Java - problems iterating through an ArrayList
collections, iterator, java
Solution
That code as quoted won't compile, you're missing a couple of declarations. But I think I get the gist.
`hasNext` tells you that the iterator has a next value, but doesn't take you to it. To do that, you use `next`. So that is an endless loop because you're never calling `next`.
With any recent compiler, you can use the much simpler notation for this:
for (Object book : arrBok) {
// ...do something with 'book' (or just increment your counter)...
}
That iterates through the collection (list, in this case) for you.
Problem
Ok, so I have an `ArrayList (arrBok)`, which is full of `book` objects (the code is in Norwegian, so pay no attention to that please). I want to make a public method which iterates through all the objects in the `ArrayList'. When I execute the code, it just seems to run in an infinite loop, not producing any return values. Here is the relevant (I hope, because there are a couple of other classes involved) part of the code; ``` public String listAll() { itr = arrBok.iterator(); while (itr.hasNext()) { i++; } return "lol"; } ``` This code does nothing useful, but I just want to see if it can iterate through it successfully. What I have tried so far; Tested if the `bokArr (ArrayList)` is empty, which it's not. It has 4 objects inside of it. Return the `toString()` method of the `itr`, with the following result; java.util.AbstractList$Itr@173a10f // <-- not sure if this would be relevant to anything - `return itr.next().toString();` <-- // which seems to return the first object in the array, does that make sense?