Doubly-linked tester

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

        ObjectList<String> ol = new ObjectList<>();
        ol.insert("coffee");
        ol.insert("butter");
        ol.insert("milk");
        ol.insert("eggs");

        //insert(); tester
        showList(ol);
        //getCurrent(); tester
        Object current = ol.getCurrent();
        System.out.println("Current node: " + current);
        //getLength(); tester
        System.out.println("Length: " + (ol.getLength()));
        //getNext(); tester
        System.out.println("Next node: " + (ol.getNext()));
        //getPrevious(); tester
        System.out.println("Previous node: " + (ol.getPrevious()));
        //remove(); tester
        //ol.remove();
        //showList(ol);

        //getFirst(); tester
        //Object first = ol.getFirst();
        //System.out.println("First item: " + first);
        //getLast(); tester
        //System.out.println("Last item: " + (ol.getLast()));

    }
    public static void showList(ObjectList<String> ol){

        Object [] contents = ol.toArray();
        for (int i = 0 ; i < contents.length; i++){
            System.out.println(contents[i]);
        }
    }
}