What is printed by the code below? Note: There are two separate classes here. public class SampleClass { public void resetVar (int intVar) intVar 0; public class TestSampleClass public static void main (String[] args) int counter = 10; SampleClass myTestClass = new SampleClass(): myTestClass.resetVar (counter): System.out.printin (counter); It doesn't print anything.

What is printed by the code below? Note: There are two separate classes here. public class SampleClass { public void resetVar (int intVar) intVar 0; public class TestSampleClass public static void main (String[] args) int counter = 10; SampleClass myTestClass = new SampleClass(): myTestClass.resetVar (counter): System.out.printin (counter); It doesn't print anything.

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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In this second exercise, we are going to look at the impact of overriding the equals and toString methods. Start by copying over your TestEquals class from the previous exercise. You will not need to make any changes to this code.(Already have copied over) Instead, you are going to add the following methods to your Ball class: public String toString() public boolean equals(Ball other) ===================================== public class TestEquals{public static void main(String[] args){System.out.println("** Object **");Object obj1 = new Object();Object obj2 = new Object();Object obj3 = obj1;// Print out all three objectsSystem.out.println(obj1);System.out.println(obj2);System.out.println(obj3);// Print a true statement using 2 objects and ==System.out.println(obj1==obj3);// Print a false statement using 2 objects and ==System.out.println(obj1==obj2);// Print a true statement using 2 objects and .equals()System.out.println(obj1.equals(obj3));// Print a false statement using 2 objects and…
use the method setData(String,String,doule,int) to set the employee’s details; and the method getDetails() that will return a descriptive statement about the employee. import java.util.*;class Department { private int groupScore; private double groupAverage; private static int overallScore; private static double overallAverage; public Department(int r1,int r2,int r3,int r4,int r5) { Department.overallScore=Department.overallScore+r1+r2+r3+r4+r5; Department.overallAverage=Department.overallScore/10.0; this.groupScore=r1+r2+r3+r4+r5; this.groupAverage=this.groupScore/5.0; } public double getGroupAvergae() { return this.groupAverage; } public void displayAverage() { System.out.println("Overall Average:"+Department.overallAverage); } }public class Main { public static void main(String args[]) { Department d1=new Department(1,2,3,4,5); d1.displayAverage(); Department d2=new Department(5,4,4,4,1);…
I have no idea what to do. Modify the FitnessTracker class, created in Chapter 4 Programming Exercise 3AB, so that the default constructor calls the three-parameter constructor. Use TestFitnessTracker2 to test the new version of the class. import java.time.*;public class FitnessTracker2 {String activity;int minutes;LocalDate date;public FitnessTracker2() {}public FitnessTracker2(String activityParam, int minutesParam, LocalDate dateParam) {}public String getActivity() {}public int getMinutes() {}public LocalDate getDate() {}} import java.time.*;public class TestFitnessTracker2{public static void main(String[] args){ FitnessTracker2 exercise = new FitnessTracker2(); System.out.println(exercise.getActivity() + " " + exercise.getMinutes() +" minutes on " + exercise.getDate()); // code to test constructor added for exercise 3bLocalDate date = LocalDate.of(2020, 8, 20);FitnessTracker2 exercise2 = new FitnessTracker2("bicycling", 35, date); System.out.println(exercise2.getActivity() + " " +…
Redefine the equals method of the class Date (Display 4.13) so that it hasa parameter of type Object and follows the other guidelines we gave for anequals method. (Remember, you should use getClass(), not instanceof.)
In this exercise, you are going to build on your Circleclass from the previous exercise. You are going to add 2 method, areaDifference and perimeterDifference. Both methods take a doubleradius of a second circle and return the difference from the current circle. For example, if you create a Circle object with a radius of 4 and call areaDifference(3), you will return the diffence between the area of a circle with radius 4 and the area of a circle with a radius of 3. perimeterDifferencewould be the same. Make sure you create at least one Circle and test and print the results of your methods. in java
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Implement the design of the ECustomer class so that the following output is produced:[Your code should work for any number of products added in the setProductDetails method]# Write your codes here.print("Total E-Customer:", ECustomer.count)c1 = ECustomer("James")c1.setProductDetails("TV",35000,"Air Cooler", 9000)c2 = ECustomer("Mike")c2.setProductDetails("Mobile",20000,"Headphone",1200,"Fridge", 45000)c3 = ECustomer("Sarah")c3.setProductDetails("Headphone", 1200)print("=========================")c1.printDetail()print("=========================")c2.printDetail()print("=========================")c3.printDetail()print("=========================")print("Total E-Customer:", ECustomer.count)Output:Total E-Customer: 0=========================Name: JamesProducts: TV, Air CoolerTotal cost: 44000=========================Name: MikeProducts: Mobile, Headphone, FridgeTotal cost: 66200=========================Name: SarahProducts: HeadphoneTotal cost: 1200=========================Total E-Customer:…
Implement a class that simulates a traffic light. The next method advances the color in the usual way, from green to yellow to red, then again to green. Provide two constructors, as described in the documentation of the public interface. Also supply a method that yields the number of times that this traffic light has been red. /** A simulated traffic light.*/public class TrafficLight{ private String color; private int reds; /** Constructs a green traffic light. */ public TrafficLight() { /* Your code goes here */ } /** Constructs a traffic light. @param initialColor the initial color "green", "yellow", or "red" */ public TrafficLight(String initialColor) { /* Your code goes here */ } /** Moves this traffic light to the next color. */ public void next() { /* Your code goes here */ } /** Returns the current color of this traffic light. @return the current color */ public String getColor() {…
Fancy Integer ArrayList (ONLY NEED HELP WITH WRITING TEST CASES) For example, we have defined a “testRemoveInt” method for you (see below) which tests the “remove” method. Pass the tests provided then write additional tests where it says “// TODO”. You’ll do this for each unit test method in the program. import static org.junit.jupiter.api.Assertions.*; import java.util.ArrayList; import org.junit.jupiter.api.Test; class CustomIntegerArrayListTest { @Test void testSpliceIntInt() { CustomIntegerArrayList arr1 = new CustomIntegerArrayList(); arr1.add(2); arr1.add(3); arr1.add(4); arr1.add(5); arr1.add(6); arr1.splice(3, 2); ArrayList<Integer> lst1 = new ArrayList<Integer>(); lst1.add(2); lst1.add(3); lst1.add(4); assertEquals((int) lst1.get(0), (int) arr1.get(0)); assertEquals((int) lst1.get(1), (int) arr1.get(1)); assertEquals((int)…
Override the clone() method in the BankAccount class to perform deep copying. Verify your code in the main() method by creating a deep copy of a BankAccount object and displaying that the copied object is equivalent to the original object. public class BankAccount implements Cloneable{ private int accountNumber; private int balance; private Date createDate; // constructor for creating a bank account public BankAccount(int accountNumber, int balance) { this.accountNumber = accountNumber; this.balance = balance; this.createDate = new java.util.Date(); } //deposit money public int deposit(int amount) { balance = balance + amount; return balance; } //withdraw money public int withdraw(int amount) throws…
We have a main class that implements a parking charge class of a parking management system. We wanted to generate a junit test class for our main class. Generate a junit test class for our main class ParkingCharge class class Instant{public int hours;public int minutes;} public class ParkingCharge{public String permitID;public String lotID;public double amount;public Instant incurredTime = new Instant(); // toString class definition@Overridepublic String toString(){String permitDetails = "\nPermit ID: "+permitID;String lotDetails = "\nLot ID: "+lotID;String incurredDetails="\nDuration: "+incurredTime.hours+" HH "+incurredTime.minutes+" MM"; // lets say 1 minutes of parking charge is 1 dollaramount = incurredTime.hours*60 + incurredTime.minutes; String amountDetails = "\nParking Charge: "+amount; return permitDetails+lotDetails+incurredDetails+amountDetails;}} Main Class import java.util.Scanner;public class main {public static void main(String [] args){Scanner sc = new…
write the java mini project and upload the code .class as like this and also provide the screenshot of the code. use these method for insert ,remove and search public boolean insertBook(Book b) { for(int i=0; i<books.length; i++) { if(books[i] == null) { books[i] = b; return true; } } return false; } public boolean removeBook(Book b) { for(int i=0; i<books.length; i++) { if(books[i].getIsbn().equalsIgnoreCase(b.getIsbn())) { for(int j=i; j<books.length-1; j++) { books[j] = books[j+1]; } return true; } } return false; } public Book searchBook(String isbn) { for(int i=0; i<books.length; i++) { if(books[i] != null) {…