maxime-bc/huffman-java

Compress and uncompress a text file using Huffman algorithm.

Huffman coding in java

Compress and uncompress a text file using Huffman algorithm.

Subject

Compile and execute

cd src/
javac *.java
java Main

Usage

Main [-ehuV] -i=<inputFile> -o=<outputFile>

 -i, --input=<inputFile>   Input file.
 -o, --output=<outputFile> Output file.
 -u, --uncompress          Uncompress input file into output file.
 -e, --extra               Print compression rate, input and output file sizes.

 -h, --help                Show this help message and exit.
 -V, --version             Print version information and exit.

Exemples

Compress a file

$ java Main -i text_file_to_compress.txt -o  compressed_text_file.huff

Uncompress a file

Use -u to activate uncompress mode.

$ java Main -u -i compressed_text_file.huff -o uncompressed_text_file.txt

Print extras

Use -e to print extras : characters (ascii value, frequency, Huffman code) and compression gain.

$ java Main -e -i text_file_to_compress.txt -o  compressed_text_file.huff
$ java Main -ue -i compressed_text_file.huff -o uncompressed_text_file.txt