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Interfaces vs Implementations

Discussions center on distinguishing programming interfaces from concrete implementations, their benefits, tradeoffs, and usage in languages like Java, Go, Julia, and Python.

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pjmlp (36) masklinn (26) int_19h (21) layer8 (21) dragonwriter (19)

Keywords

PEP UnsupportedOperationException ISP LSP OOP SRP IDE URL i.e FooImpl interfaces interface java implementation type compile time lsp method compile objects

Sample Comments

regularfry • Jun 16, 2016 • View on HN

You're confusing interface with implementation.

kristoff_it • Nov 10, 2024 • View on HN

There are a few different ways of implementing interfaces, each with different tradeoffs, so it's not boilerplate :^)

ithkuil • Jul 3, 2020 • View on HN

Can you make an example of how it would be confused with interfaces in weird ways?

skj • Jul 6, 2014 • View on HN

The stuff you mix in has code. Interfaces do not.

tpoacher • Jan 12, 2025 • View on HN

you don't like java interfaces?

k__ • Feb 1, 2020 • View on HN

It's like saying interfaces are classes without implementation.

ThePhysicist • May 2, 2023 • View on HN

See above, interfaces won't solve that problem unfortunately.

dionian • May 26, 2022 • View on HN

wrong. if your implementation is simple enough you dont need the interface.

phil_kahrl • Jun 20, 2022 • View on HN

Programming to interfaces not implentation is at least encouraged if not outright enforced.

dyarosla • Mar 17, 2018 • View on HN

You’ve described interfaces, not so much inheritance.