What is the output of the following code that uses these classes?
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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OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
Question
Transcribed Image Text:Consider the three classes Alpha, Beta, and Gamma.
What is the output of the following code that uses these classes?
ArrayList<Gamma> greek = new ArrayList<Gamma>();
greek.add(new Alpha());
greek.add(new Beta());
greek.add(new Alpha());
greek.add(new Beta());
for (Gamma g: greek) {
System.out.print(g.getFour());
}
4four4four
public class Alpha extends Gamma {
public String getTwo() {
return("2");
}
public String getTwo(int i) {
return("two");
}
}
public class Beta extends Gamma{
public String getThree() {
return ("3");
}
public String getFour() {
return ("four");
}
}
public abstract class Gamma {
public String getOne() {
return ("1");
}
public String getFour() {
return("4");
}
}
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