How do I implement sets in Java?

How do I implement sets in Java?

You can implement sets in Java using the HashSet, TreeSet, or LinkedHashSet classes. Which one would you like to know more about?

What's the difference between HashSet and TreeSet?

HashSet is unordered and allows null elements, while TreeSet is ordered and does not allow null. Do you need examples?

Yes, please provide an example of using HashSet.

Sure! Here's a simple example:

import java.util.HashSet;

public class Main {
    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 will print the set elements in no particular order.

Thanks! How do I iterate over a HashSet?

You can use an enhanced for loop or an iterator. Here's an example using an enhanced for loop:

for (String fruit : set) {
    System.out.println(fruit);
}