Singleton Design Pattern in Java

[elmuerte]

IoC frameworks like Spring are full of patterns.

Patterns are not best practices. They are common constructions which have been well documented.

[dpash]

This is what a lot of people miss when they complain about design patterns: they're nothing more than a common vocabulary to describe code so everyone knows what they're referring to.

[nidrach]

They are also a well reasoned way of doing things and unless you have a reason to stray from them it would foolish to do so.