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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StringFun.java
import java.util.Scanner; // Needed for the Scanner class
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*/
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public class StringFun
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/**
* @param args not used
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public static void main(String[] args)
{
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System.out.print("Please enter your first name: ");
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System.out.print("Please enter your last name: ");
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//Output the welcome message with name
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//Output the username
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//Output the initials
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//Find and output the first name with switched characters
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//All Done!
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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.
import java.util.Scanner;import java.io.FileInputStream;import java.io.FileOutputStream;import java.text.DecimalFormat;import java.io.IOException;
public class LabProgram { public static void main(String[] args) throws IOException { Scanner scnr = new Scanner(System.in); // Initialize variables for calculating exam averages int count = 0; double sumMid1 = 0, sumMid2 = 0, sumFinal = 0;
// Initialize FileOutputStream for output FileOutputStream fos = new FileOutputStream("report.txt");
// Prompt for the filename System.out.print("Enter the name of the TSV file: "); String fileName = scnr.nextLine();
FileInputStream fis = null; try { fis = new FileInputStream(fileName);
// Read the file and build the content string StringBuilder sb = new StringBuilder(); int ch; while ((ch = fis.read()) != -1) { sb.append((char) ch); }…
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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