When should I use a LinkedHashMap in Java?

What is a LinkedHashMap and when should I use it?

A LinkedHashMap is a hash table and linked list implementation of the Map interface. You should use it when you need predictable iteration order.

Can you explain the advantages of using LinkedHashMap over HashMap?

Sure! LinkedHashMap maintains the order of insertion, which is useful when you need to iterate in the order elements were added. HashMap does not guarantee any order.

Are there any performance considerations I should be aware of?

Yes, LinkedHashMap has slightly lower performance than HashMap due to the overhead of maintaining the linked list, but it provides order.

In what scenarios would you recommend using LinkedHashMap?

Use LinkedHashMap when you need to maintain insertion order, such as in caching scenarios or when order matters for your application.