Description
A program that tells the user if a parity-encoded word is valid or not, and if a Hamming codeword is valid or not.
A parity-encoded word is a series of binary digits (zero or one) where the left most digit is either a zero or one depending on the type of parity being used (EVEN or ODD). If a word is encoded with EVEN parity the number of one bits must be an even number. If a word is encoded with ODD parity the number of one bits must be an odd number.
For example, if the original word is: 100
- EVEN codeword is 1100 (1 + 1 is 2, an even number)
- ODD codeword is 0100 (1 is an odd number)
A Hamming encoded word is a series of binary digits (zero or one) where the 2x bits are either a zero or one depending on the type of parity being used (EVEN or ODD)
For example, if the original word is: 10
- EVEN codeword is 11100
- ODD codeword is 00110
For more information on parity checking read: http://en.wikipedia.org/wiki/Parity_bit.
For more information on Hamming codes read: http://en.wikipedia.org/wiki/Hamming_code.
Technical Knowledge
I applied my knowledge of:
- Java basics including GUI classes
- regular expressions
- object oriented programming.
Skills Applied
I developed these skills while making this artifact:
- working with the NetBeans IDE
- test-driven design using NetBeans
- object oriented programming with Java.
Notes
I wrote this for BCIT’s COMP 2526, Intermediate Java, in January 2008.
I employed an iterative, test-driven approach. My first iteration resulted in a program that checked the parity of a codeword entered as a command-line argument. The second iteration added logic to check Hamming codewords, and the third and final iteration added a GUI envelope for the program.
The application was written using NetBeans against a series of Unit tests provided by our instructor, D’Arcy Smith.
Demonstration
Download the source code [7 KB].
Download the JAR file here [21 KB]. Navigate to the download folder with your command prompt and run using:
java -jar Parity_Validator_3.jar
