that Circle and Rect each have a draw() method that draws a circle and rectangle, respectively. Consider the following code: Circle cl = new Circle (Color.BLUE, 100,100, 50); (Color.GREEN, 200,100, 50,50); Rect rl = new Rect cl.draw () ; rl.draw () ; Shape s1 s1.draw () ; s2.draw () ; cl, s2 rl, s3;
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