Java Sealed Classes Explained In - Latest Information & Updates 2026

Web Reference: Dec 11, 2025 · In this article, we explored sealed classes and interfaces, a new feature in Java SE 17. We covered the creation and usage of sealed classes and interfaces, as well as their constraints and compatibility with other language features. Apr 28, 2025 · This means that only the classes designated by the programmer can inherit from that particular class, thereby restricting access to it. when a class is declared sealed, the programmer must specify the list of classes that can inherit it. Sealed classes and interfaces restrict which other classes or interfaces may extend or implement them. For background information about sealed classes and interfaces, see JEP 409.

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