Clean Application Development with Records, Sealed Classes and Pattern Matching
summary
Shows Java 17/18 features with live code: demonstrates text blocks for multi-line strings, builds a Range record with canonical constructor and validation, and proves records stop deserialization from creating invalid instances — records prevent deserialization bypass. Refactors a CSV city pipeline by replacing String/Integer with State and Population records (small cost, clearer types), adds a custom collector, and uses pattern matching for switch plus sealed interfaces so the compiler enforces exhaustive cases.
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chapters (6)
- 0:00Introduction
- 3:28Text blocks in Java 17
- 12:37Understanding Java records
- 25:37Serialization and security
- 30:43Improving code readability
- 50:31Pattern matching and sealed types
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