Regex Expressions in Java

Regex -> Reg + ex i.e. Regular + Expressions

Regex Expressions are a sequence of characters which describe a search pattern. It is generally used for 'find', 'find and replace' as well as 'input validation'.

Most languages either contain regex expressions or contain the ability to create regex expressions such as Perl, Javascript et cetera. This article shall focus on how to write a Regex Expression in Java.

Writing Regex

Let us understand a regular expression with an example to check for a val...