When should I use LinkedHashSet in Java?

What is a LinkedHashSet and when should I use it?

A LinkedHashSet is a collection that maintains a linked list of the entries in the set, preserving the order of insertion. You should use it when you need a set that maintains the order of elements and allows for fast access.

What are the advantages of using LinkedHashSet over HashSet?

The main advantages are that LinkedHashSet maintains the insertion order and allows for predictable iteration, while HashSet does not.

Can you give me an example of when to use LinkedHashSet?

Sure! Use LinkedHashSet when you want to store unique items in a specific order, like maintaining a playlist of songs where the order matters.

Are there any performance considerations I should be aware of?

Yes, LinkedHashSet has slightly higher overhead than HashSet due to maintaining the linked list, but it provides better iteration performance.