Question

I am loading objects in an Java ArrayList from a SQL Query with an ORDER BY clause.

(1) Can I access that ArrayList with a foreach loop and get them back in
the order in which they were loaded?

(2) Similarly, can I consistently get the elements in the same SQL order by using get(n)? I.e. if the 3rd element in the SQL rowset was “x”, will get(2) always retrieve that?

Answer 1

Can I access that ArrayList with a foreach loop and get them back in the order in which they were loaded?

Yes, List’s are ordered collection .

Similarly, can I consistently get the elements in the same SQL order by using get(n)? I.e. if the 3rd element in the SQL rowset was "x", will get(2) always retrieve that?

Yes , As i said they are ordered , in the order they are inserted they can be retrieved in the same order.

List<String> ls=new ArrayList<String>();
        ls.add("A");
        ls.add("B");
        ls.add("C");

        for(String s:ls)
            System.out.println(s);

        System.out.println(ls.get(1));

Results:

A
B
C
B