1.The class has at least three fields 2.The Class should have a Methods and constructor 3. Instantiate or create 3 objects 4. Assign values to fields 5. Display all the properties - the values assigned on the fields.
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Write a java
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- 1. Complete the following tasks: a. Design a class named Circle with fields named radius, area, and diameter. Include a constructor that sets the radius to 1. Include get methods for each field, but include a set method only for the radius. When the radius is set, do not allow it to be zero or a negative number. When the radius is set, calculate the diamater and the area. Create the class diagram and write the pseudocode that defines the class. b. Design an application that declares two Circles. Set the radius of one manually, but allow the other to use the default value supplied by the constructor. Then display each Circle's values.Design a Book class that holds the title, author’s name, and price of the book. Books’s constructor should initialize all of these data members except the price which is set to 500/-. Create a display method that displays all fields. All Books are priced at 500/- unless they are PopularBooks. The PopularBooks subclass replaces the Bookprice and sets each Book’s price to 50,000/- through PopularBooks construcor. Override the display method to display all fields. Write a Main () method that declares an array of five Book objects. Ask the user to enter the title and author for each of the 5 Books. Consider the Book to be a PopularBook if the author is one of the following: Khaled Hosseini, Oscar Wilde, or Rembrandt. Display the five Books’ details.Design a Book class that holds the title, author’s name, and price of the book. Books’s constructor should initialize all of these data members except the price which is set to 500/-. Create a display method that displays all fields. All Books are priced at 500/- unless they are PopularBooks. The PopularBooks subclass replaces the Bookprice and sets each Book’s price to 50,000/- through PopularBooks construcor. Override the display method to display all fields. Write a Main () method that declares an array of five Book objects. Ask the user to enter the title and author for each of the 5 Books. Consider the Book to be a PopularBook if the author is one of the following: Khaled Hosseini, Oscar Wilde, or Rembrandt. Display the five Books’ details. c sharp
- 1. Create a class named Book and declare the fields author, title and pages with suitable field types. 2. Declare the constructor and initialize the fields author and title with the assigned constructor parameter. 3. Name the constructor parameter as your own. 4. Add two accessor methods to the class getAuthor, getTitle and getPagesthat return the author and title fields as their respective results. Add mutator method to change the pages of the Book class. 5. Add two methods, printAuthor and printTitle, to this Book class project. These should print the author and title fields, respectively, to the terminal window.Objectives: Use Javadocs to document a class and methods Design and write a Java class Use fields (instance variables) Write multiple constructors Write accessor methods Write mutator methods Use the this keyword Use string concatenation Round floating point numbers (using Math.round()) Use a Scanner object Description ProduceItem class For this project, you get to design and write a ProduceItem class that stores a description, cost and weight as fields. Include both a constructor without any parameters and one with parameters for the description (String), cost (double) and weight (double) (in that order). For the constructor without parameters, set the description to an empty string, the cost to 0.0 and the weight to 0.0. Include appropriate accessor and mutator methods (and label them with comments including the terms "accessor" or "mutator"). So that the test cases compile, name the accessor methods: getDescription() getCost() getWeight() Additionally, name the mutator methods:…Each tool in the toolbox represents a class from which an object can be instantiated. True False
- True or FalseIt is a common practice to make all a class’s fields private and to provide access to those fields through methods.An object is an ordered collection of properties. Question 9 options: True FalseRectangle Object Monitoring Create a Rectangle class that can compute the total area of all the created rectangle objects using static fields (variables). Remember that a Rectangle has two attributes: Length and Width. Implement the class by creating a computer program that will ask the user about three rectangle dimensions. The program should be able to display the total area of the three rectangle objects. For this exercise, you are required to apply all OOP concepts that you learned in class. Sample output: Enter Length R1: 1 Enter Width R1: 1 Enter Length R2: 2 Enter Width R2: 2 Enter Length R3: 3 Enter Width R3: 3 The total area of the rectangles is 14.00 Note: All characters in boldface are user inputs.
- 1- A variable of class type (i.e., object) always require the same amount of memory to store its values? False True 2- A class that contains no methods (other than constructors) that change any of the data in its object is called as: Mutable class Immutable class Anonymous class Class invariantA. Food Class1. The food class is defined by the three following properties: name of the item,amount of calories and the weight usually measured in grams.2. Create a constructor that takes as arguments the name, weight and amountof calories. Initialize the variable accordingly.3. You will need to retrieve the amount of calories later on. Add the necessarymethod.4. A toString method that returns the name of the item and its weight.Sample:100 grams of riceB. Meal Class1. The meal class is defined by two properties:a. Nameb. An ArrayList of Food objects that represents the food items of that specificmeal2. Create a constructor that takes as argument the name of the meal. Initializethe variables accordingly.3. Add the following methods to your class:a. addFood method that takes as argument a Food object and has noreturned value. The method adds a Food item to the ArrayList of foods. 5b. removeFood method that takes as argument a Food object and hasno returned value. The method removes the…Java - Constructors Create a class named Book that has the following attributes: Publisher - String Year Published - Integer Price - Double Title - String Create a constructor for the class Book that has the parameters from the attributes of the class. After, create a method for the class that displays all attributes. Ask the user for inputs for the attributes and use the constructor to create the object. Lastly, print the values of the attributes. Inputs 1. Publisher 2. Year Published 3. Price 4. Book Title XYZ Publishing 2020 1000.00 How to Win? Sample Output Published: ABC Publishing Year Published: 2022 Price: 150.00 Book Title: Stooping too low Stooping too low is published by ABC Publishing on 2022. It sells at the price of Php150.00.
