write a class called OneItemBag ( OneItemBag.java ). This class represents a bag that can hold any single type of object (decided at bag-creation time), and only one item of that type at a time. You may have a zero-parameter constructor if you want one, but you must have the following three features: 1. a method that puts an item in the bag (addItem()) which returns whether or not it was successfully added 2. a method that removes an item from the bag and returns it (removeItem()), return null if there is no item 3. a method to check if an item is in the bag (hasItem()) which returns true or false

write a class called OneItemBag ( OneItemBag.java ). This class represents a bag that can hold any single type of object (decided at bag-creation time), and only one item of that type at a time. You may have a zero-parameter constructor if you want one, but you must have the following three features: 1. a method that puts an item in the bag (addItem()) which returns whether or not it was successfully added 2. a method that removes an item from the bag and returns it (removeItem()), return null if there is no item 3. a method to check if an item is in the bag (hasItem()) which returns true or false

Programming Logic & Design Comprehensive

9th Edition

ISBN:9781337669405

Author:FARRELL

Publisher:FARRELL

Chapter11: More Object-oriented Programming Concepts

Section: Chapter Questions

Problem 1GZ

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Slide Type Slide • Exercise # 1: Define a class Point that represents a point in 2 – D plane. The point has x and y coordinates. Define the following: • A constructor to initialize the x, y coordinates. • A method translate(self, dx,dy) to translate the point object dx , and dy units in x and y directions, respectively. • A method distanceTo (self, point2) to return the distance between the point referenced by self and point2. • getX(self) to return the value of x coordinate. • getY(self) to return the value of y coordinate Test the above class by: • Creating 2 point objects; one with (3,5) as x,y coordinates; the second with (-10,30) as x,y coordinates. • Move the first point 5.5 units in x direction and -12.5 units in y direction using translate method • Find the distance between the 2 points in their current location using distance To method A Sample output resulting from running the above test class is shown below new coordinates of point1= (8.5 , -7.5) Coordinates of point 2 =…
Write a method toString() for the Cow class which displays information about a Cow object. The method should consider the following: • If the Cow's stomach value is 100, the output should say that the Cow is full • If the Cow's stomach value is below 100 but above 50, no information about the Cow's stomach should be given • If the Cow's stomach value is below 50 but above 10, the output should mention that the cow is hungry • If the Cow's stomach value is below 10, the output should mention that the cow is starving. Example output: First Cow is full. Second Cow Third Cow is hungry. Fourth Cow is starving!
java You are part of a team writing classes for the different game objects in a video game. In this assessment you are given a superclass (Human.java), two subclasses (Warrior.java and Wizard.java) and a test application (TestGameObjects.java). Both the Warrior and the Wizard classes need to be able to calculate stealth. This needs to be done in the method getStealth. This method has an integer parameter (dexterity) and returns an integer. Refer to the test application to see how the method is used. The Warrior and Wizard classes calculate stealth differently: The Warrior's stealth is equal to dexterity times strength (dexterity * strength) while the Wizard's stealth is equal to three times dexterity times intelligence (3 * dexterity * intelligence). You need to write an interface with the method getStealth, and then modify the superclass and subclasses to implement this interface. You also need to test the validity of the object ID. The object ID must consist of the character 'W'…
You are required to implement a shopping cart module for an online shopping mall. From the available items auser will select the item to purchase and add this into his shopping cart. Before the checkout customer canremove any item from the cart at any time.A single item in the cart contains the following details:class Item{private:int itemID;string itemName;double price;double purchasedQuantity;double totalPrice;public://constructors and getter setters};For the implementation of the required module you have to meet the following requirements:1- Customer can add any item to the cart in desired quantity.Remember if customer added the same item in the cart again, your implementation will not add this as a newitem it will check if the item already exists than it will just add the new quantity in the previous and updateother data.2- Customer can remove item or change the quantity at any time.There are two possibilities:i. Customer wants to remove the item form the cartii. Customer wants to…
Code In Java NetBeans Q: Create an Inventory system program which has the following classes: A) . A Date class that includes three instance variables, a month, a day, and an year. Provide a constructor that initializes the three instance variables, validating the values. Provide a toString method that displays the day, month, year separated by the forward slash(/).
Modify the student class presented in this chapter as follows. Each student object should also contain the scores for three tests. Provide a constructor that sets all instance values based on parameter values. Overload the constructor such that each test score is assumed to be initially zero. Provide a method called setTestScore that accepts two parameters: the test number (1 through 3) and the score. Also provide a method called getTestScore that accepts the test number and returns the appropriate score Provide a method called average that computes and returns the average test score for this student. Modify the toString method such that the test scores and average are included in the description of the student. Modify the driver class main method to exercise the new Student methods. (Java)
Modify the student class presented in this chapter as follows. Each student object should also contain the scores for three tests. Provide a constructor that sets all instance values based on parameter values. Overload the constructor such that each test score is assumed to be initially zero. Provide a method called setTestScore that accepts two parameters: the test number (1 through 3) and the score. Also provide a method called getTestScore that accepts the test number and returns the appropriate score Provide a method called average that computes and returns the average test score for this student. Modify the toString method such that the test scores and average are included in the description of the student. Modify the driver class main method to exercise the new Student methods. (c++ language)
Create a class Animal with a constructor that takes no parameters and has an instance variable: private int energy; When an animal is "born," it has one unit of energy. It has the methods: public void eat(int amountToEat) - which increases the amount of energy the animal has by amountToEat public void move(int amountToMove) - which decreases the energy the animal has by amountToMove. public int getEnergy() - which returns the amount of energy left Notice there is no setEnergy method. Energy is only changed by eating or moving. You should also create a subclass BetterAnimal which has a cap on the amount of energy an animal can have. The constructor takes a parameter that specifies a maximum for energy. You will need to save this in another instance variable. Override the eat and move methods In the eat method: If the amount the BetterAnimal eats would set its energy above the max, the energy level is only increased to the max. Also energy is only changed if the amount > 0 In…
You will create a couple of classes that could be used to create a Text Adventure game. The class will be called "Item" and will represent an item in the game that can be carried and used by a player (such as a weapon or a tool). The Item Class The Item class will have only one property: A string description. The Item class will have exactly 3 methods: There will be a default constructor that takes no parameters. This constructor will give a generic, default description of the Item. There will be a constructor that takes a string parameter, and it will initialize the Item's description based on the parameter. There will be a method called "print" that will print the Item's description to standard output. PLEASE MAKE SURE ITS POSSIBLE TO COMPILE WITH THIS CODE. THANKS. #include "Item.h" #include <iostream> #include <string> using namespace std; int main() { Item sword("Sword of Destiny"); Item potion("Healing Potion"); Item key("Key of Wisdom"); string name; cout…
In Java Language Create a CheckingAccount class to represent a checking account This class inherits from the Account class that you've created so far and has one new attribute, the overdraft limit, specifying how much the account can be overdrawn by. For example, if you have $100 in the account and you try to withdraw $150. This would be fine, if your overdraft limit was $50, meaning you can overdraw your account by $50 without penalty. Note: All you're doing at this stage is creating the limit, don't worry about dealing with the overdraft yet. You just want a variable at this stage. Your CheckingAccount class should also have getters and setters for the overdraft attribute and a constructor, but keep in mind how constructors work with inheritance. No other methods or adjustments are to be made at this time. Write a driver (or use your existing one) to test your CheckingAccount class by creating at least 1 instance and printing out its overdraft limit by using the getter.
in Java Part 1 : Start by creating a new class called MyPoint that can be initialized with either of these constructors: MyPoint p1 = new MyPoint(); MyPoint p2 = new MyPoint(2.0, 4.0); The two arguments given to the constructor are x (2.0) and y (4.0) co-ordinates. Don’t forget to include getters and setters as these should be private instance variables! Part 2 : Create a toString() instance method that prints out the co-ordinates of the point. Add two instance methods that return the Euclidean distance to another point, or to another (x, y) coordinate. Example: double distance = p2.distance(p1); The Euclidean distance between two points is: d=√x^2 + y^2 You will need to make use of methods from the Math package: https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Math.html Test your constructors and the new methods. Part 3 : Create a class method, contains(MyPoint[] points, MyPoint p), that checks if the point p is in the array points and returns a boolean.…
In Java Write a CashRegister class that can be used with the RetailItem class that you wrote inChapter 6’s Programming Challenge 4. The CashRegister class should simulate the sale ofa retail item. It should have a constructor that accepts a RetailItem object as an argument.The constructor should also accept an integer that represents the quantity of items beingpurchased. In addition, the class should have the following methods:• The getSubtotal method should return the subtotal of the sale, which is the quantitymultiplied by the price. This method must get the price from the RetailItem objectthat was passed as an argument to the constructor.• The getTax method should return the amount of sales tax on the purchase. The salestax rate is 6 percent of a retail sale.• The getTotal method should return the total of the sale, which is the subtotal plus thesales tax.Demonstrate the class in a program that asks the user for the quantity of items being purchased,and then displays the sale’s…