#java-17

2 post(s)

Sealed Classes + Pattern Switch:Exhaustive Code Without `instanceof` Soup

What sealed classes are (JEP 409 / Java 17), how pattern switch and record patterns finish the story on Java 21, and how to replace cascading instanceof with compiler-checked exhaustiveness.

Java

Java Records:Immutable Data Without the Boilerplate

What Java records are, when they shipped (JEP 395 / Java 16), the problem they solve, and practical use cases with code—from DTOs to sealed-pattern matching.