Overview

This README provides guidance on performing file operations in Java using FileInputStream and FileOutputStream classes. These classes are part of Java's input/output (I/O) package and are used for reading from and writing to files, respectively.

Concepts Covered

1. Write to a File

• Description: Writing data to a file involves creating an output stream to the file and using methods provided by FileOutputStream to write data.

• Key Steps:

  -> Create an instance of FileOutputStream with the file name.

  -> Use the write() method to write data to the output stream.

  -> Close the stream to release system resources.

2. Read from a File

• Description: Reading data from a file involves creating an input stream from the file and using methods provided by FileInputStream to read data.

• Key Steps:

  -> Create an instance of FileInputStream with the file name.

  -> Use the read() method to read data from the input stream.

  -> Close the stream to release system resources.

3. Copy a File

• Description: Copying a file involves reading data from an input file and writing it to an output file.

• Key Steps:

  -> Create instances of FileInputStream and FileOutputStream with input and output file names.

  -> Read data from the input stream and write it to the output stream.

  -> Close both streams to release system resources.

4. File Encryption

• Description: The FileEncryption program demonstrates file encryption by reading data from an input file, applying a simple encryption algorithm (adding a fixed value to each byte), and writing the encrypted data to an output file. It then reads the encrypted data from the output file to demonstrate the encryption process.

• Key Steps:

  -> Create instances of FileInputStream and FileOutputStream with input and output file names.

  -> Read each byte from the input file, add a fixed value to it (in this case, 2), and write the encrypted byte to the output file.

  -> Write encrypted data to the output file.

  -> Read Read data from the input file.

  -> Close both streams to release system resources.

Usage

Each section includes example Java programs demonstrating the respective file operation. You can run these programs to understand how to perform file operations using FileInputStream and FileOutputStream.