[JAVA] Design an inheritance in JAVA.
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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:
[JAVA] Design an inheritance in JAVA.
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- Draw an inheritance hierarchy for students at a university. Use Student as the superclass of the hierarchy, then, extend Student with classes Undergraduate Student and Graduate Student. Continue to extend the hierarchy as deep (i.e., as many levels as possible). For example, Freshmen, Sophomore, Junior, and the Senior might extend Undergraduate Student and Doctoral Student and Masters Student might be subclasses of Graduate Students. After drawing the hierarchy, discuss the relationships that exist between the classes. [Note: You do not need to write any code for this exercise].Q3 Use the concept of polymorphism and classes to represent the following analog A Transportation class has the fields (model, year) with all the setters and getters. An Airplane class inherits Transportation, and it has a field number of wings (no wings) with a setter and a getter. A Car class inherits Transportation, and it has a field number of wheels (no wheels) with a setter and a getter. Al the parent and child classes have toString( ) method that prints everything. In the main program, create an array of transportations of size 6 (3 of them are airplanes and 3 are cars), and put any values you choose in the constructors. Finally run a loop through the array and print all the information, and by using the tool “instance of” if the element is an airplane, print “BINGO..AIRPLANE”, if the element is a car, print “BINGO..CAR”(a) Create an inheritance hierarchy of Rodent: Mouse, Gerbil, Hamster, etc. In the base class, providemethods that are common to all Rodents, and override these in the derived classes to perform differentbehaviors depending on the specific type of Rodent. Create an array of Rodent, fill it with different specific types of Rodents, and call your base-class methods to see what happens. (b) Create a Cycle class, with subclasses Unicycle, Bicycle and Tricycle. Demonstrate that an instance of eachtype can be upcast to Cycle via a ride( ) method. Using the above Cycle hierarchy, add a balance( ) methodto Unicycle and Bicycle, but not to Tricycle. Create instances of all three types and upcast them to an arrayof Cycle. Try to call balance( ) on each element of the array and observe the results. Downcast and callbalance( ) and observe what happens.
- Write a generic class of Shape with the attribute of center and operation to calculate area. Inherit the classes of Circle, Triangle, and Square such that the operation to calculate area has dynamic late binding. Write these classes such that Shape is an abstract class whereas all others are concrete classesAnswer the given question with a proper explanation and step-by-step solution. The base class Pet has protected fields petName, and petAge. The derived class Cat extends the Pet class and includes a private field for catBreed. Complete main() to: create a generic pet and print information using printInfo(). create a Cat pet, use printInfo() to print information, and add a statement to print the cat's breed using the getBreed() method.solve this by arraylist in the last of the question it has been told Create abstract class Pet , which is the abstract superclass of all animals. Declare a integer attribute called legs, which records the number of legs for this animal. Define a constructor that initializes the legs attribute. Declare an abstract method eat. Declare a concrete method walk that prints out something about how the animals walks (include the number of legs). Create the Dog class. The Dog class extends the Pet class. This class must include a String attribute to store the name and food of the pet Define a default constructor that calls the superclass constructor to specify that all dogs have 4 legs and name. override the eat and walk method. Create the Cat class that extends Pet. This class must include a String attribute to store the name of the pet, and a string to save food . Define a constructor that takes one String parameter that specifies the cat's name and food. This constructor must also…
- What does the super keyword represents and where can it be used? Give an example of a superclass and subclass. Be sure to make all the instances variables of the super class private. Include at least one constructor in each class and ensure that the constructor of the subclass calls the constructor of the superclass. Also include a toString method in both classes that returns the values of the instance variables with appropriate labels. Ensure that the toString method of subclass calls the toString method of the superclass so that the string returned contains the values of all the inherited instance variables.When would you be most likely to use an abstract class? when you need to derive a class from Object when every method in the class is concrete when you need a super class that should not be instantiated when you need a super class that can be instantiated alongside the derived classes =========== Which UML symbol represents aggregation? a filled triangle an unfilled diamond an unfilled triangle a filled diamondWrite an java inheritance hierarchy for classes Quadrilateral, Trapezoid, Parallelogram, Rectangle and Square. Use Quadrilateral as the superclass of the hierarchy. Make the hierarchy as deep (i.e., as many levels) as possible. Specify the instance variables and methods for each class. The private instance variables of Quadrilateral should be the x-y coordinate pairs for the four end- points of the Quadrilateral. Write a program that instantiates objects of your classes and outputs each object’s area (except Quadrilateral).
- create a uml class diagram on this code: from abc import ABC, abstractmethod class GreyAnatomy(ABC):@abstractmethoddef Tvshow(self):pass class Grey(GreyAnatomy):def Tvshow(self):print("I am Derek") class Rank(Grey):def Tvshow(self):print("I am an attending") class Specialty(Rank):def Tvshow(self):print("I am an neurosurgeon doctor") G = Grey()G.Tvshow() R = Rank()R.Tvshow() S = Specialty()S.Tvshow()Write the abstract super class Transaction, and two of its subclasses, Payment and Sale (you do not need to supply any comments other than your name). I. Write an abstract superclass encapsulating a Transaction: The Transaction super class has an instance variable representing the customers name, and 3 methods: an overloaded constructor, a toString() method that returns a message including the name of the customer, and an abstract method called calculateAmount()which will be implemented in your subclasses. II. Write a non-abstract subclass that inherits from the Transaction class encapsulating a Payment: The Payment class has instance variable representing the payment amount received and 3 methods. It has an overloaded constructor, a toString() method that returns a message including customers name, the name of the class Payment, and the payment amount, an non-abstract class called calculateAmount() which returns the payment amount. III. Write a second…Use the parent classes to the left to help you solve this problem. The first parent is the Person class with some very generic information. The second class, CardHolder, is the class for a credit card holder. Create the child class PlantinumClient. This class inherits all of the attributes of both parent classes. In addition, the child class has the attributes cash_back and rewards. cash_back should be set to 0.02 and rewards should be set to 0. Override the process_sale method so that 2% of each sale is added to rewards. Expected Output Declare an instance of the PlatinumClient class as shown below. platinum = PlatinumClient("Sarah", "101 Main Street", 123364) Your class should be able to execute the code below in the stated order and produce the given return values. Order Code Return Value 1 platinum.process_sale(100) N/A 2 print(platinum.rewards) 2 3 print(platinum.balance) 100 4 platinum.make_payment(50) N/A 5 print(platinum.balance)…