Introduction - If you have any usage issues, please Google them yourself
Using C++ as the host language to complete: Java language lexical analyzer of the design and implementation of the use of DFA to achieve the design of lexical analyzer the realization of the Notes on the Java source code in the filter the use of two pairs of semi-buffer read from the document the words one by one lexical analysis of flow properties of the word stored in a separate document (file name: scanner_output) in statistical source of the number of words per line and the word number of source files with the report of lexical errors and error location (line number and the source line characters) of the function