What is a LinkedHashSet in Java?

Can you explain what a LinkedHashSet is in Java?

Sure! A LinkedHashSet is a collection that maintains a linked list of the entries in the set, preserving the order of insertion.

How does it differ from a HashSet?

The main difference is that a HashSet does not maintain any order, while a LinkedHashSet maintains the order of elements as they were added.

Are there any performance implications when using LinkedHashSet?

Yes, LinkedHashSet has slightly lower performance than HashSet due to the overhead of maintaining the linked list, but it provides predictable iteration order.

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

Certainly! Here's a simple example:

import java.util.LinkedHashSet;

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

This will print the elements in the order they were added.