进行了基本的词法分析，能够将所输入程序里的词分出来并可以显示错误的行数-Basic lexical analysis, and points out the word in the input program can display an error number of rows

JAVA实现的统计tf-idf的程序，自写主类调用，提供了的接口，输入的文件应是分好词的文件-JAVA achieve statistical tf-idf program, self-write master class calls, providing file interfaces, input should be divided into many word documents