Sometimes it's useful to read data that is from a file, rather than from the standard input, and write the result to another file instead of printing it to the console. Add this functionality to your program along with the appropriate command-line argument support.
Update command-line arguments parsing to support the -inputFile and -outputFile arguments.
If -inputFile is provided followed by the file name, read the input data from the file.
If -outputFile is provided followed by the file name, output only the error messages to the console and print the results to the file.
java SortingTool -sortingType byCount -inputFile input.txt
java SortingTool -sortingType byCount -inputFile data.dat -outputFile out.txt