public interface Joy ( public void happySign(); } public class Man implements Joy { public Man () { } public void happySign () { System.out.println("smiles"); } public void sadSign () { } System.out.println("frowns"); public class Dog implements Joy ( public Dog () {} public void happySign () { } a) Joy obj1 = new Man(); obj1.sadSign(); System.out.println("wags tail"); public class GuardDog extends Dog { public GuardDog () { } public void happySign () { System.out.println("barks"); } public void angrySign () { } System.out.println("growls"); If the following lines of code appeared in the main method of a driver program, would the program compile and run? (yes or no?) If no, write 1-2 sentences to explain why not. If yes, indicate what the output would be.

public interface Joy ( public void happySign(); } public class Man implements Joy { public Man () { } public void happySign () { System.out.println("smiles"); } public void sadSign () { } System.out.println("frowns"); public class Dog implements Joy ( public Dog () {} public void happySign () { } a) Joy obj1 = new Man(); obj1.sadSign(); System.out.println("wags tail"); public class GuardDog extends Dog { public GuardDog () { } public void happySign () { System.out.println("barks"); } public void angrySign () { } System.out.println("growls"); If the following lines of code appeared in the main method of a driver program, would the program compile and run? (yes or no?) If no, write 1-2 sentences to explain why not. If yes, indicate what the output would be.

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

UML DIAGRAM FOR THE FOLLOWING public class BookStore { /** * @param args the command line arguments */ Customer customerList[]; Product productList[]; public static void main(String[] args) { // TODO code application logic here } public Customer registerPremiumMember(){ Customer newCustomer = new Customer(); return newCustomer; } public void completePurchase(Customer coCustomer){ } public Customer addToBasket(Customer currentCustomer, Product cuProduct){ currentCustomer.addToBasket(cuProduct); return currentCustomer; }}
Interface This lab is a small demonstration of how interfaces work. Type up the code and submit the results. CODE public class InterfaceExample { public static void main(String[] args) { DemoClass myObj = new DemoClass(); myObj.myMethod(); myObj.myOtherMethod(); } public interface InterfaceOne { public void myMethod(); // interface method } public interface Interface Two { public void myOtherMethod(); // interface method } public class DemoClass implements InterfaceOne, Interface Two { public void myMethod() { System.out.println("Some text.."); } public void myOtherMethod() { System.out.println("Some other text..."); }
defined the cat class in full
Complete the following class diagram with the correct associations to make our object-oriented parking system complete.
public class OfferedCourse extends Course { // TODO: Declare private fields // TODO: Define mutator methods - // setInstructorName(), setLocation(), setClassTime() // TODO: Define accessor methods - // getInstructorName(), getLocation(), getClassTime() } import java.util.Scanner; public class CourseInformation { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); Course myCourse = new Course(); OfferedCourse myOfferedCourse = new OfferedCourse(); String courseNumber, courseTitle; String oCourseNumber, oCourseTitle, instructorName, location, classTime; courseNumber = scnr.nextLine(); courseTitle = scnr.nextLine(); oCourseNumber = scnr.nextLine(); oCourseTitle = scnr.nextLine(); instructorName = scnr.nextLine(); location = scnr.nextLine(); classTime = scnr.nextLine(); myCourse.setCourseNumber(courseNumber); myCourse.setCourseTitle(courseTitle);…
Run this JAVA code in netbeans and take screenshots as proof of its implementation: / Java Program to demonstrate the// working of Abstract Factory Pattern enum CarType{ MICRO, MINI, LUXURY} abstract class Car{ Car(CarType model, Location location) { this.model = model; this.location = location; } abstract void construct(); CarType model = null; Location location = null; CarType getModel() { return model; } void setModel(CarType model) { this.model = model; } Location getLocation() { return location; } void setLocation(Location location) { this.location = location; } @Override public String toString() { return "CarModel - "+model + " located in "+location; }} class LuxuryCar extends Car{ LuxuryCar(Location location) { super(CarType.LUXURY, location); construct(); } @Override protected void construct() { System.out.println("Connecting to luxury car"); }} class…
Consider the following interface and class definitions: public interface A { public void m1(); public void m2(); } public interface B { public void m3(); } public interface C extends B { public void m1(); public void m2(); public void m4(); } public class X implements B { public void m3() { System.out.println("X m3"); } public void m1() { System.out.println("X m1"); } } public class Y implements A, B { public void m1() { System.out.println("Y m1"); } public void m2() { System.out.println("Y m2"); } public void m3() { System.out.println("Y m3"); } public void m4() { System.out.println(Y m4"); } } public class Z implements C { public void m1() { System.out.println("Z m1"); } public void m2() { System.out.println("Z m2"); } public void m3() { System.out.println("Z m3"); } public void m4() { System.out.println("Z m4"); } } Assume the following variables are created. X x = new X(); Y y = new Y(); Z z = new Z(); A a = new Y(); B b = new X(); B b2 = new Y(); C c = new Z(); Write…
The class Thingy is defined as shown below. public class Thingy {private int stat; public Thingy(int s) {stat = s;}public int getStat() {return stat;}public void setStat(int s) {stat = s;}} The code below appears in the main method of another class. What is printed when it is run? Thingy t = new Thingy(13);t.setStat(7);System.out.println(t.getStat());
PLEASE ANSWER ALL QUESTIONS ON THE NEXT PAGE: class bookType { public: void setBookTitle(string s); //sets the bookTitle to s void setBookISBN(string ISBN); //sets the private member bookISBN to the parameter void setBookPrice(double cost); //sets the private member bookPrice to cost void setCopiesInStock(int noOfCopies); //sets the private member copiesInStock to noOfCopies void printInfo() const; //prints the bookTitle, bookISBN, the bookPrice and the copiesInStock string getBookISBN() const; //returns the bookISBN double getBookPrice() const; //returns the bookPrice int showQuantityInStock() const; //returns the quantity in stock void updateQuantity(int addBooks); //adds addBooks to the quantityInStock, so that the quantity in stock now has it original // value plus the parameter sent to this function private: string…
Define an Animal method that updates the time to complete a particular behavior based on its name. Choose one of the following from the above choices (A, B, C or D within the code): public class Animal { // Other instance variables, constructors and methods // omitted for brevity // A public void updateTimeTakenForBehavior(String behaviorName, int timeToComplete) { for(int i = 0; i < this.behaviorList.length; i++) { Behavior tempBehavior = this.behaviorList[i]; if( tempBehavior.getBehaviorName().equals(behaviorName)) { tempBehavior.setTimeToComplete(timeToComplete); } } } // B public void updateTimeTakenForBehavior(String behaviorName, int timeToComplete) { for(int i = 0; i < this.behaviorList.length; i++) { Behavior tempBehavior = this.behaviorList[i]; if( !tempBehavior.getBehaviorName().equals(behaviorName) ) {…