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

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Classes: Write a Person class that has these attributes: person_ID, first and last names, and age Default and overloaded constructors Accessors and mutators equals method toString method (make this virtual if C++, don't forget to prep the class for polymorphism) Inheritance: Create a child class to Person called Student: Attributes: GPA and status (freshman, sophomore, junior, senior, graduate, graduated). Make sure you have appropriate accessor/mutator methods Create another child class to represent Faculty. This class will have faculty rank and length of service as attributes along with an office location. Again, add methods as needed. Application Create an application that displays a menu that allows users to add students or faculty, or print either one or exit. Deliverable: Submit your source code and classes on Github (you will be supplied an account) You will also submit a Word document and your code on Canvas. In the document you iwll write a summary of your design…
package pkl public class Parent{ private String name; int id; public double fees private void assignName (String n) { Parent pr1=Parent(); this.name=n;} void assignld (int aid) { this.id=aid;} public void calcFees() { this.fees *=10;} }// Class package pkl public class FollowUP { public void methodUP () { Select one: Check the code above and answer the following: pr1.name="M"; is accessible a. False O b. True } }//Class package pk2 public class TrackMe { public void methodMe () { Parent pr2 Parent(); - } }// Class
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…
True or False A child class cannot override the parent’s definition of an inherited method.
1%V1 l 3G 50 Write the code in main to call function tostring(): package lab5; public class Lab5 { public static void main(String] args){ ) } class person{ private String name; public String getname(){ return name;} public void setname(String n){ name=n; } } class Employee extends person{ private int Employeeld; public int getEmployeeld(){return Employeeld;} public void setEmployeeld(int employeeld){ this.Employeeld=Employeeld; }} class faculty extends Employee{ private String rank; faculty(int Employeeld,String name,String rank) { super.setEmployeeld(Employeeld); super.setname(name); this.rank=rank; public String tosring({ return super.getname()+" "+super.getEmployeeld()+" "+this.rank; 88 التفاف النص أدوات لوحة المفاتيح
What is the output of the following code? Convert the abstract class into an interface and modify the codes in all classes that will maintain the same output. (Rewrite the code)
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?
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
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