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
Videos
Textbook Question
Chapter 10.4, Problem 27STQ
Suppose that a binary file contains exactly three numbers written to the file using the method writeDouble of the class ObjectOutputStream. Suppose further that you write a
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
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…
Implement (in Java) a console application for writing data to a sequential text file with a formatter class in Java :
a. Implement createFile() method – To open/create a new file named as ‘mec.txt’ with explanations of the methods involved.
b. Implement writeRecord() method – User enter the employee name, employee id, gross salary, tax rate, income tax and net salary from the keyboard and write/add these values to the file ‘mec.txt’ with explanations of the methods involved. The input fields must be validated as necessary.
c. Implement closeFile() method – Close the file with explanations of the methods involved.
Write a program that will read the file text.txt which is provided and the encryptedmessage in there. Please write back the decrypted message into the output.txt file.When you see the message in the output.txt file, you need to submit the java codefile. You need to use Rot13 class for decrypting the message. Do not need to submit in the output.txt file.
file example:
public class FileExample {
public static void main(String[]args){
try {//create file object for input.txtFile in_file = new File("src/input.txt");//create file object for output.txtFile out_file = new File("src/output.txt");
//read the input.txt file with ScannerScanner read = new Scanner(in_file);//write the output.txt file with PrintWriterPrintWriter w = new PrintWriter(out_file);
while(read.hasNextLine()){w.write(read.nextLine());}
//don't forget to closew.close();
// while(scan.hasNext()){// System.out.println(scan.next());// }
}catch(Exception ex){ex.getStackTrace();}
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
1‘21 Same as Problem 1.20, excepi the anicle should be
on safety as related to su rveying-
Elementary Surveying: An Introduction To Geomatics (15th Edition)
In what year was Plankalkl designed? In what year was that design published?
Concepts Of Programming Languages
State whether each of the following is true or false. A set of statements contained within a pair of parenthese...
Java How to Program, Early Objects (11th Edition) (Deitel: How to Program)
What class do you use to work with random access files?
Starting Out with Java: From Control Structures through Data Structures (4th Edition) (What's New in Computer Science)
What different kinds of surfaces can be produced by turning versus facing?
Degarmo's Materials And Processes In Manufacturing
Does the following algorithm have a polynomial or nonpolynomial time complexity? Explain your answer. def myste...
Computer Science: An Overview (13th Edition) (What's New in Computer Science)
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
- consider a program that reads data from a text file called: "klingon-english.txt" (shown below). How would one construct such a program with the following conditions: 1. Ask the user to choose a Klingon consonant they want to practice with. Ask again if the user’s answer is not a valid Klingon consonant, until the user enters a valid consonant. 2. Find a Klingon word that starts with the chosen consonant (the text file contains only one word that starts with any given consonant, so you don’t need to use the random library) 3. Ask the user to translate the chosen word into Klingon 4. Print "Correct" if the user’s answer is correct 5. Print "Sorry, you’re wrong!" if the user’s answer is wrong 6. Print The correct answer is ... if all three user’s answers are wrong You will also factor in this version: 7. If the answer is incorrect, show the first hint: the first and last characters of the correct Klingon word. When showing a hint, replace all other characters with a star (*) 8. If the…arrow_forwardWhen texting or tweeting, it’s not uncommon to shorten words to save time or space, as by omitting vowels, much like Twitter was originally called twttr. In a file called twttr.py, implement a program that prompts the user for a str of text and then outputs that same text but with all vowels (A, E, I, O, and U) omitted, whether inputted in uppercase or lowercase. USE PYTHON PLEASE SEE IMAGE FOR MORE DETAILS. THANKS.arrow_forwardwrite a program with python that asks the user to enter two filenames. One filecontains a list of words that you want to count. For the following explanation, let’s call it words.txt.(When your program runs, the user could type a different name. Do not hardcode any filenames inyour code.) The second file contains the text that you want to search for each word. For theexplanation, let’s call it story.txt.Ask the user to enter the name of each file. Assume that the files are located in the same directoryas your code file.For each word in words.txt, search through story.txt and count how many times the word occurs.Print a summary similar to the sample output below.Note 1: You should consider a “word” to be anything bounded by whitespace. You do not need todo any processing to account for punctuation or other special characters. For example, in thesample below, “time.” (with a period) is not considered the same as the word “time” (without aperiod). Capitalization will also matter. “The”…arrow_forward
- Write a Java program that reads in a paragraph of text from a file and prompts the user to enter a word to search for. The program should then output the number of times the word appears in the paragraph. Here are the basic steps to implement this program: Prompt the user to enter the name of the input file. Read in the paragraph of text from the input file. Prompt the user to enter a word to search for. Search the paragraph for the word and count the number of times it appears. Output the number of times the word appears in the paragraph. To implement step 4, you can use a similar approach to the example I provided in class: Split the paragraph into an array of words using the split() method. Iterate through each word in the array and compare it to the search word (ignoring case). If the word matches the search word, increment a counter variable.arrow_forwardWrite a complete program that uses an ifstream object to read integers from a file called numbers.txt, and an ofstream object to write into a file called evens.txt.Your program should have loop that reads each integer from the input file, then writes it into the output file if it is an even number. Write each even number in na separate line.Make sure to close both files before your program terminates.arrow_forwardSuppose that a binary file contains exactly three numbers written to the file using the method writeDouble of the class ObjectOutputStream. Suppose further that you write a program to read all three numbers using three invocations of the method readDouble of the class ObjectInputStream. If your program invokes readDouble a fourth time, what will happen?arrow_forward
- in java' Variables fStream and dataFS are FileInputStream and Scanner, respectively. String fileName is assigned a file's name read from input. Perform the following tasks: Assign fStream with a FileInputStream that opens the file fileName for reading. Assign dataFS with a Scanner created using fStream. Click here for example Ex: If the input is peach2.txt and: Data in file peach2.txt 4.3 then the output is: 4.3 GroceryDataProcessor.java peach1.txt peach2.txt peach3.txt public class GroceryDataProcessor { publicstaticvoidmain(String[] args) throwsIOException { Scannerscnr=newScanner(System.in); StringfileName; doublepeachWeight; FileInputStreamfStream=null; ScannerdataFS=null; fileName=scnr.next(); /* Your code goes here */ peachWeight=dataFS.nextDouble(); System.out.println(peachWeight); fStream.close(); } }arrow_forwardWrite an address book program that stores your contacts' names and their email addresses. The names and email addresses are originally stored in a file called phonebook.in, in the format: Harry Pottertheboywholived@hogwarts.eduHermione Grangerbrightestwitch@hogwarts.eduRon Weasleyroonilwazlib@hogwarts.eduDraco Malfoymyfatherwillhearaboutthis@hogwarts.eduSeverus Snapehalfbloodprince@hogwarts.eduAlbus Dumbledorealasearwax@hogwarts.edu Your program should read from the file, storing the names and corresponding email addresses in a dictionary as key-value pairs. Then, the program should display a menu that lets the user enter the numbers 1 through 5, each corresponding to a different menu item: 1) look up an email address2) add a new name and email address3) change an email address4) delete a name and email address5) save address book and exit When the user enters 1, the program should prompt them for a name, and then print the corresponding email address. If there is no dictionary entry…arrow_forwardWrite a program that reads two input files whose lines are ordered by a key data field. Your program should merge these two files, writing an output file that contains all lines from both files ordered by the same key field. As an example, if two input files contain student names and grades for a particular class ordered by name (the key field), merge the information as shown below. File 1 and file 2 are supplied. Here is an algorithm to merge the data from two files: Read a line from each data file While the end of both files has not been reached While the end of both files has not been reached Write the line from file 1 to the output file and read a new line from file 1. Else Write the line from file 2 to the output file and read a new line from file 2. Write the remaining lines (if any) from file 1 to the output file. Write the remaining lines (if any) from file 2 to the output file. See the Merging Filesslides attachedto the project in Canvasfor a visual look at this algorithm.arrow_forward
- Create a program that reads a text file containing a 15 x 15 grid which represents a block of human cells and find the number of blobs of cancerous cells in the grid. The cells are depicted with a plus sign + if they are healthy, and a minus sign - if they are cancerous. Use the Flood Fill algorithm to determine the number of blobs. The program must be in Java language.arrow_forwardSuppose you have Java source files under the directorieschapter1, chapter2, . . . , chapter34. Write a program to remove the statement package chapteri; in the first line for each Java source file underthe directory chapteri. Suppose chapter1, chapter2,. . . , chapter34are under the root directory srcRootDirectory.The root directoryandchapteridirectory may contain other folders and files. Use the followingcommand to run the program:java Exercise12_20 srcRootDirectoryarrow_forwardWrite a program that reads a file containing two columns of floating-point numbers Prompt the user of the file name.Print the average of each column. javaarrow_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
Files & File Systems: Crash Course Computer Science #20; Author: CrashCourse;https://www.youtube.com/watch?v=KN8YgJnShPM;License: Standard YouTube License, CC-BY
UNIX Programming (Part - 10) The File System (Directories and Files Names); Author: ITUTEES;https://www.youtube.com/watch?v=K35faWBhzrw;License: Standard Youtube License