• 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
  • Tim Cooke
  • Devaka Cooray
  • Ron McLeod
  • Jeanne Boyarsky
Sheriffs:
  • Liutauras Vilda
  • paul wheaton
  • Junilu Lacar
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Piet Souris
  • Carey Brown
  • Tim Holloway
Bartenders:
  • Martijn Verburg
  • Frits Walraven
  • Himai Minh

Upper bound wildcard in Java Generics

 
Ranch Hand
Posts: 77
Android MyEclipse IDE Chrome
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator


Why last two line doesn't compile? Especially the last line. I've been doing quite a bit test on this topic but still couldn't catch the logic.

Thanks.
 
Greenhorn
Posts: 16
Java
  • Likes 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi Damodar,

As per your ArrayList reference generic declaration, You can only add actual IOException (Because of ? super) or the objects which extends IOException in to the list.

ClassCaseException and Exception are not derived from IOException, so it fails.

Thanks,
Rajasekar.
 
damodar kumar
Ranch Hand
Posts: 77
Android MyEclipse IDE Chrome
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thanks lot Rajasekar Krishnan
 
Never trust an airline that limits their passengers to one carry on iguana. Put this tiny ad in your shoe:
the value of filler advertising in 2021
https://coderanch.com/t/730886/filler-advertising
reply
    Bookmark Topic Watch Topic
  • New Topic