Create a class diagram of the attached Java program. Turn-in a screen capture of your diagram. 7class A {8.void callme () {System.out.println("Inside A's callme method");10}11}12Eclass B extends A {13void callme () {14System.out.println("Inside B's callme method");15}16}17Ec.ss C extends A {18void callme () {19System.out.println("Inside C's callme method");20}21}22ạclass dispatch {23public static void main(String args[]) {24A a = new A();вь= new B () ;26C Cnew C();27A r;/ obtain a reference of type A28r = a;29r.callme ();30r = c;31r.callme ();3233N N N N N N N m M M m

Answered: reate a class diagram of the attached…

Engineering

Computer Science

reate a class diagram of the attached Java program. Turn-in a screen capture of your diagram

EBK JAVA PROGRAMMING

9th Edition

ISBN:9781337671385

Author:FARRELL

Publisher:FARRELL

Chapter11: Advanced Inheritance Concepts

Section: Chapter Questions

Problem 3PE

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1. Creating overloaded methods with identical sets of parameters and different return types result in compilation errors. Overloaded methods must have different sets of parameters- also known as signatures. Is it True or False? 2. Attempting to modify a final instance variable after it is initialized is a compilation error. Is it True or False? 3. A subclass can effect state changes in superclass private members only through public, protected methods provided in the superclass and inherited into the subclass. Is it True or False?
Fill in the blank space 1. The ____________ keyword is used to create a new instance or object of a class 2. ______________ is the concept of closely controlling access to an object's attributes and is also called information hiding 3. A ____________ is a method that is used 5o set the initial state of an object when it is created. 4. (i) Method _________ is the process of changing the number and type of parameters of a method (ii) Method __________ is the process of replacing a method in a superclass with a new implementation in the subclass 5. A ______________ expression is an expression that evaluates to either true or false. 6. In Java polymorphism means that a class or object can be treated as multiple different types. Which of the following statements regarding polymorphism in Java are true? Select all that apply. A. A subclass can be treated as any of it's ancestor (super) classes. B. A Java class can be treated as any interface it implements C. A Java class can be treated…
Write a class named Employee which implements Comparable Interface with name and salary as data field. Add a constructor with argument name and salary. Add getter and Setter for name and salary. Add CompareTo() method for the data Name. Write a class named Manager which inherits the Employee class. Add an instance variable, named department, of type String. Add a constructor in the subclass class with arguments name, salary, department and a toString() method that prints the manager’s name, department, and salary [Hint: Add a toString( ) method in the super class as well] Create 3 objects of Manager with following arguments 1. (Zayed, 500), 2. ( Ahmed, 700) 3. ( Faisal, 600) Create an Array object Add the above 3 objects into an Array object and Sort by Name and Display Create an object Employee class with argument (Zayed, 500, IT) Display the 1. Name 2. Salary 3. Department by using tostring() method.
In Java: Implementing a Superclass Employee Part 1: Implement a superclass Employee that has the following fields and methods. Fields: string firstName string lastName int employeeID double salary Methods: constructor method - initialize salary field to zero. setters and getters for firstName, lastName, and employeeID employee Summary method - prints all account attributes Part 2: Implement a Manager class that inherits from the Employee class. Fields: string department a Methods: employeeSummary method - prints all superclass and subclass attributes Ensure that your program has the two required classes and a test class.
Java program * Interfaces 1. Modify the class Rectangle to implement the Comparable interface, as shown in the following UML class diagrams. Apply the required changes in the class’s header.2. Then, in the Rectangle class override the method compareTo(), so if this object’s area is greater than the specified (given through the parameter) object’s area return 1, if it is less than return -1, and 0 otherwise. 3. Create a test class named Test2. Then complete the following tasks: a. Create an ArrayList and add to it 4 Rectangle objects with different width and height values. b. Print out the elements of the ArrayList. c. Sort the elements of the ArrayList using the static method sort of the class java.long.Collections. This would be possible only, if you implemented the method compareTo() correctly in the Rectangle class. d. After sorting the elements of the ArrayList, print the elements again. 4. Run the Test class. Here is the rectangle's class program public class Rectangle extends…
Write a class named Employee which implements Comparable Interface with name and salary as data fields Add a constructor with argument name and salary. Add getter and Setter for name and salary. Add CompareTo() method for the data Salary. Write a class named Manager which inherits the Employee class. Add an instance variable, named department, of type String. Add a constructor in the subclass class with arguments name, salary, department and a toString() method that prints the manager’s name, department, and salary [Hint: Add a toString( ) method in the super class as well] Create 3 objects of Manager with following arguments 1. (Zayed, 500), 2. ( Ahmed, 700) 3. ( Faisal, 600) Add the above 3 objects into an ArrayLIst object and Sort by Salary and Display. Create an object Employee class with (Zayed, 500,IT) and display the 1. Name 2. Salary 3. Department by using tostring() method.
create a uml class diagram on this code: class grey(object): def __init__(self, name): self.name = name def getName(self): return self.name class Rank(grey): def __init__(self, name, rank): grey.__init__(self, name) self.rank = rank def getRank(self): return self.rank class Specialty(Rank): def __init__(self, name, rank, specialty): Rank.__init__(self, name, rank) self.specialty = specialty def getSpecialty(self): return self.specialty s = Specialty("Derek","Attending","Neurosurgery")print(s.getName(),s.getRank(),s.getSpecialty())
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2. Import Classa) Implement a class Rectangle with two attributes, width and height. b) Implement an init method with an optional parameter type. Set the default value of the attributes of width and height to 1.c) Implement a display method to print the values of width and height.d) Implement a setWidth method to assign width to the instance variable.e) Implement a setHeight method to assign height to the instance variable.f) Implement a getWidth method to return the value of the instance variable width.g) Implement a getHeight method to return the value of the instance variable height.h) Implement an area method to return the value of area of a rectangle.i) Save Rectangle class as rectangle.py.j) Import Rectangle class from rectangle.py.k) Employs the Rectangle class methods above to set and get various measurements of a rectangle. 1) Instantiate two objects of type rectangle, one with arguments one without. r1 = Rectangle(4, 5)r2 = Rectangle() 2) Call display() to print width and…
True or False ___(16) A Java class can implements multiple interfaces. ___(17) Private variables in superclass can be referenced directly by the code in a subclass. ___(18) A subclass can extends an existing class and implements other interface(s) at the same time.
public class Father { public String name; public int age; // customer name Father(){ name=”Hassan”; age=50;} public void display(){ System.out.println(“Name:”+name); System.out.println(“Age:”+age); } } 1. Based on Figure 3, create a class named Child that inherits the Father class. Declare an instance name location (String) for class Child. 2. Define a constructor in class Child and give an appropriate initial values for the instance (name, age, location). 3. Define a method display () in class Child, execute the display ( ) method in superclass using the keyword super. Method display ( ) in class Child should print the information of name, age and location 4. Create other class named Main for the main method and create 2 objects for the 2 classes (Father and Child). Then execute the display ( ) method for Father and Child. Example of the output as in Figure 4: Father's info: Name: Josh Age: 50 Child's info: Name: Christy Age: 20 Location:…
What is the concept of binding? Differentiate between early binding and late binding. (Write in maximum 5 lines) Write a Java operator/keyword, which can be used to check the validity of reference before attempting down-casting from superclass object to subclass reference. Given an example of it usage. (Write in maximum 5 lines)