Saving and loading data to the file is one of the important feature of
many applications which requires the programmer to learn how to read from and
write to the files. The File class in "java.io" package works with
files and directories and it's object represents the name of a file or
directory on the host file system. A program, if the file exists, can examine
the files attributes and perform various operations like renaming, deleting,
reading from and writing to the file.