What types of collection data structures have you used in your experience?

In my experience, I have used the following types of collections:

• Lists (e.g., ArrayList) for ordered storage of elements.
• Sets (e.g., HashSet) for storing unique elements.
• Queues (e.g., LinkedList) for FIFO processing.
• Maps (e.g., HashMap) for key-value pairs.

In automation testing, collections help store test data, results, parameters, etc.