Exercises Java with Examples-
Practice Exercises Java 4,5 5 302940

Invert binary file - 2 - Practice Exercises Java


Lesson 8:

File management


Exercise 8.23:

Invert binary file - 2


Objetive:

Create a program to "invert" a file, using a "FileStream": create a file with the same name ending in ".inv" and containing the same bytes as the original file but in reverse order (the first byte will be the last, the second will be the penultimate, and so on, until the last byte of the original file, which should appear in the first position of the resulting file).

You must deliver only the ".cs" file, which should contain a comment with your name


Source Code:


import java.util.*;
public class Main
{
	public static void main(String[] args)
	{
		String fileName;

		System.out.print("Enter the name of file to convert: ");
		fileName = new Scanner(System.in).nextLine();

		java.io.FileInputStream myFileReader = File.OpenRead(fileName);

		long size = myFileReader.getLength();

		byte[] data = new byte[size];
		myFileReader.read(data, 0, (int)size);
		myFileReader.close();

		java.io.FileOutputStream myFileWriter = File.Create(fileName + ".inv");

		for (long i = size - 1; i >= 0; i--)
		{
			myFileWriter.write(data[i]);
		}

		myFileWriter.close();
	}
}
Exercisey 8.23

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