Regular Expressions

I guess Regular Expressions can be the most powerful and most underappreciated tool if you dont know about it. I really recommend to spend some time reading about its powerful functionality. It is not easy to digest either, but in small servings of syntax and hands-on practice you have almost a golden hammer for dealing (searching, editing,manipulating) with strings and data.

Sample: .+@.+\.[a-z]+
Match any email address like name@domain.com

There is a handy Netbeans plugin to play with your patterns and matches right in your favorite IDE.
RegExPlugin (link)

About Regular Expressions on Wikipedia (link)
Sun Java Tutorial (link)

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