ArrayList, LinkedList

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ArrayList, LinkedList

 ArrayList:

An ArrayList is based on a dynamic array. It allows fast access to elements using index (random access). However, adding or removing elements (especially in the middle) can be slow because it may require shifting elements.

Key Points:

Fast read/access operations (get(index))

Slower insert/delete operations

Uses more memory if resizing is frequent

Good for storing and accessing data

🔗 LinkedList:

A LinkedList is based on a doubly linked list. Each element (node) stores data and pointers to the next and previous nodes. It allows fast insertion and deletion, especially at the beginning or middle, but slower access by index.

Key Points:

Slower read/access operations

Faster insert/delete operations

Uses more memory due to pointers

Ideal for frequently changing data

📊 Main Differences:

Feature ArrayList LinkedList

Access Speed Fast (direct index) Slow (sequential)

Insertion/Removal Slow (needs shifting) Fast (node linking)

Memory Use Less More (extra pointers)

Choose ArrayList for fast access, and LinkedList for frequent insertions or deletions.

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Final Keyword

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