Jug dynamic languages_in_jvm
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The document discusses alternative programming languages that can be used on the Java Virtual Machine (JVM) besides Java. It outlines some limitations of Java and reasons for considering other options. Several dynamic and functional languages that run on the JVM are described, including Groovy, JRuby, Scala, and JavaScript via Rhino. The document recommends trying Groovy first due to its easy integration with Java and availability of frameworks. It emphasizes that using other JVM languages does not require replacing Java entirely and encourages giving them a try without dropping Java.
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Jug dynamic languages_in_jvm
- 1. Alternative Languages on JVM Java User Group Latvia www.jug.lv
- 2. Agenda Why alternative languages? What are the options? How to use them? Meet today's leaders JRuby Groovy Scala Summary
- 3. Why Go Alternative? Java is stagnating Syntax Complex language - generics example? Technical limitations Ugly API JDK 7/8 is being delayed We want power now!!!
- 4. Why Go Alternative? Generics Primitives Arrays Date API I/O API No closures
- 5. Why Go Alternative? Cool frameworks and libraries Embedded scripting Less code Simple code
- 6. Where To Go? Dynamic Languages JRuby Jython Groovy Rhino (JavaScript) Functional Languages Clojure Scala
- 7. Groovy Easiest to learn Direct invocation of Java methods Compilable Java only Grails, Gradle, Gant, Griffon, GPars, ... Markup builder example...
- 8. JRuby Different from Java Intuitive syntax Several implementations (Native, IronRuby, ...) Compilable Rails, Rake, Ruby Gems, ... Active Record example
- 9. Scala Functional and object-oriented Concurrency Academic Java only Lift Prime numbers example ...
- 10. How it works? Interpreted JDK 6 JSR 223 (javax.script) (Example) Apache Bean Scripting Framework (BSF) Custom script runners Compilation into bytecode Best performance
- 11. What about existing code? Calls to Java Calls from Java Class extensions (example) Hybrid systems
- 12. JVM and Java Language JVM and Java are not the same thing Java used with no JVM (Android, GWT) JVM used with no Java (JVM languages)
- 13. Summary One language is not enough No changes to infrastructure Don't treat Java as a hammer No need to drop Java Simply try it !
- 14. Where to Start? Try Groovy Easiest Java integration Compilation into bytecode Lots of frameworks
- 15. Time for discussion Tell us what do you think
- 16. References http://jruby.org/ http://groovy.codehaus.org/ http://www.scala-lang.org/ http://jakarta.apache.org/bsf/ http://jcp.org/en/jsr/detail?id=223
- 17. Who am I? Dmitry Buzdin Agile software developer working with Java since 2005 Based in C.T.Co Reach me at [email_address]