This week's book giveaways are in the Refactoring and Agile forums.
We're giving away four copies each of Re-engineering Legacy Software and Docker in Action and have the authors on-line!
See this thread and this one for details.
Win a copy of Re-engineering Legacy Software this week in the Refactoring forum
or Docker in Action in the Cloud/Virtualization forum!
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic

ArrayList, contains, objects

 
Manuel Leiria
Ranch Hand
Posts: 171
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi,

I receive an arraylist with several objects like this,



but my arraylist contains equal objects (same name but different quantities and values). What I want to do is create an ArrayList with the distinct objects but summing the quantities and values.

Example
What I have



and I want to create a new ArrayList containing


Can you give some ideias?

thanks in advance,
 
Vijayender Bandaru
Greenhorn
Posts: 21
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Assuming you have all the getX methods in SomeObject

CASE 1:

If you have control over SomeObject and if you can modify it,then the solution is very simple.

1.remove final modifier for all instance varialbles.
2.In the equals method,whenever the object names are equal
add up the current obj values with new object



CASE 2: If you can't modify the SOmeObject class,here is the solution.

 
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic