a) write the definition of the 4 methods as described in the definition of the clas TestClass.b) write a complete demo test program with the main() to test All of the operations of the TestDemoClass class. Sure! Here's the transcription as if it will appear on an educational website:---**Understanding Class Definitions in Java**In this example, we are given the definition of a simple Java class named `TestClass`. This class demonstrates basic class structure in Java, including private variables, constructors, and methods.```javapublic class TestClass{ private int x; private int y; // Default constructor to initialize the instance variables to 0 public TestClass() { // Implementation details } // Constructor with parameters to initialize the instance variables // to the values specified by the parameters public TestClass(int a, int b) { // Implementation details } // Return the sum of the instance variables public int sum() { // Implementation details } // Print the values of the instance variables public void print() { // Implementation details }}```**Key Components:**- **Instance Variables:** The class has two private instance variables, `x` and `y`, of type `int`.- **Constructors:** - The default constructor initializes the instance variables `x` and `y` to zero. - An overloaded constructor accepts two parameters, `a` and `b`, to initialize the instance variables.- **Methods:** - `sum()`: This method returns the sum of the instance variables `x` and `y`. - `print()`: This method outputs the values of `x` and `y`.This example provides a foundational understanding of how to structure a class in Java, manage instance variables, and implement basic functionality through methods.

public class TestDemoClass{ public static void main(String[] args) { TestClass t1=new…

a) write the definition of the 4 methods as described in the definition of the clas TestClass. b) write a complete demo test program with the main() to test All of the operations of the TestDemoClass class.

a) write the definition of the 4 methods as described in the definition of the clas TestClass. b) write a complete demo test program with the main() to test All of the operations of the TestDemoClass class.

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 Course class by implementing the courseSize() method, which returns the total number of students in the course. Given classes: Class LabProgram contains the main method for testing the program. Class Course represents a course, which contains an ArrayList of Student objects as a course roster. (Type your code in here.) Class Student represents a classroom student, which has three fields: first name, last name, and GPA. Ex. For the following students: Henry Bendel 3.6 Johnny Min 2.9 the output is: Course size: 2 public class LabProgram { public static void main (String [] args) { Course course = new Course(); // Example students for testing course.addStudent(new Student("Henry", "Bendel", 3.6)); course.addStudent(new Student("Johnny", "Min", 2.9)); System.out.println("Course size: " + course.courseSize()); } } public class Student { private String first; // first name private String last; // last name private…
Write a method for the farmer class that allows a farmer object to pet all cows on the farm. Do not use arrays.
B elow for each class you find a UML and description of the public interface. Implementing the public interface as described is madatory. There's freedom on how to implement these classes.The private properties and private methods are under your control.. There are multiple ways of implementing all these classes. Feel free to add private properties and methods. For each object, it's mandatory to create a header file (.h), implementation file (.cpp) and a driver. Blank files are included. The header should have the class definition in it. The implementation file should contain the implementations of the methods laid out in the header fine. And finally the Driver should test/demonstrate all the features of the class. It's best to develop the driver as the class is being written. Check each section to see if there are added additional requirements for the driver. Two test suites are included so that work can be checked. It's important to implement the drivers to test and demonstrate…
I've gotten stuck on this practice problem. I need help figuring this out. You need to make a Pet class that holds the following information as private data members: the name of the pet (e.g. "Spot", "Fluffy", or any word a user enters) the type of pet (e.g. dog, cat, snake, hamster, or any word a user enters) level of hungriness of the pet (2 means hungry, 1 means content, 0 means full) Your class also needs to have the following functions: a default constructor that sets the pet to be a dog named Buddy, with level of hungriness being “content” a parameterized constructor to allow having any type of pet the order of the parameters is: name of the pet, type of pet, hungriness level a PrintInfo function that prints the info for the pet according to the sample output below a TimePasses function that increases the hungry level of the pet by one (unless its hungry level is already 2, meaning hungry). a FeedPet function that changes the hungry level of the pet to 0 (Full) You must…
7. Write a program in java to declare and define a class using the below mentioned details. a. Write a class Question that define the following information: • (Fields): Qnumber, Qtitle, Qanswer. b. Write two constructors: • empty constructor. two parameters constructor C. Write a mutators and accessors methods for each attributes (fields).
Write a driver program to test the class. Provide a constructor thatenables an object of this class to be initialized when it isinstantiated.
Part 1: Abstract Classes 1. Copy the source files of Circle, Rectangle and GeometricObject classes (located in LabFiles folder) and paste them in the default package (You may need to fix any problems related to package declaration). 2. Open Circle, Rectangle and GeometricObject classes using NetBeans editor and go through the classes’ implementation. 3. In the GeometricObject class add two methods called respectively getArea() and getPerimeter(). Discuss: 1. Is the area formula of a circle similar to area formula of a rectangle? Since: GeometricObject is the superclass of Circle and Rectangle, and getArea() method is a common method in both Circle and Rectangle classes. Then: 2. Should you define the getArea() method in the superclass GeometricObject? Or in the subclasses Circle and Rectangle? 3. If yes, Should the getArea() method be declared as abstract method in the superclass GeometricObject? Or as instant method? 4. Is declaring getArea() as abstract, would solve…
is this just for the candidate class or is the election class included?
82. Write a class definition for a class named Fraction that contains two integer fields named numerator and denominator. Include in the class a prototype for a method (function) named add that takes two Fraction objects as input arguments and returns a Fraction object as output. You do not need to provide an implementation of the add method.
Written in Python with docstring please if applicable Thank you