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
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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");
}
}
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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