Question 1: Create a class named ClassA. Define two instance variables along with getter and setter named: att1, att2. Define a private constructor with no arguments. Now try to create instance of the class from a test class. What problem do you face? How can you resolve this issue?
Q: What is the scope of a private instance variable? O All classes in the same package as the class in…
A: The class's instance variables are shared by all of the class's methods and can be marked as public…
Q: What is the difference between a class and an object? Can you explain this using an example from the…
A: the difference between class and object with realtime example is given below
Q: Q2\A\ fill the blanks ( answer three) 1- The private part of Class called -------- and the public…
A: Here, I have to answer the above questions.
Q: 1. Based on the diagram above, which is the correct declaration for the class FederationStarShip? 2.…
A: FederationStarShip is a class which is deriving StarShip class and this this class declaration will…
Q: escribe a scenario, where using anonymous classes might not be helpful is rather proble
A: Given:- Describe a scenario, where using anonymous classes might not be helpful is rather…
Q: For the given parent class, write a child class that satisfies the following requirements: • child…
A: Inheritance: It is OOP concept where one class inherits all the methods and properties of another…
Q: Discuss the pros/cons of using protected access for a class? Does it support or break encapsulation?…
A: Introduction: Here we are required to discuss the pros/cons of using protected access for a class,…
Q: What is a class loader? Class vs. Object? What is a constructor?
A: According to the question we need to give clear explanations and code examples for each…
Q: Class Student needs to create different constructors, but only have the initialization of instances…
A: Here we have given an example to create different constructors
Q: Consider the class Car and the subclass SportsCar. Car has instance data of currentSpeed, type,…
A: A sports car may have a racing stripe that could be stored in a boolean variable and a maxSpeed, and…
Q: Which one is true? A) An inner class can be declared public or private subject to the same…
A: All the statements are true. So option A,B,C,D are correct
Q: If a class C1 has an instance variable whose type is another class, C2. This means C1 has-a C2."…
A: In java aggregation is a phenomenon which is defined as a Has –A relation, where a class possesses…
Q: A class called Customer (as shown in the class diagram above) is designed to model a customer. It…
A: Step 1 : Start Step 2 : Defining the class Customer and inside it declare the Data members. Step 3 :…
Q: What indicates that a class definition is complete? A. The first line of code that is not indented.…
A: A. The first line of code that is not intended: It is correct
Q: Given the following classes, answer the below questions. 1. Person (abstract class) that has the…
A:
Q: e accessibility of a protected attribute that is in a public class? A. Any class has access to…
A: Explanation: All classes in the same package, as well as subclasses from other packages, can access…
Q: Create a class named ClassA. Define two instance variables along with getter and setter named: att1,…
A: Constructor is a special member function of the class. It is a method that has the same name as that…
Q: Suppose you were implementing a Company---Employee relationship. Which of these classes would be…
A: Company comprises (made up of) Employees and hence it is the aggregating class. The existence of the…
Q: Consider the PlayingCard, Rank and Suit classes. a)Which two classes are instance…
A: Given classes: PlayingCard Rank Suit 1. From the given class diagram, we can say that the two…
Q: Suppose that class three is derived from class two and class two is derived from class one and each…
A: Given: There are three classes in the program. Class three is derived from the class two, class two…
Q: Find the attached file.
A: Class defitnion: Class is a user-defined data type that contains the data members and member…
Q: Assignment class The Assignment class should have the following three instance variables: String…
A: public static double average( List<Assignment> assignments) { double…
Q: ) Consider a class Name, which has four instance data (all Strings): first, middle, last and title.…
A: please see the next step for solution
Q: Class Student needs to create different constructors, but only have the initialization of instances…
A: Program Code: class Student{ String name; int age; int classes; Student(String n,int…
Q: For the given parent class, write a child class that satisfies the following requirements: • child…
A: parent class- name Berry import java.io.ObjectStreamClass;import java.sql.Connection;import…
Q: UML diagram analysis: refer to the following UML diagram of the Loan Class. a) How many instance…
A: UNL Diagram consists of three sections: Section 1: Class Name Section 2: Data members. The attribute…
Q: Q3. Why we need multiple constructors and multiple methods of the same name in a class? Provide an…
A: Constructors are the special methods which has same name as class name gets invoked automatically…
Q: Class Student needs to create different constructors, but only have the initialization of instances…
A: initialization - initializes variables and is executed only once.condition - if true , the body of…
Q: Why can't we use an object from the parent class in the child class and yet use all of its features
A: One of the fundamental components of object-oriented programming is inheritance. It enables us to…
Q: Define a Car class that instantiates objects that mimic the behavior of motor cars. The constructor…
A: Note: The second figure has some data missing. So i assumed it accordingly. Please change from your…
Q: d. Is there any way that an object can access private data members of its class? Write a small piece…
A: Answer: Yes, it is possible by using the pointer or by using the friend function.
Q: Q# A program that has no graphical user interface and only takes input through the command line only…
A: Note: Since the Question is multiple one. We are advised to do only first question. Kindly post…
Q: Question 9 Which of the following are not parts of the class in the OOP paradigm? A) Class Name…
A: In this problem, we will discuss about class in OOP paradigm.
Q: Some programmers look at the code and decide to create relationships between classes. Is this…
A: There are three most common relationships among classes in Java that are as follows: Dependence…
Q: Question 1: Create a class named ClassA. Define two instance variables along with getter and setter…
A: Private constructor : access specifier can be provided to the constructor, private constructor…
Q: Question 5 (a) What is the role of the constructor for an object? (b) Give an example of the…
A: Role of the constructor for an object in C++ Example program to implement Default constructor class…
Q: Why we need multiple constructors and multiple methods of the same name in a class? Provide an…
A: The concept of having same name for multiple methods is called as Method Overloading and same name…
Q: Which statement is true? Question 14 options: An abstract method is a method that appears in a…
A: Answer to the above question about true statements of Abstract method is in step 2.
Q: Question.16. What is true about Class.getInstance()? i. Class.getInstance calls the constructor…
A: Question.16. What is true about Class.getInstance()? i. Class.getInstance calls the constructor ii.…
Q: 4.What is true for redeclaration of a class method? A:it is an operator, therefore not possible…
A: Inheritance property is used here. When you will redeclare class methods. Overriding of behavior…
Q: Simple factory is not considered a design pattern because it does not decouple the client from…
A: Simple factory is not considered a design pattern because it does not decouple the client from…
Q: The Customer class In the context of our problem domain, what must the Custoner class know? The…
A: public class Customer{ private String name; private String address; private String telNo;…
Q: When should you use an abstract class? Group of answer choices 1. All options are correct. 2.…
A: Answer: when abstract class use then two or more classes can share identical method so option 2 is…
Q: A constructor that takes an existing user as well as a new userID. * It should create a new user…
A: As, you have not provided the implementation information of the twitteruser class. i just did the…
Q: While we discussed the steps to define an interface for a class, we mentioned that that a class…
A: (1) Explain why this practice causes problems? diamond inheritance" problem, it simply avoids it by…
Note: Question of Java
Step by step
Solved in 5 steps with 2 images
- Question 1: Create a class named ClassA. Define two instance variables along with getter and setter named: att1, att2. Define a private constructor with no arguments. Now try to create instance of the class from a test class. What problem do you face? How can you resolve this issue?B - RobotFriend Create a RobotFriend class. RobotFriend is a new toy just on the market. Copy the starter class and the tester from Codecheck. A RobotFriend has a name and replies to various commands Provide a constructor that takes the name of the RobotFriend as a parameter. Remember that a constructor has the same name as the class. What does the class need to remember? That is the instance variable. Provide the following methods: public String getName () gets the name of this RobotFriend • public void setName (String newName) sets a new name for this RobotFriend • public String whatDoYouNeed () returns a string consisting of name + needs a battery charge" where name is the name of this RobotFriend (which was supplied in the constructor) public String doCommand (String whatToDo) returns a string consisting of "Your friend " + name + does not + whatToDo where name is the name of this RobotFriend and whatToDo is the parameterGiven this class, please add the requested methods in the designated spaces provided. Instance methods: a) Write two constructors that will initialize the instance variables for a Student instance as follows: 1) Write a constructor that takes in three parameters – an int, a String, and a double. The constructor will assign them to the ID, name, and GPA instance variables respectively. 2) Write a no-argument (zero-parameter) constructor that will set the ID to - 1, the name to “No name assigned”, and the GPA to –1.0. b) Write an accessor method for the name variable. c) Write a mutator method for the GPA variable. d) Write a toString() method that will display all three instance variables on a single line, with a | (vertical bar) character between each one. e) Write an equals() method that returns true only if all three instance variables are equal. public class Student { // declare instance variables here private int ID; private String name; private double GPA;
- Question 1 Create a base class Student. The class has the following private instance variables, constructor, and methods. * A String instance variable m id. *A String instance variable m name. • An int instance variable m creditHours. • A constructor that takes three parameters and sets the values of the instance variables accordingly. • Getters for the above three instance variables. • A boolean equals (Student s) method that compares the current student object and the object passed into the method. It returns true if the two objects have the same content, i.e., id, name, and hours. Otherwise, it returns false. • Override the toString () method so it prints the info of the current student object in the following format: Student ID: 123456 Name: Kungfu Panda Credit Hours Earned: 95 • Build a test driver by creating a class TestStudent to test the functionality of the class Student: 1. Remember to print the object by SOPL (object name), rather than explicitly calling the toString ()…Design and implement a Restaurant class with at least three meaningful attributes and two methods. Implement a test program which creates at least two instances of the restaurant class and calls all the methods. Some possible attributes are name, numberOfTables, cuisine, numberOfReservations, capacity, etc. Some possible methods are make Reservation, checkAvailability, etc. Note the following: -All properties must be declared as private and you need accessor and mutator methods for each property. - You need to define at least one constructor. Documentation o Include header comments that include description of the program. o Include body comments o Consistent indentations o Consistent white line spaces Properties are declared as private o Accessor and mutator methods are created o At least one default constructor o At least two instances are created1.How do we gain access to private attributes outside of the class they are defined? Through public methods Through static methods Through private methods Through the class identifier 2. If you were designing a class called Point and the class had a static variable or function, which of the following would either define or use it correctly? self.x = x self.increaseNumPoints() def mystery(self, x, y): Point.numPoints += 1 3.To promote security and object ecapsulations, object attributes should be declared as: static protected private public 4. Two underscores ( __ ) will precede: public attributes private attributes public methods private methods Both public attributes and methods both private attributes and methods 5. Which of the following is required in a class to create unique…
- Is there a different way of doing this problem? Question: Create a class AccessPoint with the following attributes: x - a double representing the x coordinate y - a double representing the y coordinate range - an integer representing the coverage radius status - On or Off Add constructors. The default constructor should create an access point object at position (0.0, 0.0), coverage radius 0, and Off. Add accessor and mutator functions: getX, getY, getRange, getStatus, setX, setY, setRange and setStatus. Also, add a set function that sets the location coordinates and the range. Add the following member functions: move and coverageArea. Add a function overlap that checks if two access points overlap their coverage and returns true if they overlap. Add a function signalStrength that returns the wireless signal strength as a percentage. The signal strength decreases as one moves away from the access point location. Test your class by writing a main function that creates five access…Write a tester program to test the mobile class defined below. Create the class named with your id (use : Id 190099306) with the main method. Create two mobiles M1 and M2 using the first constructor. Print the characteristics of M1 and M2. Create one mobile M3 using the second constructor. Change the id and brand of the mobile M3. Print the id of M3. Your answer should include a screenshot of the output. public class Mobile { private int id; private String brand; public Mobile() { id = 0; brand = ""; } public Mobile(int n, String name) { id = n; brand = name; } public void setBrand(String w) { brand = w; } public void setId(int w) { id = w; } Public int getId() { return id; } public String getBrand() { return brand; } } please provide me how to do the steps and i will try to work it alone. we didn't study this excersie in the labQ# A program that has no graphical user interface and only takes input through the command line only has a model and a controller. It does not have a view. The answer: is FALSE. Please explain with example. Q# What is NOT an effect of the SOLID principles? The answer: A high-level class depends on specific low-level classes and not interfaces. Please explain why. Q# Assume you are considering writing a method and are deciding what should happen when given input that is outside of perfect input. Which of the following is not a way to handle this? Answer: Use better JUnit testing. Subject: Java Programming
- Note: Write a Java Program Given below Q NeuronTech is a leading service provider in Pakistan. Assuming you have been hired as an architect for NeuronTech solutions. You have been tasked with the development of an airline reservation system. Identify all the classes (at least four) with behaviors, attributes, constructor, getter/ setter. Draw class diagram. Create a Test class. Instantiate objects, use getter / setter to manipulate instance variables and call the behaviors.Write the Movie class. The UML diagram of the class is represented below: 1. Implement the class strictly according to its UML one-to-one (do not include anythingextra, and do not miss any data fields or methods). 2. Implement a MovieTest class to test the class Movie you just created.• Create two Movie objects: one using the no-args constructor and one from theconstructor with all fields.• Print the contents of both objects. Please submit a screenshot. Hint: toString()method.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…