java - filtering a stream against items in another list

Question

trying to filter a stream against data within a different list:

It works, but I use a for loop in the middle of the stream. I cannot find any information of how to convert the for loop to a stream.

I could just .stream() the selction.getItems() than .forEach() and have a new .stream() of DATA.accounts, but that is poor code as it would have to restream on every .forEach.

        y=1;

        DATA.accounts.stream()
            .flatMap(estimate -> estimate.getElements().stream())
            .filter( ele-> {

                // different list;
                for (Element element:selection.getItems()){
                    if (element.getId()==ele.getId()){
                        return true;
                    }
                }
                return false;
            })

            .forEach(element -> {
                element.setDateSchedualed(selectedDate);
                element.setOrder(y);    
                y++;
            });

Answer 1

I think what you really need is:

list1.removeAll(list2);

No streams involved though.