Sum all the elements java arraylist

Question

If I had: ArrayList m = new ArrayList(); with the double values ​​inside, how should I do to add up all the ArrayList elements?

Answer 1

Not very hard, just use m.get(i) to get the value from the list.

public double incassoMargherita()
{
    double sum = 0;
    for(int i = 0; i < m.size(); i++)
    {
        sum += m.get(i);
    }
    return sum;
}