JSAP not only syntactically validates your program's command line
arguments, but it converts those arguments into objects you specify. If you
tell JSAP that one of your parameters is an Integer, for example, and the
user does not provide a String that can be converted to an Integer when
invoking the program, JSAP will throw a ParseException when you have it
parse the command line. If no exception is thrown, you are guaranteed an
Integer when you request that parameter's value from your program. There's
a pretty big (and growing) list of return types supported by JSAP, including
Integers, Floats, Dates, URLs, and even java.awt.Colors; you can also add
your own in a matter of minutes.
