Define the object Circle in a class, considering that the circle has a center coordinates x and y and a radius r. The class can find the area (PI^2 * r) and a perimeter (2*PI*r)
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Define the object Circle in a class, considering
that the circle has a center coordinates x and
y and a radius r. The class can find the area
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- Shape -width: double -length: double +allmutatorMethods Shapes2D Shapes3D -height:double *calSize():double +calVolume():double 1. Define class Shape, 2DShape and 3DShape as per UML class diagram given. 2. Define all mutator methods(set and get) for all classes. 3. Define methods calArea() with formula area - width * length for 2DShapes. 4. Define methods calArea() with formula calvolume, volume = width*length*height for 3DShapes. In the main program, declare and set data in 1 object of 3DShapes. Create an array OR ArrayList of 2DShapes, set and display the info of all objects as shown in the output. 5.Shape Classes Design classes Square, RightTriangle , and Triangle that encapsulate three geometric shapes. Each class should implement a method void draw (int x, int y) that “draws" a square, a right triangle, or an equilateral triangle (a triangle with three equal sides), respectively. See Figure 2. The parameters x and y specify the relative position of the figure: y lines down and x spaces acro from the current position of the screen cursor. The instance variables of each class are: int rows , the number of rows that comprise the figure, and char character , the keyboard character used for drawing the figure. Each shape of Figure 2 consists of five rows. The drawing characters are *** for the square, %' for the right triangle, and #' for the equilateral triangle. Shape (abstract) int rows char character Shape() Shape(int x, char c) int get rows() char getCharacter() void setRows(int x) void setCharacter(int x) void draw(int x, int y) (abstract) Square() Square(int x, char ch) void…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.
- Computer Science You are required to develop a small chatting application where two or more friends can communicate each other through messages. Create a class Message which has Date d, and message (string). Provide getters/setters, constructors, toString. Create a class Friend having String name, String contact, email and ArrayList of Messages provide getters/setters, constructors, toString addMessage(Message m) method which will add new message to the list. Provide following options to the user using JFrame. Login which will help user login to the application. View Friends (Display List of All Friends) View Messages ( This should display all message of a Friend) Send message (This should ask for friend name and message match the friend name and write that message to the array list).Java - Access Specifiers Create a class named Circle that has attributes radius, area, and circumference and make the attributes private. Make a public method that sets the radius and a method that prints all attributes. Ask the user input for radius. Note: Use the PI from the math functions Inputs A line containing an integer 10 Sample Output Radius: 20 Area: 1256.64 Circumference: 125.66Code 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 called
- Design a class Circle with the following Private double data for radius One no arg constructor One constructor with parameters One method to find area Getter and setter Write a program to create 2 objects with values of radius = 5.5 and 6.5 Print the radius and area of each object. Show the use of get and set methods %3DJAVA PROGRAMMING Write two java files for this assignment: Circle.java, and Main.java. The Circle.java file will create an actual class. The Circle class: MEMBER VARIABLE double radius double x double y Eight methods: Six of the methods are simple: getter’s and setter’s for x, y, and radius. There should also be a getArea method that returns the area (derived from the radius) A doesOverlap method. This method should accept a Circle as an argument, and return true if this circle overlaps the circle that the method was invoked on. [Note: two circles overlap if the sum of their radius' is greater than or equal to the distance between their centers.] void setX(double value) double getX() void setY(double value) double getY() void setRadius(double value) double getRadius() double getArea() boolean doesOverlap(Circle otherCircle) second class will be the typical replit Main class, with its static main method .It should contain code that tests the Circle class. submit code that…Design and implement a class called Car that contains instance data that represents the company, price, model, and year of the car. Define the Car constructor to initialize these values. Include getter and setter methods for all instance data, and a toString method that returns a one-line description of the car. Create a driver class called CarTest, whose main method instantiates array of Car objects and write the following methods: 1) Methods that receives an array of cars and a string called co and returns an array that contains cars whose company equal to co. 2) A Method called getTopByCompany that receives an array of Cars and then returns an array of cars containing the cars that have the highest price compared with cars from the same company.
- Shape Class JAVA Implement the Shapehierarchy shown in figure below. Shape TwoDimensionalShape ThreeDimensionalShape Circle Square Sphere Cube Each TwoDimensionalShape should contain method getArea to calculate thearea of the two-dimensional shape. • Each ThreeDimensionalShape should have methods getArea and getVolume tocalculate the surface area and volume, respectively, of the three- dimensional shape. Add OneDimensionalShape with sub classes , and add more shapes to classes (TwoDimensionalShape , ThreeDimensionalShape ). Create a program that uses an array of Shape references to objects of each concrete class in the hierarchy. The program should print a text description of the object to which each array element refers. • Also, in the loop that processes all the shapes in the array, determine OneDimensionalShape, whether each shape is a TwoDimensionalShape or a ThreeDimensionalShape. If it is a TwoDimensionalShape, it is display ThreeDimensionalShape, display its area and volume. its…public class StairViewer public static void main(String(] args) // Step 2: Create a rectangle and draw it as the // top step of the stair // location: (20, 10) // size: (20, 20) 18 // Step 3: Create a rectangle and draw it as the 19 // middle step of the stair 20 // location: below the top step, aligned on left // size: (40, 20) 21 22 23 24 // Step 4: Create a rectangle and draw it as the 25 // bottom step of the stair 26 // location: below the middle step, aligned on left // size: (60, 20) 27 28 29 30 } 31 32Fibonacci A fibonacci sequence is a series of numbers in which each number is the sum of the two preceding numbers. For example: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on… For this, you will implement a class that takes a positive integer (n) and returns the number in the nth position in the sequence. Examples When n is 1, the returned value will be 0. When n is 4, the returned value will be 2. When n is 9, the returned value will be 21. come up with the formula and base cases Implementation Create a class Fibonacci with a public static method getValue. Create a Main class to test and run your Fibonacci class.
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