mainapp

package linkedlist;

public class MainApp {

    public static void main(String[] args) {
        String e1 = new String("a");
        String e2 = new String("m");
        String e3 = new String("g");
        String e4 = new String("d");
        String e5 = new String("j");

        // ----------------SINGLE LIST--------------------------
        SortedLinkedList list = new SortedLinkedList();

        list.addElement(e1); // gives null pointer exception
        list.addElement(e2);
        list.addElement(e3);
        list.addElement(e4);
        list.addElement(e5);

        System.out.println("number in the list via count method: " + list.countElements());
        System.out.println("number in the list via countRecursive method: " + list.countElementsRecursive());

        list.removeLast();
        list.udskrivElements();

        System.out.println(
                "an element has been removed via removeLast, should now give one less: " + list.countElements());

        list.removeElement(e3);

        System.out.println("should print e1: " + e1.toString());
        System.out.println("should print e2: " + e2.toString());
        System.out.println("should print e3: " + e3.toString());
        System.out.println("should print e4: " + e4.toString());
        System.out.println("should print e5: " + e5.toString());
        System.out.println(
                "an element has been removed via removeElement, should now give one less: " + list.countElements());

        // ----------------DOUBLE LIST-----------------------

        SortedLinkedListDouble listDouble = new SortedLinkedListDouble();

        listDouble.addElement(e1);
        listDouble.addElement(e2);
        listDouble.addElement(e3);
        listDouble.addElement(e4);
        listDouble.addElement(e5);

        System.out.println("number in the list via count method: " + listDouble.countElements());

        listDouble.removeLast(); // returns null
        listDouble.udskrivElements(); // returns null

        System.out.println(
                "an element has been removed via removeLast, should now give one less: " + listDouble.countElements());

        listDouble.removeElement(e3); // gives null pointer exception

        System.out.println("should print e2: " + e2.toString());

        System.out.println("an element has been removed via removeElement, should now give one less: "
                + listDouble.countElements());
    }
}