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<p><b>New page</b></p><div>{{Short description|Program compiler for Java programming language}}<br />
A '''Java compiler''' is a [[compiler]] for the [[Java (programming language)|Java programming language]]. <br />
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Some Java compilers output optimized [[machine code]] for a particular hardware/[[operating system]] combination, called a ''[[Computing platform|domain specific]]'' ''[[computer system]]''. An example would be the now discontinued [[GNU Compiler for Java]].<ref>{{Cite web|title=GCJ - past, present, and future|url=https://lwn.net/Articles/130796/|access-date=2021-09-24|language=en|archive-date=2019-08-02|archive-url=https://web.archive.org/web/20190802072307/https://lwn.net/Articles/130796/|url-status=live}}</ref><br />
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The most common form of output from a Java compiler is [[Java class file]]s containing [[cross-platform]] [[intermediate representation]] (IR), called [[Java bytecode]].<ref>{{Cite web|title=The Java Virtual Machine Specification, Java SE 8 Edition, Section 1.2|url=https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-1.html#jvms-1.2|access-date=2021-09-24|language=en|archive-date=2021-09-24|archive-url=https://web.archive.org/web/20210924135604/https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-1.html#jvms-1.2|url-status=live}}</ref><br />
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The [[Java virtual machine]] (JVM) loads the class files and either [[interpreter (computing)|interprets]] the [[bytecode]] or [[just-in-time compilation|just-in-time]] compiles it to [[machine code]] and then possibly optimizes it using [[dynamic compilation]].<br />
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A standard on how to interact with Java compilers was specified in [[Java Specification Request|JSR]] 199.<ref>{{Cite web|url=https://jcp.org/en/jsr/detail?id=199|title=JSR 199: JavaTM Compiler API|access-date=2021-09-24|archive-date=2021-09-24|archive-url=https://web.archive.org/web/20210924135603/https://jcp.org/en/jsr/detail?id=199|url-status=live}}</ref><br />
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== See also ==<br />
* [[List_of_compilers#Java_compilers|List of Java Compilers]]<br />
* [[javac]], the standard Java compiler in Oracle's [[Java_Development_Kit|JDK]]<br />
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==References==<br />
{{reflist}}<br />
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==External links==<br />
* [http://openjdk.java.net/groups/compiler/ Sun's OpenJDK javac page]<br />
* Stephan Diehl, [http://people.cis.ksu.edu/~hatcliff/605/XC/java-comp.pdf.gz "A Formal Introduction to the Compilation of Java"], ''Software - Practice and Experience'', Vol. '''28'''(3), pages 297-327, March 1998.<br />
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{{DEFAULTSORT:Java Compiler}}<br />
[[Category:Java compilers| ]]<br />
[[Category:Java specification requests]]<br />
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