> how do i use this class ?
You cannot, because there is no java.util.arrays class
to use. There's a java.util.Arrays class, which you would
use by (1) reading the Javadoc and (2) writing calls to
the methods it describes.
> how to use api?
The Javadoc for java.util.Arrays lists one hundred
five methods (if I've counted correctly). Which of them
are you having trouble with?

Signature
Eric Sosman
esosman@ieee-dot-org.invalid
>how do i use this class ?
>how to use api?
see http://mindprod.com/jgloss/array.html
the problem is the [] classes do not have an accessible name. So the
word Arrays is used for method for manipulating arrays. Note the
capital A. Classes start with a capital letter.
--
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com