copying contents of an ArrayList to another ArrayList

**ankit1801** · 03-27-2011, 05:20 AM

i need to copy contents of an arraylist arr1 in another new arraylist arr2. how to copy the contents?

**camickr** · 03-27-2011, 05:31 AM

Have you read the ArrayList API? What constructors or methods do you think might be helpful?

**nap_patague** · 03-27-2011, 05:33 AM

you can try to loop the contents of array to and then copy the contents to the array 2

**pbrockway2** · 03-27-2011, 05:34 AM

(hint: an ArrayList is a Collection)

**pbrockway2** · 03-27-2011, 05:37 AM

Originally Posted by nap_patague

you can try to loop the contents of array to and then copy the contents to the array 2

Why is that better than using the constructors and methods provided by ArrayList?

**DarrylBurke** · 03-27-2011, 05:48 AM

Originally Posted by pbrockway2

(hint: an ArrayList is a Collection)

I remember you telling me that when I was too new to know it </nostalgia>

**nap_patague** · 03-27-2011, 05:54 AM

it is just my suggestion. or he can may be use to just initiate it on another arraylist

newArrayList = oldArrayList

**pbrockway2** · 03-27-2011, 06:04 AM

Originally Posted by Darryl.Burke

I remember you telling me that when I was too new to know it </nostalgia>

And I remember camickr telling me that text components have a read() method that is better the ugly, slow, memory exhausting line by line code I had!

**pbrockway2** · 03-27-2011, 06:07 AM

Originally Posted by nap_patague

it is just my suggestion.

And it's a perfectly workable suggestion. It's just that I can't see why anyone would make it, or follow it given what camickr had previously posted.

or he can may be use to just initiate it on another arraylist
newArrayList = oldArrayList

The OP wanted to copy the contents of the list.

Thread: copying contents of an ArrayList to another ArrayList