A regular expression is a pattern which may match a string.
In this example the pattern (land|stan) matches
land or stan. So Afghanistan and Finland match
but Albania does not match.
1. [ VB ] Regular Expressions
1. [ Python ] Regular Expressions
1. [ C++ ] Regular Expressions
1. [ Java ] Regular Expressions
The match in Java must include the whole string. For that reason
you must include .* at the beginning and .* at the end if your
pattern is allowed to occur in the middle of the string.
test text
1. [ C# ] Regular Expressions
1. [ Perl ] Regular Expressions
1. [ Ruby ] Regular Expressions