Duplicate instantiation of singleton

Duplicate instantiation of singleton

References

Reference NO 1

http://stackoverflow.com/questions/15205111/duplicate-instantiation-of-singleton

Reference NO 2

http://stackoverflow.com/questions/3979858/how-to-design-a-singleton-that-can-be-instantiated-only-by-1-class

Reference NO 3

https://www.securecoding.cert.org/confluence/display/java/MSC07-J.+Prevent+multiple+instantiations+of+singleton+objects

Reference NO 4

http://www.javacoffeebreak.com/articles/designpatterns/

Reference NO 5

http://pmd.sourceforge.net/pmd-4.3/rules/design.html

Reference NO 6

http://msdn.microsoft.com/en-us/library/orm-9780596527730-01-05.aspx

Reference NO 7

http://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Singleton

Reference NO 8

http://answers.unity3d.com/questions/21030/component-based-singleton.html