What are some examples of collections in Java?
An example of an AI chatbot conversation about collections in Java.
What are some examples of collections in Java?
In Java, collections are used to store groups of objects. Common examples include ArrayList, HashSet, and HashMap.
Can you explain the difference between ArrayList and LinkedList?
Sure! ArrayList is backed by a dynamic array, making it fast for random access, while LinkedList uses a doubly linked list, which is better for insertions and deletions.
What about HashSet? How does it differ from ArrayList?
HashSet is a collection that does not allow duplicate elements and is not ordered, while ArrayList allows duplicates and maintains the order of insertion.
When should I use a HashMap?
Use HashMap when you need to store key-value pairs and require fast retrieval based on keys. It's efficient for lookups.
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