How to implement a file processing command line utility in Java, where the tool is titled "fileUtil"

Syntax - input to command line should be:

fileUtil OPTIONS FILE

Where fileUtil is the program name, options are specified transformations, and a file is a .txt file which can be empty or containing a string, ex: "myexamplestring1"

Description

Program should perform basic text transformations on lines of text from an input FILE. Unless the -f option (see below) is specified, the program writes transformed text to a standrd output file (outfile) and errors/usage messages to a standard error file (errfile). The FILE parameter is required and must be the last parameter. OPTIONS may be zero or more of the following and may occur in any order:

• -f
• Edit file in place. The program overwrites the input file with transformed text instead of writing to stdout.
• -d
• Duplicate line numbers to each line, from 1-10.
• -c
• enable a cipher from -25 to 25, shifting each letter from a-z or z-a.
• -r
• Replaces the first instance of string1 in each line with string2.
• -i
• Used with the -r flag ONLY; Applies case insensitive matching -r.
• -o
• Writes the transformed file to a specified output file
• -p <string>
• Adds string as a prefix to each line.

NOTES:

• While the last command-line parameter provided is always treated as the filename, OPTIONS flags can be provided in any order and will be applied as follows:
• Options -f, -i, and -g should be processed first, as they determine global parameters of the computation.
• Options -s, -r, -p, and -n should be processed in this order. That is: (1) file content is first filtered based on the parameter of option -s, if present; (2) replacements are performed based on the parameters of option -r, if present; (3) A prefix will be added after filtering and replacements are done; (4) Line numbering will be applied last.
• Specifying option -i without having specified option -r should result in an error.
• Specifying option -r with specified option -c should result in an error.
• If options are repeated, only their last occurrence is considered.
• Specifying option -r with an empty string1 parameter should result in an error.