• 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
  • Liutauras Vilda
  • Tim Cooke
  • Jeanne Boyarsky
  • Paul Clapham
Sheriffs:
  • Devaka Cooray
  • Ron McLeod
  • paul wheaton
Saloon Keepers:
  • Tim Moores
  • Piet Souris
  • Tim Holloway
  • Stephan van Hulst
  • Carey Brown
Bartenders:
  • Al Hobbs
  • Frits Walraven
  • Scott Selikoff

garbage collection

 
Ranch Hand
Posts: 103
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi all,
I was reading through the Sun tutorials, and it does say that if all the references to an object are set to null, then the object is eleble for garbage collection. But the following confuses me. Its Question #2, and my question is this, if point is set to null, does that not mean that the object that point refers to is now eligible for garbage collection?
 
Ranch Hand
Posts: 265
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
No, because the Rectangle still holds a reference to the Point object. If the rectangle reference was also set to null, both objects would become eligible for gc.
 
Ranch Hand
Posts: 7729
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Chad's correct, you must examine the Rectangle class' code. You can see that the reference to the Point instance passed as a parameter is stored in the instance variable origin. So the Rectangle instance holds on to the Point instance preventing it from becoming eligible for garbage collection.
 
Shashank Gokhale
Ranch Hand
Posts: 103
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Oh yes,
Thanks I see it. I guess I didnt follow the program too closely. My bad
 
Straws are for suckers. Now suck on this tiny ad!
the value of filler advertising in 2021
https://coderanch.com/t/730886/filler-advertising
reply
    Bookmark Topic Watch Topic
  • New Topic