Java语言词法分析器的设计和实现

其中具体要求：

使用DFA实现词法分析器的设计；

实现对Java源程序中注释的过滤；

利用两对半缓冲区从文件中逐一读取单词；

词法分析结果属性字流存放在独立文件(文件名：scanner_output)中；

统计源程序每行单词的个数和整个源文件单词个数；

具有报告词法错误和出错位置（源程序行号和该行字符）的功能；-Java language lexical analyzer design and implementation of which specific requirements: Use DFA lexical analyzer designed to achieve　realization of Java source code annotations filter　use two pairs of semi-buffer read the words from the file one by one　lexical analysis of property word stream is stored in a separate file (file name: scanner_output) in　number of words per line source statistics and the number of words in the entire source file　has reported lexical error and error location (source code line number and the line of characters) function