Utility that can search files on hard disk

I want to implement a utility in my application that can search files on the hard disk just like "find files and folsers" option in start menu of windows. What algorithm/techniques and java classes I should use.

What algorithm/techniques and java classes I should use.
You'll need to use recursion and the JDK 1.4.x regular expression package, java.util.regex, for pattern matching. A Java Developer's Journal article located at http://www.sys-con.com/java/article.cfm?id=854 details an implementation of a Java file search utility. Be aware that the article was written three years ago and uses a thrid-party regular expression package but it can certainly guide you in the right direction.

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