Win a copy of The Java Performance Companion this week in the Performance forum!
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic

Merge array's in java?

 
Reshma Shanbhag
Ranch Hand
Posts: 204
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
HI all,
I am stuck in a situation where i need to merge the contents of two long[].
Heres the example for my requirement

I know the routine way of running for loops to copy the contents from one array to other...
IS THERE ANY OTHER EFFICIENT WAY OF DOING THIS.
Regards
Reshma
 
Carl Trusiak
Sheriff
Posts: 3341
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Believe it or not System has a method to help you with that. arraycopy (Yes, naming convention doesn't follow Sun's standard imagine that :roll: )
:roll:
[ August 27, 2003: Message edited by: Carl Trusiak ]
 
Chris Shepherd
Ranch Hand
Posts: 286
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Check into System.arrayCopy()
You should be able to create a third array with a length equal to the sum of the other two. Then just use this method to place the elements from the first two into the third array.
hth
-EDIT----------------------------
DOH! Carl beat me to it...
---------------------------------
[ August 27, 2003: Message edited by: Chris Shepherd ]
 
Reshma Shanbhag
Ranch Hand
Posts: 204
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi Chris .
Thanks a ton for the help, it was extremely helpful to me. For a while i was in java.util park looking for this functionality :roll:
Reshma
[ August 27, 2003: Message edited by: Reshma Pai ]
 
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic