performance « iterator « Java Collection Q&A

1. Iterator performance contract (and use on non-collections)    stackoverflow.com

If all that you're doing is a simple one-pass iteration (i.e. only hasNext() and next(), no remove()), are you guaranteed linear time performance and/or amortized constant cost per operation? Is this specified ...

2. Java - When to use Iterators?    stackoverflow.com

I am trying to better understand when I should and should not use Iterators. To me, whenever I have a potentially large amount of data to iterate through, I write ...

3. Best style for iterating through two lists in unison    stackoverflow.com

Here is what I just wrote:

 public void mutate(){
    ListIterator<Double> git = genome.listIterator();
    Iterator<Double> mit = mutationStrategies.iterator();
    while (git.hasNext() && mit.hasNext()){
  ...

4. In Java (1.5 or later), what is the best performing way to fetch an (any) element from a Set?    stackoverflow.com

In the code below, I needed to fetch an element, any element, from toSearch. I was unable to find a useful method on the Set interface definition to return just a ...

5. Seeking further understanding on Iterators in java    stackoverflow.com

If I am using a for loop (the standard for loop, not an enhanced for statement), I fail to see how an iterator increases efficiency when searching through a collection. If ...