Your task is to read a file containing arithmetic instructions such as В + 4 10 7 * 11 Each instruction contains an integer, an operator (+, -, or *), and another integer. Return an array list of the results. If there is any error, throw an I0Exception. Arithmetic.java 1 import java.io.File; 2 import java.io.I0Exception; 3 import java.util.ArrayList; 4 import java.util.Scanner; 5 6 public class Arithmetic 7 { /** This class reads a file containing arithmetic expressions and returns an array list of the results. @param filename the file name @return a list of results */ public static ArrayList read (String filename) throws IOException { 8 9 10 11 12 13 14 15 16 17 } 18 // This method checks your work. Do not touch it. 19 20 public static String check(String filename) { try 21 22 23

Your task is to read a file containing arithmetic instructions such as В + 4 10 7 * 11 Each instruction contains an integer, an operator (+, -, or *), and another integer. Return an array list of the results. If there is any error, throw an I0Exception. Arithmetic.java 1 import java.io.File; 2 import java.io.I0Exception; 3 import java.util.ArrayList; 4 import java.util.Scanner; 5 6 public class Arithmetic 7 { /** This class reads a file containing arithmetic expressions and returns an array list of the results. @param filename the file name @return a list of results */ public static ArrayList read (String filename) throws IOException { 8 9 10 11 12 13 14 15 16 17 } 18 // This method checks your work. Do not touch it. 19 20 public static String check(String filename) { try 21 22 23

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

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…
Write a program in java that will continue to prompt the user for numbers, storing them in an array, until they enter "Done" to finish, then prompts the user for a file name so that these values can be saved to that file. For example, if the user enters "output.txt", then the program should write the numbers that have been read to "output.txt".
ONLY IN JAVA PLS Make as simple as possible Modify the attached program to read in the contents of "A Tale of Two Cities" (download from gutenberg.org) and store each word that is longer than 4 characters in an ArrayList. Use command line arguments for the file name and the minimum length (4). Print the first ten words and last ten words that are in your ArrayList. Upload your .java file and the output of running it. import java.io.File;import java.io.FileNotFoundException;import java.util.Scanner; public class Files{ public static void main(String[] args) throws FileNotFoundException { int minimumStringLength = Integer.parseInt(args[1]); // Open the file. File file = new File("replaceMe"); Scanner inputFile = new Scanner(file); inputFile.useDelimiter("[^a-zA-Z]+"); // Read until the end of the file. while (inputFile.hasNext()) { String word = inputFile.next(); System.out.println(word); }…
Write a program that replaces all occurrences of a word with anew word in all the files under a directory, recursively. Pass the parameters fromthe command line as follows:java Exercise18_31 dirName oldWord newWord
I need to store data from a text file into an object array then store the object array into a linked list using Java Example of file im trying to convert: //String //Int //Double //Double //Int Joe 101 17.2 10.0 4 Alex 97 15.3 12.5 7 Maria 85 16.4 18.2 9 Steve 153 23.5 16.3 8
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…
Hi, could you help me resolve this java problem? I don't get why it can't accept my "array of (Song) objects"? And, If possible could you explain to me your change in pseudo-code in your correction, please. Here, what i have done: import java.io.*; /** This program creates a list of songs for a CD by reading from a file.*/ public class CompactDisc{ public static void main(String[] args)throws IOException { FileReader file = new FileReader("Classics.txt"); BufferedReader input = new BufferedReader(file); String title; String artist; Song[] cd= new Song[6]; // ADD LINES FOR TASK #3 HERE // Declare an array of Song objects, called cd, // with a size of 6 for (int i = 0; i < cd.length; i++) { title = input.readLine(); artist = input.readLine(); //Song dc= new Song(title,artist); cd[i]= new Song(title,artist); // ADD LINES FOR TASK #3 HERE // Fill the array by creating a…
When I attempt to run this program, I am getting an ArrayIndexOutOfBounds Exception on line 21 of the given Main. What is causing this to occur and what can be done to fix it? import java.io.BufferedReader;import java.io.FileReader;import java.io.IOException;import java.util.LinkedList;public class Main{public static void main(String[] args) throws IOException {// Create a new LinkedList object for holding the ValueData object:LinkedList<ValueData> linkedList = new LinkedList<>();// Create a new ObjectStack objectObjectStack objectStack = new ObjectStack();// Read a text file containing lines (records) of ValueData.// This is in order to fill the LinkedList with ValueData from the file.BufferedReader reader = new BufferedReader(new FileReader("values.txt"));String line = reader.readLine();while (line != null) {String[] parts = line.split(",");String name = parts[0].trim();int value = Integer.parseInt(parts[1].trim());ValueData data = new ValueData(name,…
How do I import a image file, for example a flower.png with the image of a sunflower, to a java program through JGrasp, and create a method that uses arrays to generate multiple sunflowers from the image file in random locations. So essentially when I run the program a window should pop up showing 10 sunflowers randomly generated in different locations in the window.
Write a Java Program named EmployeeRecords that simulates a company's HR system. Theprogram reads a list of employee ids, names, and salaries from a file a3q1.txt, and stores theinformation in parallel array lists ids, names, and salaries.Sample input (a3q1.txt)132 Dumbledore 90000465 Lupin 60000443 McGonagall 75000124 Snape 70000337 Sprout 62000 retrieveEmployeeRecord(...) that accepts the array list of employee IDs and anemployee ID to find, and returns the index of the entry.●reportBySalary(...) that accepts all 3 of the array lists and a minimum salary, anddisplays the list of employees that meet the criteria.Sample output 1:Make a selection:[A] Retrieve employee information[B] Display report by salaryAEnter the employee number:465Name: LupinSalary: 60000end of programSample output 2:Make a selection:[A] Retrieve employee information[B] Display report by salaryBEnter the minimum salary:70000Employees with salary of 70000 or higher:132 Dumbledore, Salary: 90000443 McGonagall,…
Write a java program named EmployeeRecords that simulates a company’s HR system. Theprogram reads a list of employee ids, names, and salaries from a file a3q1.txt, and stores theinformation in parallel array lists ids, names, and salaries.Sample input (a3q1.txt)132 Dumbledore 90000465 Lupin 60000443 McGonagall 75000124 Snape 70000337 Sprout 62000Your program will prompt the user to make a selection: retrieve an employee record by employeeID or display a salary report.You must include 2 methods:●retrieveEmployeeRecord(...) that accepts the array list of employee IDs and anemployee ID to find, and returns the index of the entry.
Find all the indexes whose labels equal 2 using np.where and the label array y. The output should be saved in two class idx.Reminder: Remember to index np.where() at zero # TODO two_class_idx = np.where(y == 2 )[0] print(f"two_class_idx output: \n {two_class_idx}") try: print(f"two_class_idx shape: {two_class_idx.shape}") except Exception: pass ([ (isinstance(two_class_idx, np.ndarray),f'two_class_idx is not an NumPy array! two_class_idx is currently a {type(two_class_idx)}'), (np.all(two_class_idx == np.array([3,9,11,12,16])),'two_class_idx does not contain the correct location values') ])