can you give me a background explanation i can use to approach this problem? **Title: Understanding Class Inheritance in Java: Alpha, Beta, and Gamma**Consider the three classes `Alpha`, `Beta`, and `Gamma`. What is the output of the following code that uses these classes?### Code Explanation```javaArrayList greek = new ArrayList();greek.add(new Alpha());greek.add(new Beta());greek.add(new Alpha());greek.add(new Beta());System.out.print(greek.get(2).getOne());```### Class Definitions1. **Class `Alpha`**```javapublic class Alpha extends Gamma { public String getTwo() { return "2"; } public String getTwo(int i) { return "two"; }}```2. **Class `Beta`**```javapublic class Beta extends Gamma { public String getThree() { return "3"; } public String getFour() { return "four"; }}```3. **Abstract Class `Gamma`**```javapublic abstract class Gamma { public String getOne() { return "1"; } public String getFour() { return "4"; }}```### Explanation of Code Execution- An `ArrayList` named `greek` is created to hold objects of type `Gamma`.- Four objects are added to the `greek` list in the following order: two `Alpha` objects and two `Beta` objects.- The `System.out.print` statement retrieves the third object (`index 2`) from the list, which is an `Alpha` object, and calls the `getOne()` method.### Output- Since `Alpha` extends `Gamma`, it inherits the method `getOne()` from `Gamma`.- Therefore, the `getOne()` method is executed, and the output is:```1```This simple example demonstrates how inheritance allows objects to use superclass methods, while subclass methods can extend or override functionality when needed.

Java is an object oriented programming language.

Consider the three classes Alpha, Beta, and Gamma. What is the output of the following code that uses these classes? ArrayList greek = new ArrayList(); greek.add(new Alpha()); greek.add(new Beta()); greek.add(new Alpha()); greek.add(new Beta()); System.out.print(greek.get(2).getOne());

Consider the three classes Alpha, Beta, and Gamma. What is the output of the following code that uses these classes? ArrayList greek = new ArrayList(); greek.add(new Alpha()); greek.add(new Beta()); greek.add(new Alpha()); greek.add(new Beta()); System.out.print(greek.get(2).getOne());

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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