Class Library implements the interface Findable and has/should have the following members: - Instance variable Map books (maps the name of the book to the total number of pages in the book). - A constructor to initialize the instance variable. -Override method find (T obj) to search for books with total pages more than or equal to that of obj. Class Test has the main method. - main() method accepts inputs to instantiate an object of Library. For each book, the input.is accepted in the order-book name followed by the number of pages in the book.
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- Design a LandTract class that has two fields (i.e. instance variables): one for the tract’s length(a double), and one for the width (a double). The class should have: a constructor that accepts arguments for the two fields a method that returns the tract’s area(i.e. length * width) an equals method that accepts a LandTract object as an argument. If the argument object holds the same data (i.e. length and width) as the calling object, this method should return true. Otherwise, it should return false. a toString method (that returns a String representation of the tract’s length, width, and area). Demonstrate the class in a program by creating an array of three LandTract objects initialized with user input. Then, print the info of the LandTract objects stored in the array by invoking the toString method (implicitly or explicity). Also, use the equals method to compare at least two LandTract objects and print wether they are of equal size or not. Sample Output:…public class date { private int day; // from 1 to 31 private int month; // from 1 to 12 private int year; // from 2000 upwards public void advance (); // move to next day }; Implement a constructor that initializes new objects of date class to be set to the 1st of January 2000. Implement setters for day, month, and year. Implement the advance method, which moves to the next day, ensuring that all data members are updated appropriately.Python Define the Student class that has two attributes: name and gpa Implement the following instance methods: A constructor that sets name to "Defualt name"(What ever you want to give) and gpa to 1.0set_name(self, name) - set student's name to parameter nameget_name(self) - return student's nameset_gpa(self, gpa) - set student's gpa to parameter gpaget_gpa(self) - return student's gpaEx. If a new Student object is created, the default output is: Default name/1.0Ex. If the student's name is set to "Frank" and the gpa is set to 3.7, the output becomes: Frank/3.7
- Define the Student class that has two attributes: name and gpa Implement the following instance methods: A constructor that sets name to "Defualt name"(What ever you want to give) and gpa to 1.0 set_name(self, name) - set student's name to parameter name get_name(self) - return student's name set_gpa(self, gpa) - set student's gpa to parameter gpa get_gpa(self) - return student's gpa Ex. If a new Student object is created, the default output is: Default name/1.0 Ex. If the student's name is set to "Frank" and the gpa is set to 3.7, the output becomes: Frank/3.7The Factory method design pattern is useful since it can be used to create new objects of a particular type dynamically. True Falseis a construct that defines objects of the same type. A class An object A method A data field
- 1 - Student class Make a class student (in student.py) that stores the following information for a student: Name (name) Student number (student_nr) Points per assignment (points_per_assignment) Exam grade (exam_grade) a) Behind each point of information is the name of the parameter to the initializer method. Store this information from the parameters in the object attributes with the same name. b) Add a method course_points() which returns the number of course points the student has gotten. Example: mary = Student("Mary", 15789613, [10, 9, 8, 10, 9, 10], 9)print(mary.course_points()) > 121 The calculation of the course points is explained in the course overview, course setup slides (Links to an external site.) and the first lectureLinks to an external site.. c) Add a method grade() which returns a the final grade of the student, rounded to nearest half (upwards, 6.75 -> 7). As per regulations, a 5.5 becomes a 6. If the student did not pass both the assignments (>= 95…Code the StudentAccount class according to the class diagramMethods explanation:pay(double): doubleThis method is called when a student pays an amount towards outstanding fees. The balance isreduced by the amount received. The updated balance is returned by the method.addFees(double): doubleThis method is called to increase the balance by the amount received as a parameter. The updatedbalance is returned by the method.refund(): voidThis method is called when any monies owned to the student is paid out. This method can onlyrefund a student if the balance is negative. It displays the amount to be refunded and set thebalance to zero. (Use Math.abs(double) in your output message). If there is no refund, display anappropriate message.Test your StudentAccount class by creating objects and calling the methods addFees(), pay() andrefund(). Use toString() to display the object’s data after each method calledCreate the following class diagram: The print method in: - Author prints the Authors data - Page prints page no and text - Textbook prints the subject and all pages - Novel prints the genre and all pages The toString method in: - Book returns title and authors - textbook returns subject in additions to super toString - Novel genre in additions to super toString Test your implementation create objects of different types example : - Create a book of type Novel which has many pages and several authors - Create a book of type Textbook which has many pages and several authors - Access these objects polymorphically, variable of class book contains objects of its subclasses Textbook and novel - Print a hall book - Print a single page of a book - Print the book and its authors
- Modified Circle class and test file: Add a new attribute for color (or any other new attribute) Add get/set methods for this new instance variable, including data validation in set method (assuming background is black, i.e. circle color can't be black, reset to any non-black color if black is entered ). Add a new constructor to pass the color attribute as an argument. Add an instance method to display all properties of a Circle object. Create 2 objects using different constructors in test file, with invalid data. Use this test java file test java file: class CircleTest{ public static void main(String[] args){ int num = 10; Circle c1 = new Circle(0.001); Circle c2 = new Circle("black", -9); c1.display(); c2.display(); c1.setRadius( -1); c1.setColor("black"); c1.display(); }}Create an automobile class that will be used by a dealership as a vehicle inventory program. The following attributes should be present in your automobile class: private string make private string model private string color private int year private int mileage Your program should have appropriate methods such as: default constructor parameterized constructor add a new vehicle method list vehicle information (return string array) remove a vehicle method update vehicle attributes method. All methods should include try..catch constructs. Except as noted all methods should return a success or failure message (failure message defined in "catch"). Create an additional class to call your automobile class (e.g., Main or AutomobileInventory). Include a try..catch construct and print it to the console. Call automobile class with parameterized constructor (e.g., "make, model, color, year, mileage"). Then call the method to list the values. Loop through the array and print to the screen.…A SuperDie Class Write a class SuperDie that models a single die with an arbitrary number of sides, not just six. A die instantiated with the default constructor has six sides. The methods of this class should be: • roll a die and return its value, • return the number of sides on a die, and • change the number of sides on a die. Include a main(...) method that tests all the methods of your class.