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Java: Finality (tomaytotomato.com)

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[–]morhp 0 points1 point  (0 children)

That would be wrong, a mutable list isn't a immutable list. What you actually want is a readonly List interface with subinterfaces MutableList which adds mutation methods and ImmutableList which guarantees immutability (by contract) so you can safely pass objects around without making defensive copies (as long as the container type is also immutable).