多媒体类别，包含Huffman编码、lzw编码和算数编码三种，对“I have a dream”进行编码-Including Huffman Coding、lzw coding and Arithmetic coding

本程序是上课学习所用，实现的是多媒体中的算数编码，用java实现，并可运行于eclipse-This procedure is used in class to learn, to achieve the multimedia arithmetic coding to achieve with java, and can run on eclipse