Example of singleton pattern

[raja singh kumar]

Hi All,

Can someone please tell me a real life example of when we would need to go for singleton design pattern?

[German Gonzalez-Morris]

@Service in SpringMVC are singleton by default.

[Zach Rode]

So, to me a singleton has 2 purposes.
1. make sure that an object can only be instantiated 1 so that it has the same state everywhere.
2. Allow a very "heavy" object to be reused and make sure a new one isn't loaded everytime one is needed

theRuntime class is a singleton everyone uses all the time.

be careful though singleton is often considered an anti-pattern due to its overuse and misuse

-Zach