Java: An Introduction to Problem Solving and Programming (8th Edition)
8th Edition
ISBN: 9780134462035
Author: Walter Savitch
Publisher: PEARSON
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Chapter 10, Problem 10E
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The history teacher at your school needs help in grading a True/False test. The students’ IDs and test answers are stored in a file. The first entry in the file contains answers to the test in the form:TFFTFFTTTTFFTFTFTFTTEvery other entry in the file is the student ID, followed by a blank, followed by the student’s responses. For example, the entry:ABC54301 TFTFTFTT TFTFTFFTTFTindicates that the student ID is ABC54301 and the answer to question 1 is True, the answer to question 2 is False, and so on. This student did not answer question 9. The exam has 20 questions, and the class has more than 150 students. Each correct answer is awarded two points, each wrong answer gets one point deducted, and no answer gets zero points.
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, followed by the test grade. Assume the following grade scale:90%–100%, A; 80%–89.99%, B; 70%–79.99%, C; 60%–69.99%, D; and…
Write a java program that:
1. Create a file with the name "BankAccount.txt" and has the following
content (the account name, account number and balance of each account)
The file will look like this:
Amani Ali 12345432 500
Sarah Mohammad 456663343 4000
Omimah khalid 998787655 2000
Monirah Ahmad 55433424 10000
2. Read the file "BankAccount.txt" content one by one and increase the
balance by 50% for each account, then write the result in a new file with
the name "UpdatedAccount.txt". The new file content should have the
following structure:
Amani Ali 12345432 750
Sarah Mohammad 456663343 6000
Omimah khalid 998787655 3000
Monirah Ahmad 55433424 15000
3. Read an account number from the user and search the file
"UpdatedAccount.txt", then print all the information of this account if
exists, otherwise display a message "this account not found".
Note:-
Search google to find some of the built-in methods to help you in this
program, such as trim(), split(), equals(), Integer.parseInt().
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
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