Switches, FlaggedOptions, and QualifiedSwitches all require flags. Flags can be short, consisting of a single character and preceded by a single hyphen, or long, consisting of more than one character and preceded by two hyphens. Switches, FlaggedOptions, and QualifiedSwitches may use short flags, long flags, or both.

In general, your program's most commonly used options should have short flags. Long flags are generally more appropriate for less-frequently used options.

In order to configure a parameter with no short flag, specify a short flag equal to JSAP.NO_SHORTFLAG. In order to configure a parameter with no long flag, specify a long flag equal to JSAP.NO_LONGFLAG.