a) You have a class named “Addition" with 2 variables. There is a constructor to initialize the variables. There is a method named add() to add those number. There is another class "AdvancedAddition" which inherits the functionalities of previous Addition class. This new class includes one more variable and a method add() which can add three numbers. Now send three variables from main method to the object of “AdvancedAddition" class and add all numbers. Initialize the values using constructors. Use super keyword to initialize the first two values within addition class. Write a Java program for the above scenario.
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- Java Question - Using the bottom code, create another class named "DigitalBook" as a subclass of the given "Book" class. Then, Make sure that the "DigitalBook" class contains two constructors: (1) one is the default constructor that takes no parameter, and (2) the other is a parameterized constructor that take 6 parameters. Be sure to use the “super” keyword in the constructors of the "DigitalBook" class. In the “main()” method of the “EX12_1” class, create four instances: “b1”, “b2”, d1”, and “d2”. Let “b1” and “b2” be the instances of the “Book” class, and let the “d1” and “d2” be the instance of the “DigitalBook” class. Be sure to use the specified constructor (as shown in attached picture) to initialize these instances. The Final Output is shown in the attached pictures. Please make sure that no errors show up in the Java Compiler when testing the code. Thank you. Add the following code to the "class Book" code (Below the ___ line). public class EX12_1{public static void…Java Question - Using the bottom code, create another class named "DigitalBook" as a subclass of the given "Book" class. Then, Make sure that the "DigitalBook" class contains two constructors: (1) one is the default constructor that takes no parameter, and (2) the other is a parameterized constructor that take 6 parameters. Be sure to use the “super” keyword in the constructors of the "DigitalBook" class. In the “main()” method of the “EX12_1” class, create four instances: “b1”, “b2”, d1”, and “d2”. Let “b1” and “b2” be the instances of the “Book” class, and let the “d1” and “d2” be the instance of the “DigitalBook” class. Be sure to use the specified constructor (as shown in attached picture) to initialize these instances. The Final Output is shown in the attached pictures. Add the following code to the "class Book" code (Below the ___ line). public class EX12_1{public static void main(String[] args){/////add your code here}}…Task 3 question: Write code in Java with all these classes implementation and a program called Polymorphism_works with member method specific_Item which takes one instance of Item_in_Stock class as a parameter. Perform functionality of adding items, selling items and changing item price and displaying items details against specific item instance. There should be a main () method which declares an array of objects containing instance of sub classes of Item_in_Stock class and then calls methods of each of the implemented classes. More info: In this last and final part of the course work you are required to change the definition of the Item_in_Stock class to make it an abstract class and change the getItemCat(), getItemName() and getItemDescription() definitions to make them abstract methods. You are then required to design and implement three classes which are derived from Item_in_Stock class to fully demonstrate the concept of inheritance and polymorphism. Implementation of HP_Laptop…
- Examine the following code and select the correct statements (choose all possibleoptions): class Bottle {Bottle() {}Bottle(WaterBottle w) {}}class WaterBottle extends Bottle {WaterBottle() { }WaterBottle(Bottle w) { } } a) The class Bottle defines two overloaded constructors.b) The class WaterBottle defines two overloaded constructors.c) The class compiles successfully—a base class can use reference variables of its derived class as method parameters.d) Bottle and WaterBottle cause syntax errors.e) The class compiles successfully - A derived class can use reference variables of its base class as method parameters.f) A base class can’t pass reference variables of its defined class, as method parameters in constructors.same function which prints "Rectangle is a polygon" and "Triangle is a polygon" respectively. Again, make another class named Square having the same function which prints "Square is a rectangle". Now, try calling the function by the object of each of these classes.Make a class with name(TerminalExam). Declare two variables i and j of type int in it. In constructor, initialize these variable with values specified in parameters. Make a method named calculate in this class of double return type. In this method, perform the addition of i and j and display the result. Make a second class(SubC2) which inherits from first class (TerminalExam). In this class’s constructor, pass two values as parameters but initialize the fields using superclass’s constructor. Override the method calculate() defined in superclass. In overridden method, calculate the difference of i and j and print the result. Then create a class in the same way for multiplication and division and override the method for multiplication and division respectively. Make another class(Add3V) which extends TerminalExam. In this class, declare a variable c of int type. In constructor of Add3V, call superclass constructor and then set value of c also. In calculate method, first call calculate…
- Define a class called Country. A Country has population S ize, area, capital, currency, and abbreviation ( (2-3 letters taken from the country name). Define at least two constructors, at least two getter methods, at least two setter methods, and Override the toString() method and the equals() method. The equals() method must return true if the two countries have the same name and same area and false otherwise The abbreviation is the first letter and the letter before the last of the country name and must be generated automatically eg if the country name is Palestine the abbreviation is PN, if the country name is Jordan the abbreviation is JA) Write a main method, define an array of country objects, read countries data from the user, if two countries have the same abbreviation add the last letter from the country name to the abbreviation o one million. f the country inserted last Display countries whose populationSize is greater than1- Create a class SchoolKid that is the base class for children ar aschool . It should have attributes of the child’s name and age ,the name of the child’s teacher ,and the greeting. It should haveappropriate accessor and mutator methods for each of the attributes. Derive a class ExaggeratingKid from schoolkid , as described above . The new class should override the accessor method for the age , reporting the actual plus 2. It also should override the accessor for the greeting ,returning the child’s greeting concatenated with the words “I am the best”.Given the following Imagine that is attached, select that all apply A. If the Other class extends the Base class then the method guessNumber() in Other overloads the method guessNumber in Base B. If the Other class extends the Base class then the method guessNumber() in Other overrides the method guessNumber in Base C. If the Base class implements MyInterface then it must implement the guessName method or declare it abstract. D. If the Base class implements MyInterface, then every class that extends the Base class also implements MyInterface. E. If the Other class extends the Base class, and implements MyInterface then the Base class also implements MyInterface F. MyInterface can have private methods specified.
- ++1.+Write a class about a book which has following properties: • isbn • price • titleIn a Test class we are supposed to create objects as below: Book b1= new Book(); Book b2= new Book(544444, “Java”); Book b3= new Book(54444444, C++, 5.6); Book b4= new Book (“Python, 7.9, 8888899988); and we are supposed to print objects with the following statement: 5. System.out.println(b3); The the output should be:“Title of the book is C++, ISBN is 54444444”, price is 5.6 TL Now complete the Book class that enable to execute statements that mentioned in the Test class. Except the 5 items that mention above, please test: 6. Test the f(n) with 2 different numbers 7. Update the price of the b4 object.8. Test the Q3 method.m..Please in pyth coding with correct indentation 4a) Given that you have a Liquid class that can be initialized with any amount of gallons, liters, ounces, etc, write the first line of the method that will allow you to add together two Liquid objects using operator overloading. Again, write ONLY the first line (method definition) – you do NOT have to write the entire method. 4b) Given that you have L1 and L2 which are instances of the Liquid class, write a line of code that uses operator overloading to add them together and assign the result to L3.Reuse your Car class . In a main, build an object of that class, and print out the object using System.out.println(). Notice that this simply reports the memory address of the object in question, and we’d like to do something more useful. To replace (or override) the toString (or equals) function. Now, build a toString function that prints out the make, model, and odometer reading for a vehicle object. public class Car { //instance variables private int odometer; private String make; private String model; //overloading //constructors public Car(int odometer,String make, String model) { this.odometer = odometer; this.make = make; this.model = model; } public Car(String make, String model) { this.make = make; this.model = model; } public Car(String make) { this.make = make; } /* *getter & setter methods */ public int getOdometer() { return odometer; } public void…