说明：  该文件包括一个代码文件DFM.java，该程序为一个基于命令台的文件管理器，本代码实现建立文件目录及文件，拷贝文件、删除文件，显示文件列表，每项功能都做了异常处理，该程序为我一课程设计的题目，主要用于学习java的基本特性，仅供参考，如果不足还请见谅
(The document includes a code document DFM.java, the program as a command-based document management platform, and realize the code to create the document directories and files, copy files, delete files, display the list of files for each function to do the exception handling, The program curriculum design one for my topic, mainly for studying the basic characteristics of java for reference purposes only and do apologize if the lack of further)