Question

Exercise 1: Create a file by using any word processing program or text editor. Write an application that displays the file's name, size, and time of last modification. Save the file as FileStatistics.java. Exercise 2: Create a file that contains your favorite movie quote. Use a text editor, such as Notepad, and save the file as Quote.txt. Copy the file contents and paste them into a word processing program, such as Word. Save the file as Quote.doc. Write an application that displays the sizes of the two files as well as the ratio of the two file sizes. Save the file as FileStatistics2.java. Exercise 3: Write an application using the FileInputStream that opens a file which contains the name of the user's favorite book and then displays it to the user. If the file does not exist, prompt the user for the book's title, and then write it to the file by using a FileOutputStream. Save the file as DisplayBook.java. Place the following files in a folder, and label it "Lesson 4." Zip the folder as described in the Syllabus. FileStatistics.java, FileStatistics2.java, Quote.txt, Quote.doc, and DisplayBook.java

Answer 1

DisplayBook.java

import java.io.*;
import java.util.*;
public class DisplayBook
{
   public static void main(String[] args)
    {
      int letter;
    
      try
       {
         File favBook = new File("FavoriteBook.txt");
       
         if(favBook.exists())
          {
            FileInputStream in = new FileInputStream(favBook);
       
            while((letter = in.read()) != -1)
             {
               System.out.print((char)letter);
             }       
          }
         else
          {
            Scanner input = new Scanner(System.in);
            FileOutputStream outStream = new FileOutputStream(favBook);
          
            System.out.print("Enter your favorite book >> ");
            String book = input.nextLine();
          
            for(int x = 0; x < book.length(); ++x)
               outStream.write(book.charAt(x));
          
            outStream.close();
          }
        }
      catch(IOException e)
       {
         System.out.print("Error with File");
       }
    }
}

FavoriteBook.txt

winesburg

FileStatistics.java

import java.io.*;
import java.util.*;
public class FileStatistics
{
   public static void main(String[] args)
    {
      try
       {
         File myFile = new File("File.txt");
    
         //Create Date object to make time more readable
         Date time = new Date(myFile.lastModified());
    
         System.out.print("File name: " + myFile.getName() + "\nSize: " +
            myFile.length() + "\nLast modified: " + time);
       }
      catch(Exception e)
       {
         System.out.println("Error: cannot display file");
       }
    }
}

File.txt

This is a text file created in atom text editor.
This file was created on December 23rd 2016 at 10:17pm.
This file is used in Chapter 13 exercises.

FileStatistics2.java

import java.io.*;
public class FileStatistics2
{
   public static void main(String[] args)
    {
      try
       {
         File noteQuote = new File("Quote.txt");
         File wordQuote = new File("Quote.docx");
       
         double ratio = wordQuote.length() / noteQuote.length();
       
         System.out.println("Notepad file size: " + noteQuote.length() +
            "\nWord file size: " + wordQuote.length());
         System.out.print("The ratio of the two is: " + ratio);
       }
      catch(Exception e)
       {
         System.out.println("Error");
       }
    }
}