• 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 Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

What is exact difference between object and instance

 
Greenhorn
Posts: 5
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi
I want to know exact diff between object and instace
 
Marshal
Posts: 79464
379
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Sounds like a beginner's question.

There isn't a lot of difference, really; they both refer to the same thing.

Any representation of anything in your Java (or other OO) programming is an object; each object derives from a class. When you have an object bar which derives from class Foo, you can say that bar is an instance of [the class] Foo.

That any good?

CR
[ June 14, 2006: Message edited by: Campbell Ritchie ]
 
author
Posts: 14112
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
An instance *of a class* is an object.

An instance of something else isn't an object. For example, in UML a link is an instance of an association. And some people state that Extreme Programming is an instance of the Rational Unified Process. You can also talk of "database instances" etc.

See http://www.google.com/search?q?define:instance
[ June 14, 2006: Message edited by: Ilja Preuss ]
 
Sheriff
Posts: 67749
173
Mac Mac OS X IntelliJ IDE jQuery TypeScript Java iOS
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Moved to Java in General (beginner).
 
Something must be done about this. Let's start by reading this tiny ad:
a bit of art, as a gift, the permaculture playing cards
https://gardener-gift.com
reply
    Bookmark Topic Watch Topic
  • New Topic