Consider: class Bike { } private String make; public Bike() { // ... } public Bike(String newMake) // ... } public public Bike (Bike bike) //... } Bike(Bike bike) is the no-arg constructor Bike() is the no-arg constructor Bike(String newMake) is the no-arg constructor This is not valid class declaration

Consider: class Bike { } private String make; public Bike() { // ... } public Bike(String newMake) // ... } public public Bike (Bike bike) //... } Bike(Bike bike) is the no-arg constructor Bike() is the no-arg constructor Bike(String newMake) is the no-arg constructor This is not valid class declaration

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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Similar questions

There is a class hierarchy that includes three classes: class Animal { protected int age; public int getAge() { return age; } public void setAge(int age) { this.age = age; }}class Pet extends Animal { protected String name; public String getName() { return name; } public void setName(String name) { this.name = name; }}class Cat extends Pet { protected String color; public String getColor() { return color; } public void setColor(String color) { this.color = color; }} Given the following object: Pet cat = new Cat(); Select all invalid method invocations.
public class ItemToPurchase { private String itemName; private int itemPrice; private int itemQuantity; // Default constructor public ItemToPurchase() { itemName = "none"; itemPrice = 0; itemQuantity = 0; } // Mutator for itemName public void setName(String itemName) { this.itemName = itemName; } // Accessor for itemName public String getName() { return itemName; } // Mutator for itemPrice public void setPrice(int itemPrice) { this.itemPrice = itemPrice; } // Accessor for itemPrice public int getPrice() { return itemPrice; } // Mutator for itemQuantity public void setQuantity(int itemQuantity) { this.itemQuantity = itemQuantity; } // Accessor for itemQuantity public int getQuantity() { return itemQuantity; }} import java.util.Scanner; public class ShoppingCartPrinter { public static void main(String[] args) { Scanner scnr = new…
Given the following class definition: class employee{public: employee(); employee(string, int, double); employee(int, double); employee(string); void setData(string, int, double); void print() const; void updatePay(double); int getNumOfServiceYears() const; double getPay() const;private: string name; int numOfServiceYears; double pay;}; Create a class parttime derived from the above class that includes private members payRate and hoursWorked of type double along with a constructor and the definition of a print function that prints out all information from the base and derived class. Provide a test program that would demonstrate the working parttime class. Note: You can assume all code is stored in a single file.
Conver the class To UML diagram class Clint {        private String accNumber; private String holderName; private long currBalance; public Clint() { currBalance = 0; } public Clint(String acc, String name, long bal) { accNumber = acc; holderName = name; currBalance = bal; } Scanner sc = new Scanner(System.in); // deposit money into the bank account by given amount amt public void deposit(long amt) { currBalance += amt; } // if amount is not given ask the user for the amount public void deposit() { System.out.print("Enter Amount(to deposit): $"); long amt = sc.nextLong(); currBalance += amt; } // withdraw money from the bank account public void withdraw(long amt) { if (currBalance >= amt) { currBalance -= amt; } else { System.out.println("Insufficient funds!"); } } // if amt is not given ask the user for the amount public…
public class Artwork { // TODO: Declare private fields - title, yearCreated    // TODO: Declare private field artist of type Artist // TODO: Define default constructor    // TODO: Define get methods: getTitle(), getYearCreated() // TODO: Define second constructor to initialize   // private fields (title, yearCreated, artist) // TODO: Define printInfo() method // Call the printInfo() method in Artist.java to print an artist's information }} public class ArtworkLabel { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); String userTitle, userArtistName; int yearCreated, userBirthYear, userDeathYear; userArtistName = scnr.nextLine(); userBirthYear = scnr.nextInt(); scnr.nextLine(); userDeathYear = scnr.nextInt(); scnr.nextLine(); userTitle = scnr.nextLine(); yearCreated =…
1. An abstract class called Pet is defined below: public abstract class Pet{ private String id;private String name; private static int count = 0; public Pet(String name)  {  count++; id = "P" + count; this.name = name; }  public String toString()  {  return "ID: " + id + ", Name: " + name; } abstract public void sound();} The Cat class is a subclass of the Pet class. The class specifications are given below:• It has a private field named age to record the cat’s age.• The class constructor sets both name and age fields of the cat with the given parameter values. The field age is set to 0 if the given value is negative. • It provides an accessor method for the field age. • It overwrites the toString method to return a string consisting of the cat’s ID, nameand age. e.g.ID: P15, Name: Molly, Age: 4• It prints out "Miaow" in a terminal when the method sound is called. Define the Cat class in full.
Design a class that implements the basic properties of a die. Consider the definition of the following class die.(Beginner) class die { public: die(); //Default constructor //Sets the default number rolled by a die to 1 void roll(); //Function to roll a die. //This function uses a random number generator to randomly //generate a number between 1 and 6, and stores the number //in the instance variable num. int getNum() const; //Function to return the number on the top face of the die. //Returns the value of the instance variable num. private: int num; }; a) Write the definitions of the functions to implement the operations for the class die. b) Write a program that uses the class die to roll 10 dice. (Use an array of size 10 to implement 10 dice.) The program prompts the user to enter the desired sum and the number of times the dice are to be rolled. The program outputs the number of times the desired sum was rolled. Test run your program to roll the 10 dice 10000 times with the desired…
/** NoParking models a No Parking sign */ public class NoParking { //-----------Start below here. To do: approximate lines of code = 15 // 1. Write the class so that it works as expected with the unit tester. private String startTime; private String endTime; /** Constructs a NoParking object with a default time */ public NoParking(){ startTime = "0:00"; endTime = "23:59"; } /** Sets the start time @param the start time */ public void setStartTime(String start){ startTime = start; } /** Sets the end time @param the end time */ public void setEndTime(String end){ endTime = end; } /** Reverses the times */ /** Returns the string for no parking @return the string for no parking */ } //-----------------End here. Please do not remove this…
2. Add a constructor for Animal class shown. The constructor should pass in a string parameter named "sound". 1 using System; 2 3 public class Animal 4 { 5 public string Sound { get; set; } public void Speak() { Console.Writeline("The dog says " + Sound); } 10 11 } 12 13 public class Program 14 { public static void Main() { 15 16 17 18 } 19 } A 00
Subclass toString should call include super.toString(); re-submit these codes. public class Vehicle { private String registrationNumber; private String ownerName; private double price; private int yearManufactured; Vehicle [] myVehicles = new Vehicle[100]; public Vehicle() { registrationNumber=""; ownerName=""; price=0.0; yearManufactured=0; } public Vehicle(String registrationNumber, String ownerName, double price, int yearManufactured) { this.registrationNumber=registrationNumber; this.ownerName=ownerName; this.price=price; this.yearManufactured=yearManufactured; } public String getRegistrationNumber() { return registrationNumber; } public String getOwnerName() { return ownerName; } public double getPrice() { return price; } public int getYearManufactured() { return yearManufactured; }…
class A {protected int x1,y1,z; public: A(a, b,c):x1(a+2),y1(b-1),z(c+2) { for(i=0; i<5;i++) x1++;y1++;z++;}}; class B {protected: int x,y; public: B(a,b):x(a+1),y(b+2) { for(i=0; i<5;i++) x+=2; y+=1;}}; class D:public B, virtual public A { private: int a,b; public: D(k,m,n): a(k+n), B(k,m),b(n+2),A(k,m,n) { a=a+1;b=b+1;}}; int main() (Dob(4,2,5);} what the values of x1,y1 and z
Following is the class of Person: public class Person { private String Name; public int age; public void set(String Name, int age) { this.Name = Name; if(age > 0 && age <= 100) this.age = age; else this.age = 1; } public void display() { System.out.println("Name: " + this.Name +" ,Age: " + this.age); } public static void main(String[] args) { PersonManagement personManagement = new PersonManagement(); Person p1 = new Person(), p2 = new Person(), p3 = new Person(), p4 = new Person(), p5 = new Person(); p1.set("Asad", 103); p2.set("Ali", 17); p3.set("Usman", 16); p4.set("Raees", 18); p5.set("Mujeeb", 15); Person[] persons = new Person[]{p1,p2,p3,p4,p5};…