What are the differences between HashSet and TreeSet iterators?

Can you explain the differences between HashSet and TreeSet iterators?

Sure! HashSet iterators are unordered and provide no guarantees on the order of elements, while TreeSet iterators are ordered and return elements in their natural order.

What about performance differences when iterating?

HashSet iterators generally have faster performance for iteration due to their underlying hash table structure, while TreeSet iterators may be slower because they maintain a sorted order.

Are there any specific use cases for each?

Yes! Use HashSet when you need fast access and don't care about order. Use TreeSet when you need sorted elements or need to perform range queries.

Can you give an example of how to use both in code?

Certainly! Here's a simple example:

HashSet<String> hashSet = new HashSet<>();
TreeSet<String> treeSet = new TreeSet<>();

hashSet.add("apple");
treeSet.add("banana");

for (String item : hashSet) {
    System.out.println(item);
}

for (String item : treeSet) {
    System.out.println(item);
}

This code demonstrates adding elements and iterating through both sets.