Consider the following class named BankAccount: public class BankAccount { private double balance; public void setBalance (double bal) { balance = bal: } public double getBalance() { return balance: } } Use the above class and write statements to do following: a) To declare an object named myaccount b) To store $1000 in the balance field of myaccount object created above. c) To display the value of the balance of myaccount object.
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- Given the following code for a class named Employee, complete the following constructor public class Employee ( private int employeeID; private int SSN; public Emplyee(int employeeID, int SSN) {Assume method testQuestion() is a method in the Purchase class. Assume the Purchase class has a constructor that has parameters of name, groupCount, groupPrice, and numberBought. public Purchase testQuestion(Purchase p1, int newX) { newX = 20; this.setName("green beans"); p1.setName("corn"); Purchase p2 = new Purchase("broccoli", 5, 4.50, 10); return p2; } Referring to the above method, list the output that would be printed by Sysyem.out.println() when the following PurchaseDemo2 is executed. public class PurchaseDemo2 { public static void main(String[] args) { Purchase tomsPurchase = new Purchase("squash",4,3.50,6 ); Purchase jillsPurchase = new Purchase("carrot",8,1.99,4 ); Purchase billsPurchase;…Please help me with this using java. And comment the code The following is some code designed by J. Hacker for a video game. There is an Alien class to represent a monster and an AlienPack class that represents a band of aliens and how much damage they can inflict: class Alien { public static final int SNAKE_ALIEN = 0; public static final int OGRE_ALIEN = 1; public static final int MARSHMALLOW_MAN_ALIEN = 2; public int type; // Stores one of the three above types public int health; // 0=dead, 100=full strength public String name; public Alien ( int type , int health, String name) { this.type = type; this.health = health; this.name = name; } } public class AlienPack { private Alien[] aliens; public AlienPack (int numAliens) { aliens = new Alien[numAliens]; } public void addAlien(Alien newAlien, int index) { aliens[index] = newAlien; } public Alien[] getAliens() { return aliens; } public int calculateDamage() { int damage = 0; for (int i=0; i < aliens.length; i++) { if…
- Create a base class called Vehicle with name, max_speed, and tank_size attributes. Then create a derived class called Truck that inherits from the Vehicle class. The Truck should have an additional attribute called seating_capacity with default value of 5. The child class should have a method named range to calculate fuel efficiency - the calculation should be: max_speed * seating_capacity * tank_size. Override the method such that it can accept 1, 2 or 3 positional arguments. Attached is my following code, also attached is a method for override method. Need help implementing the override method for the range to calculate the fuel effiency.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.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…
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- Question Create a class called Quadratic for performing arithmetic on and solving quadratic equations. A quadratic equation is an equation of the form ax2 + bx + c = 0 Where a !=0. Use double variables to represent the values of a, b, and c and provide a constructor that enables objects of this class to be initialized when they are created. Give default values of a = 1, b = 0, and c = 0. Create a char variable called variable to represent the variable used in the equation and give it a default value of x. The constructor should not allow the value of a to be 0. If 0 is given, assign 1 to a). Provide public member functions that perform the following tasks. add—adds two Quadratic equations by adding the corresponding values of a, b, and c. The function takes another object of type Quadratic as its parameter and adds it to the calling object. subtract—subtracts two Quadratic equations by subtracting corresponding values of a, b, and…Could this please be written in C++ 11, thanks ! Design a "Tips" class that calculates the gratuity on a restaurant meal. Its only class member variable, "taxRate", should be set by a one-parameter constructor to whatever rate is passed to it when a "Tips" object is created. If no argument is passed, a default tax rate of .085 should be used. The class should have just one public function, "computeTip". This function needs to accept two arguments, the total bill amount and the tip rate. It should use the total bill amount, along with the value stored in the "taxRate" member variable, to compute the cost of the meal before the tax was added. It should then apply the tip rate to just the meal cost portion of the bill to compute and return the tip amount. Demonstrate the class by creating a program that creates a single "Tips" object, and then has a sentinel-controlled loop to let the user retrieve the correct tip amount using various bill totals and desired tip rates.In the board game Scrabble, each tile contains a letter, which is used to spell words in rows and columns, and a score, which is used to determine the value of words. The point of this exercise is to practice the mechanical part of creating a new class definition: Write a definition for a class named Tile that represents Scrabble tiles. The instance variables should be a character named "letter" and an integer named "value".