FTP
...\FTPClient
...\.........\Bryan.txt
...\.........\file1.txt
...\.........\file2.txt
...\.........\FTPClient.class
...\.........\FTPClient.java
...\.........\Kevin.txt
...\.........\transferfileClient.class
...\FTPServer
...\.........\Bryan.txt
...\.........\file1.txt
...\.........\file2.txt
...\.........\FTPServer.class
...\.........\FTPServer.java
...\.........\Kevin.txt
...\.........\transferfile.class