Implement an Iterator

[sehudson]

I need some help with a programming assignment. I have to use an array list and an integer field to implement an iterator(with hasNext() and next()) etc.

[sunde887]

What are you having trouble with? What have you tried?

[sehudson]

i dont understand what it is asking for exactly. I know what an iterator is, but not sure how I could implement one.


So, if I had a list L, that I wanted to iterate over

int i=0;
List L = new List();
L.add("1");
L.add("2");

Iterator itr = L.iterator();

while(itr.hasNext()){
Object nextItem = itr.next();
**Do Processing Here on the listItem**
i++;
}

Then at this point, I would use i to represent the number of elements in my list?? I'm supposed to use some pseudo code.

[sunde887]

that looks pretty good, try putting a print statement after the loop to print the final value of i to see if it counted the items in the list.

[sehudson]

I cant implement a List since its abstract(forgot) so I set:

List L = new LinkedList();

put in the println and it indeed works.

[sunde887]

If you solved it please mark your thread solved with the thread tools. If you have more questions feel free to ask.