programming 5A1. Find the output of the following code in order.public class Faculty extends Employee {public static void main (String[] args) {new Faculty () ;System.out.println ("Good Luck ");}public Faculty () {System.out.println (" Faculty's no-arg constructor is invoked");}class Employee extends Person {public Employee () {System.out.println (" Employee's no-arg constructor is invoked");}class Person {public Person () {this ("Invoke Person's overloaded constructor");System.out.println ("Person's no-arg constructor is invoked");}public Person (String s) {System.out.println (s);

Here, the concept of constructor chaining is used. Constructing an instance of a class invokes or…

Answered: A1. Find the output of the following…

Engineering

Computer Science

A1. Find the output of the following code in order.

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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A1. Find the output of the following code in order. public class Faculty extends Employee { - public static void main(String) args) { new Faculty () ; System.out.println("Good Luck"); public Faculty () { System.out.println(" Faculty's no-arg constructor is invoked"); class Employee extends Person { public Employee () { System.out.println (" Employee's no-arg constructor is invoked"); class Person { public Person () { this ("Invoke Person's overloaded constructor"); System.out.println("Person's no-arg constructor is invoked"); public Person (String s) { System.out.println (s);
5) Consider the following code. public class Test { public static void main(String[] args){ NClass nc = new NClass(); nc.t += 1; } } class NClass { public imt t; private NClass() {//Constructor www. } } a) The program has a compilation error because the NClass class has a private constructor which is not accessible within the Test class. b) The program does not compile because the parameter list of the main method is wrong. c) The program compiles, but has a run time error because t has no initial value. d) The program compiles and runs fine.
Q 1: Access class members from the same package Note: ClassA and ClassB in this question are in the same package. public class ClassB { public int x = 1; int y = 2; private int z =3; } public class ClassA { public static void main(String[] args) { ClassB cb = new ClassB(); // System.out.print(cb.x); /* 1 */ // System.out.print(cb.y); /* 2 */ // System.out.print(cb.z); /* 3 */ } } 1.1- Which statement(s) are true? Choose all that apply. a. If statement 1 is uncommented, the code prints "1" to the output. b. If statement 2 is uncommented, the code prints "2" to the output. c. If statement 3 is uncommented, the code prints "3" to the output. .d. This code does not compile 1.2- Try to do the following: • Declare a character type variable myChar in the class ClassB, the variable myChar shouldn't be accessible through the object cb. Add a statement to the classA to test whether myChar is accessible.
Complete the program and Write the output of the given code fragment: public class parent { public void someFunction() { System.out.println ("Parent Function"); } } public class child extends parent { public void someFunction() { System.out.println ("Child Function"); } public static void main(String args[]) { //insert appropriate codes to declare objects for the parent and child classes. child c1 = new child(); //insert code to call the parent method someFuntion () p2.someFunction(); c1.someFunction(); } }
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
2- Consider the following program:public class Product{ private int price;public void setPrice(int theprice){price = thePrice;}}public class SpecialProduct extends Item{ private int discount;public void setDiscount(int theDiscount){discount = theDiscount;}}public class Main{public static void main(String[]args){SpecialProduct product = new SpecialProduct();}}Which of the following compiles without a problem? Why?a. product.discount = 20;b. product.setDiscount(20);c. product.setPrice(50);
QI: (a) Find the errors in the following also explain what causes the error class Student int getid() private: int *id; int semester; string name; double cgpa; static int totalStudent; return *id; double getCgpa() return cgpas public: static int getSemester() Student () { id = new int(); name = ""; cgpa = e; totalStudent++ return semester; void setCgpa(int c) const cgpa = c; void setSection(char sec) Student (int *i,int s,string n, double c) id = i; section = sec; static int getTotalStudent() semester = s; name = ""; cgpa = e; totalstudent++; totalStudent =5; return totalStudent;
Nutritional information (classes/constructors) PYTHON ONLY Complete the FoodItem class by adding a constructor to initialize a food item. The constructor should initialize the name (a string) to "None" and all other instance attributes to 0.0 by default. If the constructor is called with a food name, grams of fat, grams of carbohydrates, and grams of protein, the constructor should assign each instance attribute with the appropriate parameter value. The given program accepts as input a food item name, fat, carbs, and protein and the number of servings. The program creates a food item using the constructor parameters' default values and a food item using the input values. The program outputs the nutritional information and calories per serving for both food items. Ex: If the input is: M&M's10.034.02.01.0 where M&M's is the food name, 10.0 is the grams of fat, 34.0 is the grams of carbohydrates, 2.0 is the grams of protein, and 1.0 is the number of servings, the output is:…
For the following four classes, choose the correct relationship between each pair. public class Room ( private String m type; private double m area; // "Bedroom", "Dining room", etc. // in square feet public Room (String type, double area) m type type; m area = area; public class Person { private String m name; private int m age; public Person (String name, int age) m name = name; m age = age; public class LivingSSpace ( private String m address; private Room[] m rooms; private Person[] m occupants; private int m countRooms; private int m countoccupants; public LivingSpace (String address, int numRooms, int numoccupants) m address = address; new int [numRooms]; = new int [numOceupants]; m rooms %3D D occupants m countRooms = m countOccupants = 0; public void addRoom (String type, double area)
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…
Take a look at the class declaration below: package p1; class Test8{ package p2; import p1.Test8; package p3; import p1.Test8; import p2.Test9; int i; class Test9 extends Test8 { private int j; protected int k; public int I; } class TestDemo3{ public static void main(String args[]){ Test8 t8 = new Test8(); Test9 t9 = new Test9(); } Out of these 4 variables declared in Test8, which are accessible in Test9 directly and by creating Test8 reference? In TestDemo3 main function, which variables can be used by each of the references t8 and t9?
2. Consider the following class definitions: public class BClass } private int x; public void set(int a) } X a; { public void print() } System.out.print(x); { { public class DClass extends BClass } private int y; public void set(int a, int b) } //Postcondition: x =a; y=Db; { public void print( ) {.…} a. Write the definition of the print method of DClass that overrides it. b. Write the definition of the method set of the class DClass.