Java sealed classes and exhaustive pattern matching
The gist
Blogger Neil Madden argues Java sealed classes are safer inside a component than in a public API.
The catch: adding a subtype can break callers only at runtime, not compile time.
How it unfolded
- Apr 24, 2026Neil Madden publishes a blog post on Java sealed classes and exhaustive pattern matching, noting Java 17 introduced sealed classes that list permitted sub-types.
- Oct 13, 2026A LinkedIn post by Anton S. explains pattern matching for switch expressions in Java, including exhaustiveness checking and support for sealed classes.
- Oct 14, 2026A LockedIn AI blog post on Java interview questions is updated, advising candidates for modern Java roles to know JDK 25, records, sealed classes, pattern matching and virtual threads.