Editing Java virtual machine (section)

===JVM languages===
{{Main|List of JVM languages}}
A JVM language is any language with functionality that can be expressed in terms of a valid class file which can be hosted by the Java Virtual Machine. A class file contains Java Virtual Machine instructions ([[Java byte code]]) and a symbol table, as well as other ancillary information. The class file format is the hardware- and operating system-independent binary format used to represent compiled classes and interfaces.<ref>{{cite web |url=http://docs.oracle.com/javase/specs/jvms/se7/jvms7.pdf |title=The Java Virtual Machine Specification : Java SE 7 Edition |publisher=Docs.oracle.com |access-date=2015-06-26 |archive-date=2021-02-04 |archive-url=https://web.archive.org/web/20210204093304/https://docs.oracle.com/javase/specs/jvms/se7/jvms7.pdf |url-status=live }}</ref>

There are several JVM languages, both old languages ported to JVM and completely new languages. [[JRuby]] and [[Jython]] are perhaps the most well-known ports of existing languages, i.e. [[Ruby (programming language)|Ruby]] and [[Python (programming language)|Python]] respectively. Of the new languages that have been created from scratch to compile to Java bytecode, [[Clojure]], [[Apache Groovy|Groovy]], [[Scala (programming language)|Scala]] and [[Kotlin (programming language)|Kotlin]] may be the most popular ones. A notable feature with the JVM languages is that they are [[Language interoperability|compatible with each other]], so that, for example, Scala libraries can be used with Java programs and vice versa.<ref>{{cite web |url=http://www.scala-lang.org/old/faq/4 |title=Frequently Asked Questions - Java Interoperability |author=<!--Staff writer(s); no by-line.--> |website=scala-lang.org |access-date=2015-11-18 |archive-date=2020-08-09 |archive-url=https://web.archive.org/web/20200809214018/https://www.scala-lang.org/old/faq/4 |url-status=live }}</ref>

Java 7 JVM implements ''JSR 292: Supporting Dynamically Typed Languages''<ref>{{cite web |url=https://jcp.org/en/jsr/detail?id=292 |title=The Java Community Process(SM) Program - JSRs: Java Specification Requests - detail JSR# 292 |publisher=Jcp.org |access-date=2015-06-26 |archive-date=2020-12-20 |archive-url=https://web.archive.org/web/20201220200733/https://jcp.org/en/jsr/detail?id=292 |url-status=live }}</ref> on the Java Platform, a new feature which supports dynamically typed languages in the JVM. This feature is developed within the [[Da Vinci Machine]] project whose mission is to extend the JVM so that it supports languages other than Java.<ref>{{cite web |url=http://openjdk.java.net/projects/mlvm/ |title=Da Vinci Machine project |publisher=Openjdk.java.net |access-date=2015-06-26 |archive-date=2020-11-11 |archive-url=https://web.archive.org/web/20201111162302/https://openjdk.java.net/projects/mlvm/ |url-status=live }}</ref><ref>{{cite web |url=http://www.oracle.com/technetwork/articles/javase/dyntypelang-142348.html |title=New JDK 7 Feature: Support for Dynamically Typed Languages in the Java Virtual Machine |publisher=Oracle.com |access-date=2015-06-26 |archive-date=2018-09-13 |archive-url=https://web.archive.org/web/20180913101203/http://www.oracle.com/technetwork/articles/javase/dyntypelang-142348.html |url-status=live }}</ref>