How to declare a match pattern in Java? [closed]

How to declare a match pattern in Java? [closed]

References

Reference NO 1

http://stackoverflow.com/questions/15197136/how-to-declare-a-match-pattern-in-java

Reference NO 2

http://docs.oracle.com/javase/tutorial/essential/regex/

Reference NO 3

http://perldoc.perl.org/perlre.html

Reference NO 4

http://php.net/manual/en/function.preg-match-all.php

Reference NO 5

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions

Reference NO 6

http://www.jessrules.com/docs/71/rules.html

Reference NO 7

http://www.regular-expressions.info/optional.html

Reference NO 8

http://www.w3schools.com/jsref/jsref_obj_regexp.asp