Java compiler: Difference between revisions

Revision as of 11:22, 5 June 2009

Revision as of 18:06, 13 August 2009

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A '''Java compiler''' is a [[compiler]] for the [[Java (programming language)|Java programming language]]. The most common form of output from a Java compiler are [[Class (file format)|Java class files]] containing platform-neutral [[Java bytecode]]. There exist also compilers emitting optimized [[Machine code|native machine code]] for a particular hardware/[[operating system]] combination.

Most Java-to-bytecode compilers, [[Jikes]] being a well known exception, do virtually no [[Optimization (computer science)|optimization]], leaving this until [[Run time (computing)|runtime]] to be done by the [[JRE]]{{Fact|date=April 2007}}.

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]].

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== Java decompilers ==

A Java [[Decompiler|decompiler]] tries to reverse the process of compiling, that is it tries to decompile Java bytecode files (*.class) back to Java source files (*.java).

* [[DJ Java Decompiler]] [http://www.neshkov.com/] 10 use trial version

* [[JAD_JAD (JAva_DecompilerJAva Decompiler)|JAD]], written in [[C++]], free for non-commercial use.

* [[JD_Java_DecompilerJD Java Decompiler|JD]] [http://java.decompiler.free.fr/], younger project, includes GUI, optional Eclipse-plugin.

* [[JODE]] [http://jode.sourceforge.net/], decompiler and optimizer, open-source.

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* [http://www.jcp.org/en/jsr/detail?id=199 JSR 199] Java Compiler API [[Java Specification Request]] for invoking the Java compiler from a Java program

{{DEFAULTSORT:Java Compiler}}

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[[Category:Java platform|Compiler]]

[[Category:Java programming language]]

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