• 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
  • Liutauras Vilda
  • Paul Clapham
Sheriffs:
  • paul wheaton
  • Tim Cooke
  • Henry Wong
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Piet Souris
Bartenders:
  • Mike London

Serialization

 
Ranch Hand
Posts: 144
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 guys...
please check my comment below line 20
shouldn't we get NullPointerException, since theCollar has not been initialized yet???
 
Ranch Hand
Posts: 185
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
The serialisation of the Dog object starts here:

os.writeObject(d);

The Collar object contained in this object was created and passed to the Dog constructor:



getCollarSize() is invoked on that Collar object:



So the Collar object was created on line 37 and everything should be fine, I think.

John
 
Hama Kamal
Ranch Hand
Posts: 144
Netbeans IDE Java Linux
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
well John, and on which object the private methods get called ? on the Dog object ?
 
Ranch Hand
Posts: 206
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Serialization is not on the Exam, but it's good to learn and know about it.

Check out my responses on earlier post here to gain better understanding about Serialization.


https://coderanch.com/t/539469/java-programmer-SCJP/certification/Serialization

Hope it help...
 
Hama Kamal
Ranch Hand
Posts: 144
Netbeans IDE Java Linux
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thansk Tommy, but are you sure that it is not on the exam?
 
Tommy Delson
Ranch Hand
Posts: 206
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Confirmed by Bert Bates, and you can confirm it by yourself by visit Oracle website under OCPJP's objectives. There is no Serialization objective on the exam.

 
Hama Kamal
Ranch Hand
Posts: 144
Netbeans IDE Java Linux
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Many thanks Tommy
 
Don't get me started about those stupid light bulbs.
reply
    Bookmark Topic Watch Topic
  • New Topic