CLI for data error detection that focuses on ParityCheck, Two Dimensional Parity, and Arithmetic Checksum.

This repository focuses on error detection mechanisms in the data link layer. Error detection is a crucial aspect of reliable data transmission, ensuring the integrity of information during the communication process.

Parity check is a simple and widely-used error detection method. Redundant bits, known as parity bits, are added to each character. This repository includes a class named ParityCheck that implements this error detection mechanism.

• Commonly used for ASCII characters with seven bits for encoding and the eighth bit for parity.
• Two basic forms: even parity and odd parity.
• Even parity ensures an even number of binary 1s, while odd parity ensures an odd number.

import me.araopj.dataErrorDetection.ParityCheck; import me.araopj.dataErrorDetection.Handler; public class Main { public static void main(String[] args) { Handler parityCheckHandler = new ParityCheck(); ParityCheck.oddValue = 0; ParityCheck.evenValue = 1; parityCheckHandler.handle("Hello, World!"); ParityCheck.oddValue = 1; ParityCheck.evenValue = 0; parityCheckHandler.handle("pitzzahh"); } }

The TwoDimensionalParity class in this repository implements the two-dimensional parity check. Blocks of data are organized as a two-dimensional array, enhancing the detection of burst errors.

• Each row of the array represents a data block to be transmitted.
• A parity bit is appended to each column based on whether even or odd parity is used.

The ArithmeticChecksum class provides functionality for error detection using an arithmetic checksum. A sequence of numbers and letters is used to check data for errors, and this sum is added to the end of the message before transmission.

• Commonly used in higher-level protocols such as TCP and IP.
• Involves checksum creation at the sender's side and checksum validation at the receiver's side.

The Helper class offers useful utility methods for integer-based operations, including functions to check whether a number is odd or even. Additionally, a method to obtain the ASCII binary equivalent of a character has been included.

• isOdd: Determines if a parity is odd.
• isEven: Determines if a parity is even.
• getAsciiBinary(char character): Retrieves the ASCII binary equivalent of a character.
• bitCount(long binary): Retrieves the bit count in a binary

If you use Maven or Gradle, add the following configuration to your project's pom.xml | build.gradle

Be sure to replace the VERSION key below with the one of the versions shown above

<dependencies> <!-- other dependencies are there --> <dependency> <groupId>me.araopj</groupId> <artifactId>data-error-detection</artifactId> <version>VERSION</version> </dependency> <!-- other dependencies are there --> </dependencies>

compile group: 'me.araopj', name: 'data-error-detection', version: 'VERSION'

Contributions are welcome! If you have ideas for improvements, bug fixes, or additional error detection methods, feel free to open an issue or submit a pull request.

Peter John Arao

This project is licensed under the MIT License.