Counting arguments in the command line

I need to write a snip of code that will check the command line to make sure there are 5, no more or less, arguments. If not I have to return an error message. Anyone have any ideas?
Stephen

The command line args will be in a String[] passed to main(). Arrays have a length field that tells you how many elements they have.
http://java.sun.com/docs/books/tutorial/java/nutsandbolts/arrays.html

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