Can someone assist in with answering this question please? DataReader.java: A class that reads data from the sample data files. You will need to modify thisclass to create Book and Author objects, associate them and then return a filled Book[] array. Thisarray is used in the Catalogue class. You have to extract the Author data from the lines yourselfwhere the "/“ delimiter separates multiple author names. import java.io. File;import java.util. Scanner;public class DataReader {public Book[] readFile () {try (String path = "100books.txt";File dataFile = new File (path);Scanner fileReader = new Scanner (dataFile) ;String[] bookdetails = new String [5];String line;while (fileReader.hasNextLine ()) {line = fileReader.nextLine ():bookdetails = line.split (","):;System.out.println (bookdetails[0] +"," +bookdetails[1] +"," +bookdetails [2]+"," +bookdetails[3]+"," +bookdetails[4] ) :fileReader.close () ;}catch (Exception e) {System.out.println (e.toString ());return null;

Sample data: author = Author(name='Lisa Unger',age=45)>>> author.save()>>> genre =…

DataReader.java: A class that reads data from the sample data files. You will need to modify this class to create Book and Author objects, associate them and then return a filled Book[] array. This array is used in the Catalogue class. You have to extract the Author data from the lines yourself where the "/“ delimiter separates multiple author names.

DataReader.java: A class that reads data from the sample data files. You will need to modify this class to create Book and Author objects, associate them and then return a filled Book[] array. This array is used in the Catalogue class. You have to extract the Author data from the lines yourself where the "/“ delimiter separates multiple author names.

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

In Java import java.util.Scanner; public class ShoppingList { public static void main (String[] args) { Scanner scnr = new Scanner(System.in); ItemNode headNode; // Create intNode objects ItemNode currNode; ItemNode lastNode; String item; int i; // Front of nodes list headNode = new ItemNode(); lastNode = headNode; int input = scnr.nextInt(); for(i = 0; i < input; i++ ){ item = scnr.next(); currNode = new ItemNode(item); lastNode.insertAtEnd(headNode, currNode); lastNode = currNode; } // Print linked list currNode = headNode.getNext(); while (currNode != null) { currNode.printNodeData(); currNode = currNode.getNext(); } } } ----------------------------------------- public class ItemNode { private String item; private ItemNode nextNodeRef; // Reference to the next node public ItemNode() { item = ""; nextNodeRef = null; } // Constructor public ItemNode(String itemInit) { this.item = itemInit; this.nextNodeRef = null; } // Constructor public…
using Java, create a virtual shopping store. using the two txt files (items and sale), display a list of items, price and if on sale. have the user select what items they want until they press 'q' to quit. show list of what they purchased, add the total and how much they saved. class BillProcessor {public static void prepareBill(LinkedHashMap<String, Integer> purchases, LinkedHashMap<String,Double>items, LinkedHashMap<String,String> sales, ArrayList<String> itemNames) {total cost = 0total discount = 0for each item in purchases:compute the regular costif item is subject to a sale (i.e. it appears in the sales lhm)determine the sales price if it's bogo - mod operator and the int/intif it's not bogo - apply the discount pricecompute the actual cost based on thattotal cost = total cost + actual costtotal disc = total disc + discountprint a line formatted like the example that summarizes the purchase of that itemprint the summary}} public class KlumpGroceryStore…
import java.util.Scanner; public class LabProgram { public static Roster getInput(){ /* Reads course title, creates a roster object with the input title. Note that */ /* the course title might have spaces as in "COP 3804" (i.e. use nextLine) */ /* reads input student information one by one, creates a student object */ /* with each input student and adds the student object to the roster object */ /* the input is formatted as in the sample input and is terminated with a "q" */ /* returns the created roster */ /* Type your code here */ } public static void main(String[] args) { Roster course = getInput(); course.display(); course.dislayScores(); }} public class Student { String id; int score; public Student(String id, int score) { /* Student Employee */ /* Type your code here */ } public String getID() { /* returns student's id */…
import java.util.Scanner; public class Playlist { // TODO: Write method to ouptut list of songs public static void main (String[] args) { Scanner scnr = new Scanner(System.in); SongNode headNode; SongNode currNode; SongNode lastNode; String songTitle; int songLength; String songArtist; // Front of nodes list headNode = new SongNode(); lastNode = headNode; // Read user input until -1 entered songTitle = scnr.nextLine(); while (!songTitle.equals("-1")) { songLength = scnr.nextInt(); scnr.nextLine(); songArtist = scnr.nextLine(); currNode = new SongNode(songTitle, songLength, songArtist); lastNode.insertAfter(currNode); lastNode = currNode; songTitle = scnr.nextLine(); } // Print linked list…
import java.util.Scanner; public class StateInfo { /* Your code goes here */ public static void main(String[] args) { Scanner scnr = new Scanner(System.in); String stateCode; String stateName; stateCode = scnr.next(); stateName = scnr.next(); printStateInfo(stateCode, stateName); }}
import java.util.Scanner; public class DebugSix3 { public static final int TIME_WASTER = 500; public static void main(String[] args) throws InterruptedException { Scanner input = new Scanner(System.in); System.out.print("Enter a number between 1 and 20 >> "); int num = input.nextInt(); if (num < 1 || num > 20) { System.out.println("Number out of range!"); return; } for (int i = num; i > 0; i--) { System.out.print(i + " "); Thread.sleep(TIME_WASTER); } System.out.println("Blastoff!"); } } The files provided in the code editor to the right contain syntax and/or logic errors. In each case, determine and fix the problem, remove all syntax and coding errors, and run the program to ensure it works properly. An example of the program is shown below: Enter a number between 1 and 20 >> 5 5 4 3 2 1 Blastoff! Depending on the value assigned to the…
Java Program ASAP Here is a FileSorting program to read a CSV file, sorts a list of integers on each row, and prints a comma separated list of sorted integers on the console. Modify ir by removing or changing the main method os it passes all the test cases. import java.io.File;import java.io.FileNotFoundException;import java.util.ArrayList;import java.util.Scanner; public class FileSorting { private static final String FILENAME = "somefile.txt"; public static void main(String[] args) { // read integers from input file Scanner fileReader; ArrayList<Integer> numbers = new ArrayList<>(); try { fileReader = new Scanner(new File(FILENAME)); while(fileReader.hasNextLine()) { numbers.add(Integer.parseInt(fileReader.nextLine().trim())); } fileReader.close(); }catch(FileNotFoundException fnfe){ System.out.println("File " + FILENAME + " is not…
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); myCourse.printInfo(); myOfferedCourse.setCourseNumber(oCourseNumber); myOfferedCourse.setCourseTitle(oCourseTitle); myOfferedCourse.setInstructorName(instructorName); myOfferedCourse.setLocation(location); myOfferedCourse.setClassTime(classTime);…
import java.util.Scanner; public class Inventory { public static void main (String[] args) { Scanner scnr = new Scanner(System.in); InventoryNode headNode; InventoryNode currNode; InventoryNode lastNode; String item; int numberOfItems; int i; // Front of nodes list headNode = new InventoryNode(); lastNode = headNode; int input = scnr.nextInt(); for(i = 0; i < input; i++ ) { item = scnr.next(); numberOfItems = scnr.nextInt(); currNode = new InventoryNode(item, numberOfItems); currNode.insertAtFront(headNode, currNode); lastNode = currNode; } // Print linked list currNode = headNode.getNext(); while (currNode != null) { currNode.printNodeData(); currNode…
import java.io.File;import java.io.FileReader;import java.io.FileNotFoundException;import java.util.ArrayList;import java.util.Scanner; public class Client{Scanner sc = new Scanner(System.in);ArrayList <Student> students = new ArrayList<Student>();ArrayList <Student> courses = new ArrayList<Student>();// Method to read the file contents and stores it in// instance arraysvoid readStudents(){// Scanner class object declaredScanner readStuF = null;// try block beginstry{// Opens the file for readingreadStuF = new Scanner(new File("student.txt"));// Loops till end of the file to read recordswhile(readStuF.hasNextLine()){ String stu = readStuF.nextLine();String []eachStu = stu.split(" ");students.add(new Student(eachStu[0], eachStu[1],eachStu[2], Long.parseLong(eachStu[3]),Integer.parseInt(eachStu[4]), Integer.parseInt(eachStu[5]),Integer.parseInt(eachStu[6])));}// End of while loop }// End of try block// Catch block to handle file not found…
Write a Java program that incorporates a loop that prompts the user for student data. Student data are private fields in a student class including: String name String address double GPA Each student object is stored in a linked list. After the user completes the data entry, output the contents of the linked list in ascending sorted order by name to a regular text file that can be opened and viewed using a simple plain-text editor such as notepad. Validate numeric data for Grade Point Average (GPA).
import java.util.Scanner; public class ParkingFinder {/* Your code goes here */ public static void main(String[] args) { Scanner scnr = new Scanner(System.in); int numVisits; int duration; numVisits = scnr.nextInt(); duration = scnr.nextInt(); System.out.println(findParkingPrice(numVisits, duration)); }}