Java: An Introduction to Problem Solving and Programming (8th Edition)
8th Edition
ISBN: 9780134462035
Author: Walter Savitch
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 10, Problem 5E
Modify the class LapTimer, as described in Exercise 13 of Chapter 9, as follows:
- Add an attribute for a file stream to which we can write the times
- Add a constructor
LapTimer (n, person, fileName)
for a race having n laps. The name of the person and the file to record the times are passed to the constructor as strings. The file should be opened and the name of the person should be written to the file. If the file cannot be opened, throw an exception.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Java Problem
The teacher at a school needs help grading an exam with a number of True/False questions. The students’ IDs and test answers are stored in a file. The first entry of the file contains the answer to the test in the form:
TTFTFTTTFTFTFFTTFTTF
Every other entry in the file is the student’s ID, followed by a blank, followed by the students’ response. For instance, the entry:
ABC54102 T FTFTFTTTFTTFTTF TF
The student’s ID is ABC54102, answer to question 1 is True, the answer to question 3 is False. Also, the student did not answer question 2 and question 18. The exam has 20 questions. Here is the grading policy: each correct answer is awarded two points, each wrong answer get -1 point, and no answer gets 0 point. Write a program that processes the test data. The output should be the student’s ID, followed by the answers, followed by the test score (total points), followed by the test grade. Assume the following grade scale will be used: 90%-100%, A; 80%-89.99%, B; 70%-79.99%,…
Create a class employee with the data members such as name, id and total salary.create a file as "employee_data" as binary file and write the information of four employees to that file. open that file in reading mode and only display the record of 2nd and 3rd employees.By c++ language.
File Stream
Problem:
Implement a Caesar cipher that can encrypt and decrypt text and file. A Caesar cipher is a
substitution cipher that shifts the letters in the original message x spaces ascending the alphabet
where x is the key.
Example if the key for the cipher is 3, and the message is “I will be there.” Then the coded
message would be “L zloo eh wkhuh”
Program requirements:
Create a class call CCipher that has two member functions encrypt and decrypt.
The program should be able to encrypt/decrypt a message from a file as well as a
keyboard input.
The default key should be 3.
The user should be able to select between encrypting and decrypting and should be
allowed to do so multiple times until s/he decides to end the program.
The file format to be encrypted should be a “.txt” and the user should be able to provide
the name of the file to be encrypted, after which the file should be deleted.
The user should have the option to view…
Chapter 10 Solutions
Java: An Introduction to Problem Solving and Programming (8th Edition)
Ch. 10.1 - Why would anybody write a program that sends its...Ch. 10.1 - When we discuss input, are we referring to data...Ch. 10.1 - What is the difference between a text file and a...Ch. 10.2 - Write some code that will create a stream named...Ch. 10.2 - Prob. 5STQCh. 10.2 - Prob. 6STQCh. 10.2 - Prob. 7STQCh. 10.2 - Write some code that will create a stream named...Ch. 10.2 - Suppose you run a program that writes to the text...Ch. 10.2 - Prob. 10STQ
Ch. 10.3 - Prob. 11STQCh. 10.4 - Write some Java code to create an output stream of...Ch. 10.4 - Give three statements that will write the values...Ch. 10.4 - Give a statement that will close the stream toFile...Ch. 10.4 - What import statement(s) do you use when creating...Ch. 10.4 - Prob. 16STQCh. 10.4 - Give three statements that will read three numbers...Ch. 10.4 - Give a statement that will close the stream...Ch. 10.4 - Can you use writeInt to write a number to a file...Ch. 10.4 - Can you use readUTF to read a string from a text...Ch. 10.4 - Prob. 21STQCh. 10.4 - Prob. 22STQCh. 10.4 - Does the class FileInputStream have a method named...Ch. 10.4 - Does the class FileOutputStream have a constructor...Ch. 10.4 - Does the class ObjectOutputStream have a...Ch. 10.4 - Prob. 26STQCh. 10.4 - Suppose that a binary file contains exactly three...Ch. 10.4 - The following code appears in the program in...Ch. 10.4 - Prob. 29STQCh. 10.5 - Prob. 30STQCh. 10.5 - Prob. 31STQCh. 10.5 - Prob. 32STQCh. 10.5 - Prob. 33STQCh. 10.6 - Prob. 34STQCh. 10.6 - Prob. 35STQCh. 10 - Write a program that will write the Gettysburg...Ch. 10 - Modify the program in the previous exercise so...Ch. 10 - Write some code that asks the user to enter either...Ch. 10 - Write a program that will record the purchases...Ch. 10 - Modify the class LapTimer, as described in...Ch. 10 - Write a class TelephoneNumber that will hold a...Ch. 10 - Write a class contactInfo to store contact...Ch. 10 - Write a program that reads every line in a text...Ch. 10 - Repeat the previous exercise, but write the new...Ch. 10 - Write a program that will make a copy of a text...Ch. 10 - Suppose you are given a text file that contains...Ch. 10 - Suppose that you have a binary file that contains...Ch. 10 - Suppose that we want to store digitized audio...Ch. 10 - Write a program RecoverSignal that will read the...Ch. 10 - Even though a binary file is not a text file, it...Ch. 10 - Write a program that searches a file of numbers...Ch. 10 - Write a program that reads a file of numbers of...Ch. 10 - The following is an old word puzzle: Name a common...Ch. 10 - The Social Security Administration maintains an...Ch. 10 - The following is a list of scores for a game....Ch. 10 - Write a program that checks a text file for...Ch. 10 - Prob. 5PPCh. 10 - Prob. 6PPCh. 10 - Revise the class Pet, as shown in Listing 6.1 of...Ch. 10 - Write a program that reads records of type Pet...Ch. 10 - Prob. 12PP
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
What is an instance attribute?
Starting Out with Python (4th Edition)
Assume a program has the following variable definitions: int units; float mass; double weight; and the followin...
Starting Out with C++ from Control Structures to Objects (9th Edition)
(This is a better version of an exercise from Chapter 1.) A government research lab has concluded that an artif...
Absolute Java (6th Edition)
What is an object? What is a control?
Starting Out With Visual Basic (8th Edition)
Why is the study of database technology important?
Database Concepts (8th Edition)
Define each of the following terms: entity type entity-relationship model entity instance Attribute relationshi...
Modern Database Management (12th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Implement a simplified grocery Webshop in C programming language: Create a structure that contains a set of products and their number. A product has a name, price and quantity. Create two instances of this struct. The first represents the webshop store and the other represents a cart. Print a menu for the user that contains the following items: Load webshop store from a file\ This operation loads the content of the store from a text file. The filename should be read from the keyboard. The file contains the product name, price and quantity in the following format:Apple 100 42 Orange 130 59 Raspberry 231 17 ... Write the content of the store to a file\ Read a filename from the user and write the content of the store to that file using the file format above. Insert an item to cart\ The cart contains the items that a customer wants to buy. Read a product name and the quantity from the keyboard and put this information to the cart. The price of the product should be fetched from the store.…arrow_forwardPROGRAMMING LANGUAGE: C++ Implement another class with name UniversityClass which is composed of one teacher and multiple students(use student array) as data members. Another data member of UniversityClass is CourseName that is just a string data member. Write a function in UniversityClass to take Teacher Name, Student names and course name from user. Insert these records in a text file and print screenshot of that text file. Print UniversityClass code here. Print main function here. Print screenshot of text file here.arrow_forwardJava Your program must read a file called personin.txt. Each line of the file will be a person's name, the time they arrived at the professor's office, and the amount of time they want to meet with the professor. These entries will be sorted by the time the person arrived. Your program must then print out a schedule for the day, printing each person's arrival, and printing when each person goes in to meet with the professor. You need to print the events in order of the time they happen. In other words, your output will be sorted by the arrival times and the times the person goes into the professor's office. In your output you need to print out a schedule. In the schedule, new students go to the end of the line. Whenever the professor is free, the professor will either meet with the first person in line, or meet with the first person in line if nobody is waiting. Assume no two people arrive at the same time. You should solve this problem using a stack and a queue. You can only…arrow_forward
- Given a text file containing the availability of food items, write a program that reads the information from the text file and outputs the available food items. The program first reads the name of the text file from the user. The program then reads the text file, stores the information into four separate lists, and outputs the available food items in the following format: name (category) - description Assume the text file contains the category, name, description, and availability of at least one food item, separated by a tab character ('\t'). Ex: If the input of the program is: food.txt and the contents of food.txt are: Classic ham sandwich Available sandwich Chicken salad sandwich Not available Classic cheeseburger Cheeseburger Not available Salads Water 16oz bottled water Available Caesar salad Chunks of romaine heart lettuce dressed with lemon juice Available Salads Asian salad Mixed greens with ginger dressing, sprinkled with sesame Not available Beverages Beverages Mexican food…arrow_forwardGiven a text file containing the availability of food items, write a program that reads the information from the text file and outputs the available food items. The program first reads the name of the text file from the user. The program then reads the text file, stores the information into four separate lists, and outputs the available food items in the following format: name (category) - description Assume the text file contains the category, name, description, and availability of at least one food item, separated by a tab character (\t). Ex: If the input of the program is: food.txt and the contents of food.txt are: Sandwiches Ham sandwich Classic ham sandwich Available Sandwiches Chicken salad sandwich Chicken salad sandwich Not available Sandwiches Cheeseburger Classic cheeseburger Not available Salads Caesar salad Chunks of romaine heart lettuce dressed with lemon juice Available Salads: Asian salad Mixed greens with ginger dressing, sprinkled with sesame Not available Beverages…arrow_forwardAssignment: Use OOP to implement certain details and requirements for the assignment. The lab is about donkey kong characters and their statistics and information which is provided on a Monkey.txt file that must be read in. Some information of monkeys is below which will be used: Most species are arboreal, using all four limbs to leap from tree to tree. They can sit upright and stand erect. Most species run along branches rather than swinging arm over arm like apes. Monkeys are highly social omnivores, organized in clans as large as several hundred individuals headed by an old male. The underlines are at least behavior (member functions) that you are asked to add to your OOP program such as Leap(string, string), Sit(), Walk(), Swing()... Here are some descriptions of a monkey that must apply to your program. The information from the Monkey.txt file will be used along with the format below. Name Sit Walk Swing Leap Jump Banana Year…arrow_forward
- Given a text file containing the availability of food items, write a program that reads the information from the text file and outputs the available food items. The program first reads the name of the text file from the user. The program then reads the text file, stores the information into four separate lists, and outputs the available food items in the following format: name (category) - description Assume the text file contains the category, name, description, and availability of at least one food item, separated by a tab character (\t). Ex: If the input of the program is: food.txt and the contents of food.txt are: Ham sandwich Classic ham sandwich. Available. Sandwiches Sandwiches Chicken salad sandwich Chicken salad sandwich. Not available. Sandwiches Cheeseburger Classic cheeseburger Not available. Salads Caesar salad Chunks of romaine heart lettuce dressed with lemon juice. Available. Salads Asian salad Mixed greens with ginger dressing, sprinkled with sesame Not available.…arrow_forwardWrite a class FileConverter with a constructor that accepts a String file name as its argument. It should store filename as its attribute (with a accessor getFilename(). The class should have the following methods: • createUpperCaseFile(): Accepts a String parameter targetFilename. It will open up both the file specified in class attribute filename and the method parameter targetFilename. Then it will convert all lines of the class attribute filename to upper case and write it to target file, line by line. • createRowCharCountFile(): Accepts a String parameter targetFilename. It will open up both the file specified in class attribute filename and the method parameter targetFilename. Then it will count the number of chars in each line of the class attribute filename and write it to target file line by line. The class must come with a main() method, which will create an object instance and generate two target files based on the source file, one all upper case, and another row char count.arrow_forwardAssessment Description Honors Students: Complete this assignment according to the directions provided in the "Honors Addendum," located in Class Resources. This activity has multiple parts. All parts must be completed prior to documentation submission. Part 1: Reading and Writing Text Files. In this activity, you will learn how to read and write text files using non buffered and buffered File I/O classes, then learn how to parse a String into tokens using the String split() method, and finally, how to handle exceptions using various approaches. Part 2: Reading and Writing JSON Files. In this activity, you will learn how to read, write, and serialize JSON files to and from Java Objects. Refer to the instructions within "Activity 4 Guide" to complete the assignment. APA style is not required, but solid academic writing is expected. This assignment uses a rubric. Please review the rubric prior to beginning the assignment to become familiar with the expectations for successful…arrow_forward
- In this assignment, you will create a Java program to read undergraduate and graduate students from an input file, sort them, and write them to an output file. This assignment is a follow up of assignment 5. Like assignment 5, your program will read from an input file and write to an output file. The input file name and the output file name are passed in as the first and second arguments at command line, respectively. Unlike assignment 5, the Student objects are sorted before they are written to the output file. • The program must implement a main class, three student classes (Student, UndergradStudent, GradStudent), and a Comparator class called StudentIDComparator. • The StudentIDComparator class must implement the java.util.Comparator interface, and override the compare() method. Since the Comparator interface is a generic interface, you must specify Student as the type parameter when defining the StudentIDComparator class, i.e., public class StudentIDComparator implements…arrow_forwardPlease help me with the assignment below The assignment: Make a telephone lookup program. Read a data set of 1,000 names and telephone numbers from a file that contains the numbers in random order. Handle lookups by name and also reverse lookups by phone number. Use a binary search for both lookups. This assignment needs a resource class and a driver class. The resource class and the driver class will be in two separate files. The driver class needs to have only 5 or 7 lines of code. The code needs to be written in Java. Please help me with exactly what I asked for help.arrow_forwardin java 8.8 LAB: Course Grade Write a program that reads the student information from a tab separated values (tsv) file. The program then creates a text file that records the course grades of the students. Each row of the tsv file contains the Last Name, First Name, Midterm1 score, Midterm2 score, and the Final score of a student. A sample of the student information is provided in StudentInfo.tsv. Assume the number of students is at least 1 and at most 20. Assume also the last names and first names do not contain whitespaces. The program performs the following tasks: Read the file name of the tsv file from the user. Open the tsv file and read the student information. Compute the average exam score of each student. Assign a letter grade to each student based on the average exam score in the following scale: A: 90 =< x B: 80 =< x < 90 C: 70 =< x < 80 D: 60 =< x < 70 F: x < 60 Compute the average of each exam. Output the last names, first names, exam…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill Education
Starting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSON
Digital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSON
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Programmable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education
Constants, Variables, Data types, Keywords in C Programming Language Tutorial; Author: LearningLad;https://www.youtube.com/watch?v=d7tdL-ZEWdE;License: Standard YouTube License, CC-BY