Using ListIterator to move back and forth over a LinkedList in Java

Question

I have a LinkedList over which I need to iterate back and forth multiple times. I am using it to keep track of a series of pages in a workflow that will be created dynamically.

Answer 1

Do something like this (pseudocode) --

class SkipIterator extends ListIterator {

    public E previous(){
        E n = super.previous();
        return super.previous();
    }

    ...

}

then:

LinkedList navigationCases;
navigationCases.add("page1");
navigationCases.add("page2");
navigationCases.add("page3");
navigationCases.add("page4");

SkipIterator navigationItr = (SkipIterator)navigationCases.listIterator();
navigationItr.next(); // Returns page1
navigationItr.next(); // Returns page2
navigationItr.previous(); // Returns page1

Cheers