What are some examples of Java Collections Framework?
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What are some examples of the Java Collections Framework?
The Java Collections Framework includes several interfaces and classes. For example, ArrayList, HashSet, and HashMap are commonly used.
Can you explain the difference between ArrayList and LinkedList?
Sure! ArrayList is backed by a dynamic array, which allows for fast random access, while LinkedList is a doubly-linked list, which is better for frequent insertions and deletions.
When should I use HashMap over TreeMap?
Use HashMap for faster access and insertion (O(1) on average), while TreeMap is useful when you need sorted order (O(log n) for operations).
What are some common use cases for using Sets?
Sets are great for storing unique elements, such as when you need to eliminate duplicates from a list or when you want to perform set operations like union and intersection.
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