Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
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Textbook Question
Chapter 17.4, Problem 17.4.10CP
What is wrong in the following code?
Import Java.io.*;
public class Test {
public static void main(String[] args) {
try {
FileInputStream fis = new FileInputStream(“test.dat”);){
}
catch (IOException ex) {
ex.printStackTrace();
}
catch (FileNotFoundExceptlon ex) {
ex.printStackTrace();
}
}
}
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import java.util.Scanner;import java.io.File;import java.io.IOException;public class test2{public static void main(String [] args)throws IOException{File database = new File ("flights.txt");Scanner fileReader = new Scanner( database );Scanner input = new Scanner(System.in);// Displays the welcome screenint menuCheck = 0;String city = "";float oneWayCost = 0f;float roundTripCost = 0f;int numberOfSeats = 0;float total = 0f;while (menuCheck == 0){System.out.println("Welcome TO MEjia AIRLINES.");System.out.println("Please select a choice below [1-5]");System.out.println(" 1. Add flight");System.out.println(" 2. View trip");System.out.println(" 3. Manage Trip");System.out.println(" 4. Checkout");System.out.println(" 5. Exit Mejia airlines");int userInput = input.nextInt();if (userInput == 5){System.out.println("Thank You for using Mejia airlines");System.out.println("Stay safe! Stay Hrydrated! Happy Coding!");menuCheck = -5;}else if (userInput == 1){menuCheck = 1;}else if (userInput ==…
import java.util.*;public class TestAverage {public static void main(String[] args) {int test1, test2, test3, sum;Scanner reader = new Scanner(System.in);System.out.println("Enter test 1");test1 = reader.nextInt();System.out.println("Enter test 2");test2 = reader.nextInt();System.out.println("Enter test 3");test3 = reader.nextInt();sum = test1 + test2 + test3;System.out.println("The sum is " + sum);System.out.println("The average is " + sum / 3);}}a. Briefly explain what this code does.b. There is one logic error in this code explain what is wrong and how to fix it.
Chapter 17 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 17.2 - What is a text file and what is a binary file? Can...Ch. 17.2 - How do you read or write text data in Java? What...Ch. 17.3 - Prob. 17.3.1CPCh. 17.3 - How is a Java character represented in the memory,...Ch. 17.3 - If you write the string ABC to an ASCII text file,...Ch. 17.3 - If you write the string 100 to an ASCII text file,...Ch. 17.3 - What is the encoding scheme for representing a...Ch. 17.4 - Prob. 17.4.1CPCh. 17.4 - Why should you always close streams? How do you...Ch. 17.4 - Prob. 17.4.3CP
Ch. 17.4 - Does FileInputStream/Fi1eOutputStream introduce...Ch. 17.4 - What will happen if you attempt to create an input...Ch. 17.4 - How do you append data to an existing text file...Ch. 17.4 - Prob. 17.4.7CPCh. 17.4 - What is written to a file using writeByte(91) on a...Ch. 17.4 - How do you check the end of a file in an input...Ch. 17.4 - What is wrong in the following code? Import...Ch. 17.4 - Suppose you run the following program on Windows...Ch. 17.4 - After the following program is finished, how many...Ch. 17.4 - For each of the following statements on a...Ch. 17.4 - What are the advantages of using buffered streams?...Ch. 17.5 - How does the program check if a file already...Ch. 17.5 - How does the program detect the end of the file...Ch. 17.5 - How does the program count the number of bytes...Ch. 17.6 - Prob. 17.6.1CPCh. 17.6 - Prob. 17.6.2CPCh. 17.6 - Is it true that any instance of...Ch. 17.6 - Prob. 17.6.4CPCh. 17.6 - Prob. 17.6.5CPCh. 17.6 - What will happen when you attempt to run the...Ch. 17.7 - Can RandomAccessFi1e streams read and write a data...Ch. 17.7 - Create a RandomAccessFi1e stream for the file...Ch. 17.7 - What happens if the file test.dat does not exist...Ch. 17 - (Create a text file) Write a program to create a...Ch. 17 - (Create a binary data file) Write a program to...Ch. 17 - (Sum all the integers in a binary data file)...Ch. 17 - (Convert a text file into UTF) Write a program...Ch. 17 - Prob. 17.5PECh. 17 - Prob. 17.6PECh. 17 - Prob. 17.7PECh. 17 - (Update count) Suppose that you wish to track how...Ch. 17 - (Address book) Write a program that stores,...Ch. 17 - (Split files) Suppose you want to back up a huge...Ch. 17 - (Split files GUI) Rewrite Exercise 17.10 with a...Ch. 17 - Prob. 17.12PECh. 17 - (Combine files GUI) Rewrite Exercise 17.12 with a...Ch. 17 - (Encrypt files) Encode the file by adding 5 to...Ch. 17 - (Decrypt files) Suppose a file is encrypted using...Ch. 17 - (Frequency of characters) Write a program that...Ch. 17 - (BitOutputStream) Implement a class named...Ch. 17 - (View bits) Write the following method that...Ch. 17 - (View hex) Write a program that prompts the user...Ch. 17 - (Hex editor) Write a GUI application that lets the...
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