Design a class named LinearEquation for a 2x2 system of linear equations: ax + by = ecx + dy = f x = (ed - bf)/(ad - bc ) y = (af - ec)/(ad-bc) The class contains:■ The private data fields a, b, c, d, e, and f with get methods.■ A constructor with the arguments for a, b, c, d, e, and f.■ Six get methods for a, b, c, d, e, and f.■ A method named isSolvable() that returns true if is not 0.■ The methods getX() and getY() that return the solution for the equation.Draw the UML diagram for the class, and then implement the class. Write a test program that prompts the user to enter a, b, c, d, e, and f and displays the result. If is 0, report that “The equation has no solution.”

Design a class named LinearEquation for a 2x2 system of linear equations: ax + by = ecx + dy = f x = (ed - bf)/(ad - bc ) y = (af - ec)/(ad-bc) The class contains:■ The private data fields a, b, c, d, e, and f with get methods.■ A constructor with the arguments for a, b, c, d, e, and f.■ Six get methods for a, b, c, d, e, and f.■ A method named isSolvable() that returns true if is not 0.■ The methods getX() and getY() that return the solution for the equation.Draw the UML diagram for the class, and then implement the class. Write a test program that prompts the user to enter a, b, c, d, e, and f and displays the result. If is 0, report that “The equation has no solution.”

EBK JAVA PROGRAMMING

9th Edition

ISBN:9781337671385

Author:FARRELL

Publisher:FARRELL

Chapter11: Advanced Inheritance Concepts

Section: Chapter Questions

Problem 19RQ

See similar textbooks

Similar questions

Design a Java class named LinearEquation for a 2-by-2 system of linear equations:ax + by = e x=(ed-bf)/(ad-bc)cx + dy = f y=(af-ec)/(ad-bc) The class contains:• Private double data fields a, b, c, d, e, and f.• A constructor with the arguments for a, b, c, d, e, and f.• Six getter methods for a, b, c, d, e, and f.• Methods getX() and getY() that return the solution for the equation.• A method named isSolvable() that returns true if ad - bc is not 0. The method isSolvable() willbe called in the main, if it returns true display the calculated values for x and y by calling getX()and getY(). If the call to isSolvable() returns false, display a message that “the equation has nosolution”. Write a Java program that prompts the user to enter a, b, c, d, e, and f and displays the result. After the valuesfor a through f are entered, create a LinearEquation object. Check to seeIf ad - bc is 0, report that “The equation has no solution”, otherwise print out the values for x and y.
Write a generic class of Shape with the attribute of center and operation to calculate area. Inherit the classes of Circle, Triangle, and Square such that the operation to calculate area has dynamic late binding. Write these classes such that Shape is an abstract class whereas all others are concrete classes
The Doctor program described in Chapter 5 combines the data model of a doctor and the operations for handling user interaction. Restructure this program according to the model/view pattern so that these areas of responsibility are assigned to separate sets of classes. The program should include a Doctor class with an interface that allows one to obtain a greeting, a signoff message, and a reply to a patient’s string. To implement the greeting, define a method named greeting for the Doctor class. To implement the signoff message, define a method named farewell for the Doctor class. Both greeting and farewell should return a string with a greeting or farewell message respectively. The reply function is defined for you, it should be added as a method for the Doctor class. The rest of the program, in a separate main program module, handles the user’s interactions with the Doctor object. Develop this program with a terminal-based user interface. Note: The program should output in the…
write program in java Design an abstract class GeometricObject. GeometricObject must ensure that its children must implement calcArea() method. Design RectangleYourRegNo and CircleYourName Classes as children of GeometricObject class with overridden toString() method to return “Rectangle with w Width and h Height is drawn” OR “Circle with r Radius is drawn”. The attributes of Rectangle are length, width. The attribute of Circle is radius Hint: Area of circle=πr2 , Area of rectangle= width*length
In three sentences, explain why it's preferable to have accessors for private types rather than public types.
Use the aggregation (composition) concept to define and implement the class line(p1.x, p1.y, p2.x, p2.y) by using two points variables P1, and P2 of type point2D class defined in Q1. Beside the two points P1 and P2, the line class has the following functions: print(), MoveRel(Dx,Dy) (use the point2D’s MoveRel(Dx,Dy) function of the two points to achieve that), line(), line(x1,y1,x2,y2), line(P2D1,P2D2). * Your answer
a) Implement a class Point with three attributes, x, y, and z.b) Implement an init method with an optional parameter type: 1) Set the default value of x, y, and z to 0.c) Implement a display method to print the values of x, y, and z as the example output below.d) Instantiate two objects of type Point, one with arguments,1, 2, and 3, and the other one without any arguments.e) Call display() to print x, y, and z. Example Output(x, y, z): (1, 2, 3)(x, y, z) : (0, 0, 0)
Modify the GeometricObject classto implement the Comparable interface and define a static max method in theGeometricObject class for finding the larger of two GeometricObject objects.Draw the UML diagram and implement the new GeometricObject class. Writea test program that uses the max method to find the larger of two circles, the largerof two rectangles.
We have a parking office class for an object-oriented parking management system using java Add (implement )a function to the Parking Office class to return a collection of customer ids (getCustomerIds) using java I have attached two class diagrams with definitions of all related classes in our system (i.e car, customer, .....). N.B. Parking office methods in the class definition like register, getcustomer and addcharge have already been implemented, we just need an additional getcustomerID function as mentioned above Explain the code you wrote with a few words
suppose there is a class Roster. Roster has one variable, roster, which is a list of tuples containing the names of students and their numerical grades- for example, [('Richard',90), ('Belle',67), ('Christine',85), ('Francine',97)]. Roster has a function findValedictorian that returns the name of the student with the highest grade. Find the valedictorian of the Roster object englishClass and store it in the variable valedictorian.
Write a program in C that simulates a checkout line at a supermarket. The line is a queue object. Customers (i.e.,customer objects) arrive in random integer intervals of 1–4 minutes. Also, each customer is served in randominteger intervals of 1–4 minutes. Obviously, the rates need to be balanced. If the average arrival rate is largerthan the average service rate, the queue will grow infinitely. Even with “balanced” rates, randomness can stillcause long lines. Run the supermarket simulation for a 12-hours a day (720 minutes) using the followingalgorithm:1. Choose a random integer from 1 to 4 to determine the minute at which the first customer arrives.2. At the first customer’s arrival time: Determine customer’s service time (random integer from 1 to 4);Begin servicing the customer. Schedule arrival time of next customer (random integer 1 to 4 added to the current time).3. For each minute of the day: If the next customer arrives, Say so, Enqueue the customer.Schedule the arrival time of…
Can help with this in c++The base class is given Base: class Base { int a;double b;public:Base (int _a, double _b) : a(1), b(2.5) {}Base (int _a, double _b) :a(_a), b (_b) {}double calct () {return 1.5*a+2*b;}string toString(){return "a="+to_string(a) + "b=" + to_string(b);}};Define a class Derived, successor to Base, with an additional field d of type double. For Derived, write constructors, write a new implementation of the calc () method to add to the sum and field d with coefficient 3 and the toString () method, which returns the text description of an object of class Derived.Create objects of class Derived with the written constructors and call the two variants of the methods calc () and toString () (of the class Derived and its base class Base)