Is this TRUE or FALSE?IF FALSE WHAT IS THE CORRECT ANSWER? Finish the constructor for the KickBall class.public class Ball {public double diameter;public Ball(double diam) {diameter = diam;}}public class KickBall extends Ball{private Color balliColor;public KickBall(double diam, Color ballColor) {super.diameter = diam;this.ballColor = ballColor;}

Answered: Is this TRUE or FALSE? IF FALSE WHAT…

Engineering

Computer Science

Is this TRUE or FALSE? IF FALSE WHAT IS THE CORRECT ANSWER

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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public abstract class Shape { public Shape() { } public abstract double area() ; public String who() { return "Shape" ; } } public class Circle extends Shape { private int radius ; public Circle( int r ) { radius = r ; } @Override public double area() { return Math.PI * radius * radius ; } } public class Square extends Shape { private int _sideLength ; public Square( int sideLength ) { /* TODO question 45 */ } @Override public double area() { return _sideLength * _sideLength ; } } Implement the Square constructor, and make sure it throws an exception when the input parameter is not a valid length. The input parameter must be positive to be considered valid.
Create a subclass named Square from the superclass Geometricobject. Create an instance variable named width with initial value 0. Create a no-arg constructor. Create the another constructor, which has one parameter named wid. ASsign the wid to the instance variable named width. Create the getWidth() method, the setWidth() method. Override the getArea() method. Override the getPerimeter() method. Create a test class named Test to create an instance with wid= 6 from Square class. Call the getArea() and getPermeter() methods to print out the area and perimeter of the square with width=6.
Incorrect Question 6 public class Shape { Color fillColor; } public Shape() { fill Color = Color. RED; } } public Shape(Color fillColor) { this.fill Color = fillColor; } public class Circle extends Shape { int radius; public Circle() { radius = 1; } public Circle(int radius) { this.radius = radius; } public Circle(int radius, Color fillColor) { } super(fillColor); this.radius = radius; Circle c1= new Circle(); Circle c2= new Circle(5); Circle c3 = new Circle(10, Color.BLUE); Which of the following are correct? c2 has radius 5 c1 is red c2 is red c3 has radius 10 c3 has radius 1 c3 is red c1 is blue ✔c2 has radius 10 c3 is blue c1 has radius 5 c1 has radius 1 c2 has radius 1 c2 is blue
8. OOPS Theory #6 public class Car { public void horn() { System.out.println("Horn horn"); } } public class Ferrari extends Car { public void horn() { System.out.println("Ferarriiiiii"); } } public static void main(String[] args) { Ferrari ferrari = new Car(); ferrari.horn(); } Pick ONE option Horn horn Ferarriiii Cannot compile Runtime exception Clear Selection 9. OOPS Theory #7 In Java, we can achieve the abstraction by creating the blueprint of an object and only have abstract methods. What do we call this? Pick ONE option Interface Encapsulation Instance Protected Clear Selection
package debugging; public class BeanCounter {public static int beanCount = 0;} public class Bean {public Color beanColor;public String description;public Bean(Color beanColor, String description){this.beanColor = beanColor;this.description = description;}} public class Color {double[] rgb;double saturation;public Color(double[] rgb, double saturation){this.rgb = rgb;this.saturation = 0.0;}} public class Debugging { /*** @param args the command line arguments*/public static void main(String[] args) {BeanCounter bc = new BeanCounter();double[] redGreenBlue = {22.3d, 41.7d, 202.57d};Color c = new Color(rgb, 22.44+0.05, 15.78, 79.53, 252.04);++BeanCounter.beanCount;Bean b = new FavaBean(c); // New bean created!bc.beanCount++;}} 1. Remove the errors, warnings and mistakes that are in the source code. 2. Modify the code so that: •one bean is created •one bean is counted •there is only one line in the main method
49. Consider the following class definition. public class Cylinder } private double baseRadius; private double height; public Cylinder () baseRadius = 0; height = 0; public Cylinder (double 1, double h) } baseRadius - 1; height = h; { public void set (double r, double h) } baseRadius = r; height = h; { public String toString () } return (baseRadius + It n + height); { public double SurfaceArea () return 2 * 3.14 * baseRadius height; public double volume () } return 3.14 baseRadius * baseRadius * height; { Which of the following statements correctly instantiates the Cylinder object myCylinder? (i) Cylinder mycylinder = new Cylinder (2.5, 7.3) : (ii) class Cylinder myCylinder = new Cylinder (2.5, 7.3); (ii) myCylinder new Cylinder (2.5, 7.3); %3D a. Only (i) b. Only (i) c. Only (iüi) d. Both (ii) and (ii)
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
public class StairViewer public static void main(String(] args) // Step 2: Create a rectangle and draw it as the // top step of the stair // location: (20, 10) // size: (20, 20) 18 // Step 3: Create a rectangle and draw it as the 19 // middle step of the stair 20 // location: below the top step, aligned on left // size: (40, 20) 21 22 23 24 // Step 4: Create a rectangle and draw it as the 25 // bottom step of the stair 26 // location: below the middle step, aligned on left // size: (60, 20) 27 28 29 30 } 31 32
Public classTestMain { public static void main(String [ ] args) { Car myCar1, myCar2; Electric Car myElec1, myElec2; myCar1 = new Car( ); myCar2 = new Car("Ford", 1200, "Green"); myElec1 = new ElectricCar( ); myElec2 = new ElectricCar(15); } }
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,…
Find the error(s) in the following class definition: public class Circle private double radius; public double setRadius(double a) { radius = a; public void getRadius() { return radius;
public class Player { private int jerseyNumber; private int rating; public Player(int jerseyNumber, int rating) { this.jerseyNumber = jerseyNumber; this.rating = rating; } public int getJerseyNumber() { return jerseyNumber; } public void setJerseyNumber(int jerseyNumber) { this.jerseyNumber = jerseyNumber; } public int getRating() { return rating; } public void setRating(int rating) { this.rating = rating; } @Override public String toString() { return "Jersey number: " + jerseyNumber + ", Rating: " + rating; }}public class RosterManager { private ArrayList<Player> roster; public RosterManager() { roster = new ArrayList<>(); } public void addPlayer(Player player) { roster.add(player); } public void updatePlayerRating(int jerseyNumber, int newRating) { for (Player player : roster) { if (player.getJerseyNumber() ==…