Is there a way to convert a ArrayList of Longs to a long array (long[])

[Eugenio Flores]

Hello, I wouldn't like to iterate through a List of Longs to get the corresponding primitive array.

Is there a JSE API to get the a primitive array?

I'm asking here because in my project, my search method returns a long[]

Thanks in advance.

[Piotr Nowicki]

I would also like to know if there is a clean way to do that... Right now I'm using very basic way of iterating through the list and adding elements to the array...

[Roberto Perillo]

How about this piece of code:

Long [] array = new Long [1];
array[0] = new Long(8);
List<Long> list = Arrays.asList(array);

[Sean Clark]

Hey,

I'm not sure there is a way to return a primitive array, I know that as of 1.5 List has a method to returning an array using generics, so something like this:

List<Long> list = new ArrayList<Long>();
Long[] longArray = list.toArray(new Long[0]);

but only works with Objects and not primitives.

You may just have to loop through and add to an array.

Sean

[Roberto Perillo]

Just now I read carefully the title of this thread... so Sean's code is correct, my code does the opposite of what's being asked.

[Eugenio Flores]

Thanks for the answer, I believe I would have to iterate...

Thanks again.

[Roel De Nijs]

I think everybody wants such a method for the implementation of the find-method I didn't find one (and I'm pretty sure it does not exist in the JDK), so a simple iteration will do.