Override the Person class’s speak function inside the Student class. Make the function print “I’m a student”. public class Person { public void speak() { System.out.println("I'm a person"); } public static void main(String[] args) { Person p1 = new Student(); p1.speak(); } } class Student extends Person { // ADD CODE HERE }

Override the Person class’s speak function inside the Student class. Make the function print “I’m a student”. public class Person { public void speak() { System.out.println("I'm a person"); } public static void main(String[] args) { Person p1 = new Student(); p1.speak(); } } class Student extends Person { // ADD CODE HERE }

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

See similar textbooks

Similar questions

6. class PPP int H: protected : int S; public : void input (int); void out (); }; class Q0Q : private PPP int T; protected : int U; public : void indata (int, int); void outdata (); }; class RRR : public Q0Q int M; public : void disp (); }; int main () 002 objl; RRR obj2; return 0; a. In the above code, is the member function out() accessible by obj1? b. Name the member function(s), which can be accessed from the obj2? c. Name the data member(s) that can be accessed from function disp().
class smart { public: void print() const; void set(int, int); int sum(); smart(); smart(int, int); private: int x; int y; int secret(); }; class superSmart: public smart { public: void print() const; void set(int, int, int); int manipulate(); superSmart(); superSmart(int, int, int); private: int z; }; Now answer the following questions: a. Which private members, if any, of smart are public members of superSmart? b. Which members, functions, and/or data of the class smart are directly accessible in class superSmart?
public class Car { private int modelYear; // TODO: Declare purchasePrice field (int) private int currentValue; public void setModelYear(int userYear){ modelYear = userYear; } public int getModelYear() { return modelYear; } // TODO: Define setPurchasePrice() method // TODO: Define getPurchasePrice() method public void calcCurrentValue(int currentYear) { double depreciationRate = 0.15; int carAge = currentYear - modelYear; // Car depreciation formula currentValue = (int) Math.round(purchasePrice * Math.pow((1 - depreciationRate), carAge)); } // TODO: Define printInfo() method to output modelYear, purchasePrice, and currentValue } import java.util.Scanner;import java.lang.Math; public class CarValue { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); Car myCar = new Car(); int userYear = scnr.nextInt(); int userPrice = scnr.nextInt(); int…
public class Cat extends Pet { private String breed; public void setBreed(String userBreed) { breed = userBreed; } public String getBreed() { return breed; }} public class Pet { protected String name; protected int age; public void setName(String userName) { name = userName; } public String getName() { return name; } public void setAge(int userAge) { age = userAge; } public int getAge() { return age; } public void printInfo() { System.out.println("Pet Information: "); System.out.println(" Name: " + name); System.out.println(" Age: " + age); } } import java.util.Scanner; public class PetInformation { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); // create a generic Pet and a Cat Pet myPet = new Pet(); Cat myCat = new Cat(); // declare variables for pet and cat info String petName, catName, catBreed; int petAge,…
Code the StudentAccount class according to the class diagramMethods explanation:pay(double): doubleThis method is called when a student pays an amount towards outstanding fees. The balance isreduced by the amount received. The updated balance is returned by the method.addFees(double): doubleThis method is called to increase the balance by the amount received as a parameter. The updatedbalance is returned by the method.refund(): voidThis method is called when any monies owned to the student is paid out. This method can onlyrefund a student if the balance is negative. It displays the amount to be refunded and set thebalance to zero. (Use Math.abs(double) in your output message). If there is no refund, display anappropriate message.Test your StudentAccount class by creating objects and calling the methods addFees(), pay() andrefund(). Use toString() to display the object’s data after each method called
Computer Science hand.javapackage poker; import com.google.gson.Gson;import com.google.gson.GsonBuilder;import poker.Card; public class Hand{//private transient int i=10;// marked transient they will not serialized / deserialized public Card[] cards; public Hand(){} public boolean is_better_than(Hand H){return false;} public boolean is_equal(Hand H){return false;}} card.javapackage poker; public class Card{public enum Suite{HEARTS,CLUBS,DIAMONDS,SPADES} public enum Value{ACE,TWO,THREE,FOUR,FIVE,SIX,SEVEN,EIGHT,NINE,TEN,JACK,QUEEN,KING} public Suite suite;public Value value; public Card(){ }} // main.java import com.google.gson.Gson;import com.google.gson.GsonBuilder;import poker.Hand;import poker.Card; public class Main{ public static void main(String[] args){// this function is provided as a convenient way to// run the code from the command line.//// it will not be graded, but it needs to compile and// execute without a failure. System.out.println("Start"); // Demonstrate…
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() {…
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 */ } };
True or False A class can implement more than one interface.
public class Person { private String personID; private String firstName; private String lastName; private String birthDate; private String address; public Person(){ personID = ""; firstName = ""; lastName = ""; birthDate = ""; address = ""; } public Person(String id, String first, String last, String birth, String add){ setPerson(id,first,last,birth,add); } public void setPerson(String id, String first, String last, String birth, String add){ personID = id; firstName = first; lastName = last; birthDate = birth; address = add; } public String getFirstName(){ return firstName; } public String getLastName(){ return lastName; } public String getBirthdate(){ return birthDate; } public String getAddress(){ return address; } public void print(){ System.out.print("\nPerson ID = " + personID); System.out.print("\nFirst Name = " +firstName); System.out.print("\nLast Name = " +lastName); System.out.print("\nBirth Date = " +birthDate); System.out.print("\nAddress = " +address); } public String…
public class Cylinder { public void smoothen() { } } } public abstract class Vessel implements Steerable { private Engine e; } System.out.println("Smoothening.."); public Engine getEngine() { return e; } public void setEngine (Engine e) { this.e = e; } public abstract void turnOn(); public class Engine { private Cylinder [] y; private int cyls = 1; static final int maxCylinders = 12; public void addCylinder (Cylinder y) { if (cyls