Given the following code segment. class Bike { private int wheels; public void setWheel(int wheel) { wheels = wheel; } public class BikeApp { public static void main() Bike bike1 = new Bike(); Bike bike2 = new Bike(2).; bike1.setWheel(3); a) Write two suitable constructors for class Bike. (2 marks) b) Modify the above code necessarily. Then add code to displays on the screen the number of wheels for each object. (3 marks)

Given the following code segment. class Bike { private int wheels; public void setWheel(int wheel) { wheels = wheel; } public class BikeApp { public static void main() Bike bike1 = new Bike(); Bike bike2 = new Bike(2).; bike1.setWheel(3); a) Write two suitable constructors for class Bike. (2 marks) b) Modify the above code necessarily. Then add code to displays on the screen the number of wheels for each object. (3 marks)

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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public class LabProgram { public static void main(String args[]) { Course course = new Course(); String first; // first name String last; // last name double gpa; // grade point average first = "Henry"; last = "Cabot"; gpa = 3.5; course.addStudent(new Student(first, last, gpa)); // Add 1st student first = "Brenda"; last = "Stern"; gpa = 2.0; course.addStudent(new Student(first, last, gpa)); // Add 2nd student first = "Jane"; last = "Flynn"; gpa = 3.9; course.addStudent(new Student(first, last, gpa)); // Add 3rd student first = "Lynda"; last = "Robison"; gpa = 3.2; course.addStudent(new Student(first, last, gpa)); // Add 4th student course.printRoster(); } } // Class representing a student public class Student { private String first; // first name private String last; // last name private double gpa; // grade point average…
interface StudentsADT{void admissions();void discharge();void transfers(); }public class Course{String cname;int cno;int credits;public Course(){System.out.println("\nDEFAULT constructor called");}public Course(String c){System.out.println("\noverloaded constructor called");cname=c;}public Course(Course ch){System.out.println("\nCopy constructor called");cname=ch;}void setCourseName(String ch){cname=ch;System.out.println("\n"+cname);}void setSelectionNumber(int cno1){cno=cno1;System.out.println("\n"+cno);}void setNumberOfCredits(int cdit){credits=cdit;System.out.println("\n"+credits);}void setLink(){System.out.println("\nset link");}String getCourseName(){System.out.println("\n"+cname);}int getSelectionNumber(){System.out.println("\n"+cno);}int getNumberOfCredits(){System.out.println("\n"+credits); }void getLink(){System.out.println("\ninside get link");}} public class Students{String sname;int cno;int credits;int maxno;public Students(){System.out.println("\nDEFAULT constructor…
Question 6 Consider: class Bike { } private String color; public Bike() { } public Bike(String newColor) { color = newColor; } public Bike (Bike bike) { color = } bike.color; public String getColor() { } } return color; public void setColor(String newColor) { color = newColor; Bike bike1= new Bike(); = Bike bike2 new Bike("blue"); Bike bike3 = new Bike(bike2); bike2.setColor("green"); Bike bike4 = new Bike(bike2); Which of the following are correct? bike4.getColor() returns null bike4.getColor() return "blue" bike3.getColor() return "green" bike2.getColor() returns "blue" bike4.getColor() return "green" bike1.getColor() returns bike3.getColor() return null bike3.getColor() returns "blue" bike2.getColor() returns "green" bike1.getColor() returns null
class implementation file -- Rectangle.cpp class Rectangle { #include #include "Rectangle.h" using namespace std; private: double width; double length; public: void setWidth (double); void setLength (double) ; double getWidth() const; double getLength() const; double getArea () const; } ; // set the width of the rectangle void Rectangle::setWidth (double w) { width = w; } // set the length of the rectangle void Rectangle::setLength (double l) { length l; //get the width of the rectangle double Rectangle::getWidth() const { return width; // more member functions here
// This class discounts prices by 10% public class DebugFour4 { public static void main(String args[]) { final double DISCOUNT_RATE = 0.90; int price = 100; double price2 = 100.00; tenPercentOff(price DISCOUNT_RATE); tenPercentOff(price2 DISCOUNT_RATE); } public static void tenPercentOff(int p, final double DISCOUNT_RATE) { double newPrice = p * DISCOUNT_RATE; System.out.println("Ten percent off " + p); System.out.println(" New price is " + newPrice); } public static void tenPercentOff(double p, final double DISCOUNT_RATE) { double newPrice = p * DISCOUNT_RATE; System.out.println"Ten percent off " + p); System.out.println(" New price is " + newprice); } }
public class Author2 {3 private String name;4 private int numberOfAwards;5 private boolean guildMember;6 private String[] bestsellers;78 public String Author()9 {10 name = "Grace Random";11 numberOfAwards = 0;12 guildMember = false;13 bestsellers = {"Minority Report", "Ubik", "The Man in the HighCastle"};14 }1516 public void setName(String n)17 {18 name = n;19 }20 public String getName()21 {22 return name;23 }2425 public void winsAPulitzer()26 {27 System.out.println(name + " gave a wonderful speech!");28 }29 } 1. This class includes a constructor that begins on line 8; however, it contains an error. Describe the error. 2. Rewrite the constructor header on line 8 with the error identied in part c of this question corrected. 3. Demonstrate how you might overload the constructor for this class. Write only the header. 4. Write a line of Java code to create an instance (object) of this class. Name it someAuthor. 5. Write a line of code to demonstrate how you would use the someAuthor object…
/* (name header)*/public class BatteryTester{ public static void main(String[] args) { //=========================battery1============================ //Create a Battery object called battery1 using the default constructor System.out.println("=====Battery1====="); //Print the max capacity and the current capacity of battery1 //Check if the battery is full and print the result. You need to call the method isFull() //Drain the battery by 25.5 mAh //Print the current capacity of battery1 after draining //=========================battery2============================ //Create a Battery object called battery2 using the overloaded constructor and set the current capacity and //max capacity to 2000 mAh. System.out.println("\n=====Battery2====="); //Print the max capacity and the current capacity of battery2 //Drain the battery by 2200 mAh //Print…
class Course { private String courseNumber; private String courseName; private int creditHrs; public Course (String number, String name, int creditHrs){ this.courseNumber = number; this.courseName = name; this.creditHrs = creditHrs; } public String getNumber() { return courseNumber; } public String getName() { return courseName; } public int getCreditHrs() { return creditHrs; } public void setCourseNumber(String courseNumber) { this.courseNumber = courseNumber; } public void setCourseName(String courseName) { this.courseName = courseName; } public void setCreditHrs(int creditHrs) { this.creditHrs = creditHrs; }}class Student { private String firstName; private String lastName; private String gender; private String phoneNumber; private String email; private String jNumber; protected ArrayList courseList; public String getFullName() {…
subject :- object oriented programming python assume a typical luggage contains shirts, jackets, pants, and socks, among other items. It may also include DVDs with operating systems such as Windows 11, Ubuntu Linux, and MacOS. It can also store games and movie DVDs in addition to software DVDs. It could also include some basic hardware tools like a hammer, screwdrivers, and scissors. You'll design classes for the luggage object and the objects it holds using an object-oriented approach. Except for abstract classes, each class should include at least one attribute and one feature method (a unique function that belongs to that class, such as cut() in the Scissor class). Keep in mind that for objects with similar features and behaviors, you should attempt to design abstract classes. Define suitable class relationships like aggregation, composition, and association as well. Create a UML class diagram to represent your classes and their relationships.
class IndexItem { public: virtual int count() = 0; virtual void display()= 0; };class Book : public IndexItem { private: string title; string author; public: Book(string title, string author): title(title), author(author){} virtual int count(){ return 1; } virtual void display(){ /* YOU DO NOT NEED TO IMPLEMENT THIS FUNCTION */ } };class Category: public IndexItem { private: /* fill in the private member variables for the Category class below */ ? int count; public: Category(string name, string code): name(name), code(code){} /* Implement the count function below. Consider the use of the function as depicted in main() */ ? /* Implement the add function which fills the category with contents below. Consider the use of the function as depicted in main() */ ? virtualvoiddisplay(){ /* YOU DO NOT NEED TO IMPLEMENT THIS FUNCTION */ } };
Hands-on Activity Blood Bank (Part 1) Objective: At the end of the activity, the student should be able to: Create and overload constructors. Procedure: Develop a simple program that stores a patient's blood Create two (2) classes named BloodData (no class modifier) and RunBloodData (public). For the BloodData class: declare two (2) static String fields named bloodType for accepting (O, A, B, and AB) and rhFactor (stands for Rhesus factor, an inherited protein found on the surface of red blood cells) for accepting + and -. For the default constructor (public) of the BloodData class, set bloodType to "O" and rhFactor to '+'. Create an overloaded constructor (public) with two (2) String parameters: bt and rh. In this constructor, bloodType should store bt while rhFactor should store rh. Create a public method named display. This method will be used to display the values of bloodType and rhFactor. In the RunBloodData class, import the Scanner class for the user input. In the main…
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