I suspect autoboxing won't convert object arrays to native arrays.

Eclipse gives me a compiler error: "The method emit(int[]) in the type
IntArrayList is not applicable for the arguments (Integer[])"

-------------------------------------8<----------------------------
import java.util.ArrayList;

public class IntArrayList {
    public static void main(String[] args) {

        ArrayList<Integer> list = new ArrayList<Integer>();
        list.add(2);
        list.add(1);
        list.add(5);

        // 1. Use Integer[]
        Integer[] intArray = list.toArray(new Integer[0]);
        emit(intArray); // ******** compiler error ********

        // 2. use int[]
        int[] ints = new int[list.size()];
        for (int i = 0; i < ints.length; i++)
            ints[i] = list.get(i);
        emit(ints);

    }

    static void emit(int[] intz) {
        for (int i = 0; i< intz.length; i++)
            System.out.println(intz[i]);
    }
}
-------------------------------------8<----------------------------

Am I missing something?

Eric Sosman a formulé la demande :

Hello,

I followed your suggestion : I used an hybrid system with a custom
IntArray class, without using the ArrayList class, so I have a great
freedom of movement.
Here is the source : http://tinyurl.com/3bwy38

Datas are stored in a private int[] array, but all the useful public
methods are implemented (.contains(int), .add(int) ...). So I don't use
int[] array but a class which wraps an int[] array, like ArrayList I
suppose (?).
I did benchmark tests to compare ArrayList and IntArray/int[], and it's
the same.

Thank you very much for all your answers, and excuse my bad english ;)
Olivier