What is a LinkedHashSet and how do I use it?

Can you explain what a LinkedHashSet is in Java?

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

How is it different from a HashSet?

Unlike HashSet, LinkedHashSet maintains the order of elements, allowing for predictable iteration.

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

Sure! 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");

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

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

What are the advantages of using a LinkedHashSet?

The main advantages are that it maintains insertion order and provides constant time performance for basic operations like add, remove, and contains.