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- a. Write a FractionDemo program that instantiates several Fraction objects and demonstrates that their methods work correctly. Create a Fraction class with fields that hold a whole number, a numerator, and a denominator. In addition: Create properties for each field. The set access or for the denominator should not allow a 0 value; the value defaults to 1. Add three constructors. One takes three parameters for a whole number, numerator, and denominator. Another accepts two parameters for the numerator and denominator; when this constructor is used, the whole number value is 0. The last constructor is parameterless; it sets the whole number and numerator to 0 and the denominator to 1. (After construction, Fractions do not have to be reduced to proper form. For example, even though 3/9 could be reduced to 1/3, your constructors do not have to perform this task.) Add a Reduce() method that reduces a Fraction if it is in improper form. For example, 2/4 should be reduced to 1/2. Add an operator+() method that adds two Fractions. To add two fractions, first eliminate any whole number part of the value. For example, 2 1/4 becomes 9/4 and 1 3/5 becomes 8/5. Find a common denominator and convert the fractions to it. For example, when adding 9/4 and 8/5, you can convert them to 45/20 and 32/20. Then you can add the numerators, giving 77/20. Finally, call the Reduce() method to reduce the result, restoring any whole number value so the fractional part of the number is less than 1. For example, 77/20 becomes 3 17/20. Include a function that returns a string that contains a Fraction in the usual display format—the whole number, a space, the numerator, a slash (D, and a denominator. When the whole number is 0, just the Fraction part of the value should be displayed (for example, 1/2 instead of 0 1/2). If the numerator is 0, just the whole number should be displayed (for example, 2 instead of 2 0/3). b. Add an operator*() method to the Fraction class created in Exercise 11a so that it correctly multiplies two Fractions. The result should be in proper, reduced format. Demonstrate that the method works correctly in a program named FractionDemo2. c. Write a program named FractionDem03 that includes an array of four Fractions. Prompt the user for values for each. Display every possible combination of addition results and every possible combination of multiplication results for each Fraction pair (that is, each type will have 16 results).Creates a class Student with 3 attributes: name, id and level. a. Add a constructor able to create a Student; b. Add the methods getId and getLevel; c. Add the method display able to display the attributes,create two data members on each of the four classes we created (MyPoint, Mysegment, MyShape, and xyGroup). You also need a boolean, to declare it picked, and a color to paint it. also create a method called select (or pick). So we add the two new members, color and isselected:
- Create a class Course, which has one field: String courseName Create the constructor, accessor, and mutator for the class. Then, in the main method of this class, create an instance of the class with the name "CST1201". Write an equivalent while statement to replace the following for statement for (int i=2; i<100; i=i+2) { System.out.println(i); }Write a class CountObject which has a method namenumberfoObjects() which returns the number of objects been created ofthat class. Also write a class that will create few objects of CountObjectclass and show the count. (Hint: you have to use static variable inCountObject class).Complete the Course class by implementing the findStudentHighestGpa() method, which returns the Student object with the highest GPA in the course. Assume that no two students have the same highest GPA. Given classes: Class Course represents a course, which contains an ArrayList of Student objects as a course roster. (Type your code in here.) Class Student represents a classroom student, which has three private fields: first name, last name, and GPA. (Hint: GetGPA() returns a student's GPA.) Ex: If the following students and their GPA values are added to a course: Henry Nguyen with 3.5 GPABrenda Stern with 2.0 GPALynda Robison with 3.2 GPASonya King with 3.9 GPA then the findHighestStudent() method returns a student and the program output is: Top student: Sonya King (GPA: 3.9)Code:Course.java: import java.util.ArrayList; //create class Student //create class Courseclass Courses{ private ArrayList<Student> roster; // collection of Student object // class constructor…
- This is for pygame. Block class The Block class inherits from Drawable and it will draw a square with a black outline at its current location. You must implement at the very least the required methods of the base class (draw and get_rect), as well as a constructor. You may need to implement other methods as part of the public interface. Put all this code in a file name Block.py This is the Drawable class.1: create a class Pentagon, which implements the RegularPolygon interface. It should have a double field called length, as well as a constructor that initializes this length field to a given value. 2: In the main() method of Pentagon class, add the following code: RegularPolygon sq = new Square(10); RegularPolygon penta = new Pentagon(20); Write code to get the perimeter for sq and penta. 3: In the main() method defined in Q2, add this line of code: sq.getArea(); Will this code pass through compiler? What is the reason? The Java feature in Q1 which create a new version of predefined method getPerimeter() is called Polymorphism Override Overload InheritanceCreate a class Fraction with two integer final fields: numeratorand denominator. Its constructor creates fractions when given valuesfor both, but it has to avoid fractions with null denominators by throwing aNullDenominatorException
- 1. Create a Student class that implements the Person interface. As well as storing the students name and email, also store their course grade (e.g A, B, C) in a member variable. The grade should be accessible via a getGrade method. For the implementation of getDescription return a message along the lines of “A C grade student”, substituting the students actual grade.2. Create a Lecturer class that implements the Person interface. This class should also store the subject that the lecturer teaches. Add a getSubject method, and implement getDescription so that it returns a suitable message, e.g. “Teaches Biology”.3. Create a third class, Employee that implements the interface. This should also store the name of the department the Employee works in (available via getDepartment). Again, getDescription should return a suitable message.A. Create a BankAccount class. We want to be able to create a new bank account, make deposits and withdrawals, and check the balance. Each bank account created should receive a unique account id, numbered sequentially 1001, 1002, 1003, and so on. We should be able to change the name on the account. We should also be able to retrieve the account id and the name on the account. Provide a constructor that takes a name for the account as a parameter. Remember that a constructor has the same name as the class. The constructor should initialize all of the instance variables. What does the class need to remember? Those are the instance variables. There should be three. Provide the following methods: public double getID() gets the account id of this BankAccount public double getBalance() gets the balance of this BankAccount public String getName() gets the name of this BankAccount public void setName(String newName) sets a new name for this BankAccount public void deposit(double…In Java The base class Pet has protected fields petName, and petAge. The derived class Cat extends the Pet class and includes a private field for catBreed. Complete main() to: create a generic pet and print information using printInfo(). create a Cat pet, use printInfo() to print information, and add a statement to print the cat's breed using the getBreed() method.