The Java Collection framework gives us two major ways to organize elements: List (ordered, allows duplicates) and Set (unique, no duplicates).
List
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Nature: Ordered sequence, index-based
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Duplicates: Allowed
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Analogy: To-do list, where you may repeat tasks
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Common Usage: When insertion order and position access matter
Set
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Nature: Unordered, no guaranteed indexing
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Duplicates: Not allowed
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Analogy: A bag of unique items, like distinct voter IDs
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Common Usage: When uniqueness is more important than order
Methods in List and Set
Working with Lists in Java
When to use Lists or Arrays
When to use Sets and List
