Java New Feature Interview Question 🔥 | Sealed Interface Explained скачать в хорошем качестве

Java New Feature Interview Question 🔥 | Sealed Interface Explained

In this quick Java interview prep Short, learn how sealed interfaces help you restrict which classes can implement an interface. 💡 We start with a simple interface and explore how adding new implementations like CashPayment can cause problems in a shared codebase. Then we introduce the sealed keyword with the permits clause — a feature from Java 17+ — to control the type hierarchy. But here’s the twist! When using sealed interfaces, your implementing classes must be declared as either final, sealed, or non-sealed — or you'll get a compilation error. ❌ And as a bonus, we show you how record works without explicitly declaring final — but why? 🤔 👉 Let me know your answer in the comments! #Java17 #SealedInterface #JavaInterviewQuestions #JavaNewFeatures #JavaShorts #SeleniumExpress