Can you show me some examples of HashSet implementations?

Can you show me some examples of HashSet implementations?

Sure! A HashSet is a collection that contains no duplicate elements and is used to store unique items. Would you like to see examples in Java or Python?

Let's see an example in Java.

Here's a simple example in Java:

import java.util.HashSet;

public class HashSetExample {
    public static void main(String[] args) {
        HashSet<String> set = new HashSet<>();
        set.add("Apple");
        set.add("Banana");
        set.add("Orange");
        System.out.println(set);
    }
}

This code creates a HashSet and adds three fruit names to it.

What happens if I try to add a duplicate item?

If you try to add a duplicate item, the HashSet will ignore it. For example, if you add "Apple" again, it won't be added a second time.