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Changing an arrays size

Ryan Perlman

Joined: Oct 31, 2001
Posts: 23
I am trying to change the arrays size if some condition is not met.
my user will input 20 numbers between 10 and 100 if one is a duplicate of the other don't add it to the array. here is the code I have. It won't add the duplicate number but it sets that array to zero instead I just want to eliminate that
The code

ANY help is appreciated Ryan

[This message has been edited by Ryan Perlman (edited November 15, 2001).]
William Barnes
Ranch Hand

Joined: Mar 16, 2001
Posts: 986

You need a more flexable data structure, arrays are rather static. (Sorry I didn't actaully look at your code.)

Please ignore post, I have no idea what I am talking about.
David O'Meara

Joined: Mar 06, 2001
Posts: 13459

You'd have to ask the question in the Performance forum as to whether it is a good thing, but previously I have used the System.arraycopy() method. I tend to use the Collections framework rather than arrays (except on the rare occasion) so it's been a while.
Colin Kenworthy
Ranch Hand

Joined: Aug 06, 2001
Posts: 88
Once you create an array it's size cannot be changed. You could (once your 20 numbers have been input) go through your array counting the non-zero ints and create a new array of that size, then go through again copying accross the non-zero ints.
OR you could get into Collections (in which case you would need to use the Integer class instead of int) and discover how simple it is to manipulate a set of objects like Integer.
I agree. Here's the link:
subject: Changing an arrays size
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