Given uhe following code /A class to represent secretaries, public class Secrétary extends Employee { public void takebictation(String text)( System.out.print In("Dictating text: " text); and Secretary betty new Secretary(); System.out.print In(betty); with output Secretary@119c082 This informs us that:. O Socretary docs not inherit a constructor O Emplayee lacks a zero parameter constructor O object betty is an undefined identifier O Sccretary inherits toString from Object

Given uhe following code /A class to represent secretaries, public class Secrétary extends Employee { public void takebictation(String text)( System.out.print In("Dictating text: " text); and Secretary betty new Secretary(); System.out.print In(betty); with output Secretary@119c082 This informs us that:. O Socretary docs not inherit a constructor O Emplayee lacks a zero parameter constructor O object betty is an undefined identifier O Sccretary inherits toString from Object

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Partial Question 3 Consider: class A { } public void doA() { } class B extends A { } public void doB () { } Which of the following are allowed? B x = new B(); x.doB(); A x = new A(); x.doA(); A x = new A(); x.doB(); B x = new B(); x.doA();
Model a room class, whose member data is three integers length, width and height. The classcontains two constructors to initialize the room class objects, first is no argumentconstructor, while the second in three arguments constructor. Class also contains threemember functions i.e., getdatat) to get the data from user and store in the memory of callingobject and showdata) to show the room data of calling object, int volume(int I, int w, int h)function should receive the length, width and height values from the objects one by one andreturn the volumes of the three objects respectively.Write a main program to declare the three object rl, 12, and 13 of room class. Two objectwill store the values through three argument constructor and third object will get the datafrom user by calling getdata function. Then all three objects should call the volumefunctions to calculate their volumes and store them in three variables of type integer. Finallythe system compare the three volumes values…
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Java Program Write an abstract Java class named Vehicle. It has two attributes grade(private) and roadTax(public) with types respectively String and double types. The constructor of Vehicle class initializes grade and roadTax with 'this' reference keyword. There is one abstract method named double totalTax() . The classes that extend Vehicle are PublicVehicle and PrivateVehicle which have the following attributes. Observe that the subclasses have overridden totalTax() method. For a PublicVehicle totalTax is= 2* (fitnessTax+roadTax) and for a PrivateVehicle, totalTax is= 2.5* (fitnessTax+roadTax+10.2) class PublicVehicle extends Vehicle{private double fitnessTax;PublicVehicle(String grade, double roadTax, double fitnessTax) { //assign the variables}@Overridedouble totalTax() { //calculate total tax and return the value.}}class PrivateVehicle extends Vehicle{private double fitnessTax;PrivateVehicle(String grade, double roadTax, double fitnessTax) { //assign the…
Instructions-Java Assignment is to define a class named Address. The Address class will have three private instance variables: an int named street_number a String named street_name and a String named state. Write three constructors for the Address class: an empty constructor (no input parameters) that initializes the three instance variables with default values of your choice, a constructor that takes the street values as input but defaults the state to "Arizona", and a constructor that takes all three pieces of information as input Next create a driver class named Main.java. Put public static void main here and test out your class by creating three instances of Address, one using each of the constructors. You can choose the particular address values that are used. I recommend you make them up and do not use actual addresses. Run your code to make sure it works. Next add the following public methods to the Address class and test them from main as you go: Write getters and…
Consider the following class definition. public class ClassP private String str; public ClassP (String newStr) { String str = newStr; } The ClassP constructor is intended to initialize the str instance variable to the value of the formal parameter newStr. Which of the following statements best describes why the ClassP constructor does not work as intended? a. The constructor should have a return type of String. b. The constructor should have a return type of void. c. The instance variable str should be designated public. d. The variable str should be designated public in the constructor. e. The variable str should not be declared as a String in the constructor.
can u help me solving this one in java muliple choice questions
Define a default constructor that initializes the data members, string title and integer year, with the default values "Empty" and -1, respectively. Ex: If the input is Magnolia 1989, then the output is: Title: Empty, Year: -1 Title: Magnolia, Year: 1989 Note: The class's print function is called first after the default constructor, then again after the inputs are passed to the setters. 5 class Book { 6 public: 7 8 9 10 11 12 13 14 15 }; 16 Book(); void SetTitle(string bookTitle); void Set Year (int bookYear); void Print (); private: string title; int year; 17 Your code goes here */ 18 19 void Book::SetTitle(string hook Title) { CS Scarint (19 bi Title mscanner 22 23 void Book Set Year(int bookYear) [ 2
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