What is the point of closing a class object?

Question

If java has garbage collector, why do so many codes close the scanner class object after using it? :( ~bear with a noob here.

Answer 1

See
http://stackoverflow.com/questions/5919143/is-it-safe-not-to-close-a-java-scanner-provided-i-close-the-underlying-readable

Answer 2

thanks :)