Execution time for adding element in LinkedList vs ArrayList

Question

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

    LinkedList<Integer> ll = new LinkedList<Integer>();
    ArrayList<Integer> al = new ArrayList<Integer>();

    addElement("LinkedList", ll);
    addElement("ArrayList", al);
}

static void addElement(String type, List listType){
    final long startTime = System.currentTimeMillis();

    for(int i = 0; i<= 1E5; i++){
        listType.add(i);
    }
    final long endTime = System.currentTimeMillis();
    final long timeTaken = endTime - startTime;
    System.out.println("Type:::: "+type+" ::timeTaken:: "+timeTaken);
}  }

Output for above piece of code is ::::

Type:::: LinkedList ::timeTaken:: 11

Type:::: ArrayList ::timeTaken:: 18

Now if I interchange the call for addElement method then I get the following output::::

Type:::: ArrayList ::timeTaken:: 10

Type:::: LinkedList ::timeTaken:: 16

I fail to understand why the sequence to add integer to a LinkedList and ArrayList change the execution time of the method. I tried the same for removing the elements and the results were OK. Could anyone please help me get to know as why this might be happening only while adding elements...