Granny's Programming Pearls
"inside of every large program is a small program struggling to get out"
JavaRanch.com/granny.jsp
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Liutauras Vilda
  • Jeanne Boyarsky
  • Devaka Cooray
  • Paul Clapham
Sheriffs:
  • Tim Cooke
  • Knute Snortum
  • Bear Bibeault
Saloon Keepers:
  • Ron McLeod
  • Tim Moores
  • Stephan van Hulst
  • Piet Souris
  • Ganesh Patekar
Bartenders:
  • Frits Walraven
  • Carey Brown
  • Tim Holloway

Full detail of Singleton class in java?

 
Greenhorn
Posts: 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I want to know the internals, Syntax and rules for creating singleton class?
 
Marshal
Posts: 24594
55
Eclipse IDE Firefox Browser MySQL Database
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
There aren't any "internals" for a task which may be completed in several different ways. Likewise there isn't any "syntax" for such a task.

As for the rules, the only rule is that at most one instance of a given class may exist at any one time in a certain context. That of course is what "singleton" means.

If you're looking for practical advice, then I'd recommend using an enum with exactly one declared constant.
 
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!