expressive-java
Modern Java - A Guide to Java 8
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| expressive-java | Modern Java - A Guide to Java 8 | |
|---|---|---|
| 6 | 2 | |
| 14 | 16,630 | |
| - | - | |
| 0.0 | 2.7 | |
| almost 2 years ago | 9 months ago | |
| Java | Java | |
| - | MIT License |
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expressive-java
- Deconstructing Records in Pattern Matching - Inside Java Newscast #26
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ExpressiveJava: Re-implementing a simple Scala interpreter in JDK 8/15/17. JDK 17 code nearly identical with use of Records + Pattern Matching + Sealed Types.
With JDK17 and the introduction of Record types, sealed classes/interfaces, and pattern-matching the implementation can come close to ver-batim mirroring the Scala 2 one: - Scala: https://www.scala-lang.org/old/node/56.html - JDK 17 Java: https://github.com/Randgalt/expressive-java/blob/master/java-17/src/main/java/examples/SimpleInterpreter.java
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ExpressiveJava: Rewriting simple Scala interpreter – JDK17 code nearly identical
I wanted to share this little project I found. The author has been writing Java re-implementations of the same Scala interpreter over the years as newer JDK versions & features are released.
With JDK17 and the introduction of Record types, sealed classes/interfaces, and pattern-matching the implementation can come close to ver-batim mirroring the Scala 2 one:
https://github.com/Randgalt/expressive-java/blob/master/java...
Unfortunately, the Scala org website is down right now, so the original code can be viewed here for the moment:
https://web.archive.org/web/20200103022853/https://www.scala...
(Or also in the repo: https://github.com/Randgalt/expressive-java/blob/master/scal...)
The final feature that is needed to really seal the deal, is part of JEP 405 for destructuring + binding to values in patterns ("Deconstruction patterns"):
https://github.com/Randgalt/expressive-java/issues/3
https://openjdk.java.net/jeps/405
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Why Co–Star Uses Haskell
using records and ADTs (sealed types) with pattern match "switch" and the net result is an almost verbatim translation.
https://github.com/Randgalt/expressive-java/issues/1
There is one ugly line which JDK18 will fix, "destructuring in pattern captures/match".
Modern Java - A Guide to Java 8
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Java 20 / JDK 20: General Availability
Here are some resources I've found helpful and have read or are on my backlog to catch up with these developments:
- https://github.com/wesleyegberto/java-new-features (terse, includes links to JEPs, good jumping off point)
- https://github.com/winterbe/java8-tutorial (quick tour through features of Java 8)
- https://winterbe.com/posts/2018/09/24/java-11-tutorial/ (same for Java 11)
Books:
- Java 8 in Action / Modern Java in Action (Raoul-Gabriel Urma, Alan Mycroft, Mario Fusco; 2014 and 2018 respectively)
- The Well-Grounded Java Developer (Martijn Verburg, Benjamin Evans, Jason Clark; 2022) - not specifically focused on new features but does cover them in the context of going deeper into Java and the JVM.
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Coming from .net to java
Otherwise, learning Maven has been really important. As for learning the language, I liked Winterbe's guides. Here's one. https://github.com/winterbe/java8-tutorial