• 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

HashMap StackOverflowError problem - please explain me

 
Ranch Hand
Posts: 111
Netbeans IDE Java Linux
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi,

Predict the result !!! and please explain me

HashMap map= new HashMap();
map.put(map,"abdul");

System.out.println(map.get(map));

Regards,

Abdul Mohsin
[ May 18, 2007: Message edited by: Abdul Mohsin ]
 
Ranch Hand
Posts: 1710
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
See the links:
One
Second



Thanks,
 
Abdul Mohsin
Ranch Hand
Posts: 111
Netbeans IDE Java Linux
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi Chandra,

thanks for these links but my question is why the above code is giving StackOverflowError

Regards,

Abdul Mohsin
 
Ranch Hand
Posts: 244
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
The problem is the AbstractMap.hashCode(), which uses the hashCode keys to build it. If the keys contains itself, you have an infinite loop.
 
Abdul Mohsin
Ranch Hand
Posts: 111
Netbeans IDE Java Linux
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi,

I just gone through the AbstractMap java doc ,but still its not clear why its going in infinite loop.

Regards,

Abdul Mohsin
 
Don't get me started about those stupid light bulbs.
reply
    Bookmark Topic Watch Topic
  • New Topic