Java
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Why this exists Java changed a lot after version 8. Code written for Java 21 (the version most current services target) looks noticeably different from the tutorials and Stack Overflow answers of ten years ago: fewer…
Modern Java 21: Sealed Types, Record Patterns, Switch Expressions and Optional
The features that make current Java shorter and safer: switch expressions, sealed interfaces with exhaustive switches, record patterns, instanceof patterns and Optional, with the compiler error you get when a case is missing.
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