Editing GNU Compiler for Java (section)

{{Short description|Java compiler}}
{{Infobox software
| name                   = GNU Compiler for Java
| logo                   = Gcj2.png
| logo size              = 70px
| screenshot             =
| caption                =
| developer              = [[GNU|The GNU Project]]
| released               = {{Start date and age|1998|09|06}}<ref>{{cite web|url=https://gcc.gnu.org/news/gcj-announce.txt|author=Anthony Green, Cygnus Solutions|title=GCJ announcement}}</ref>
| discontinued           = yes
| latest release version = {{wikidata|property|preferred|references|edit|Q1007042|P348|P548=Q2804309}}
| latest release date    = {{wikidata|qualifier|preferred|single|Q1007042|P348|P548=Q2804309|P577}}
| latest preview version = {{wikidata|property|preferred|references|edit|Q1007042|P348|P548=Q51930650}}
| latest preview date    = {{wikidata|qualifier|preferred|single|Q1007042|P348|P548=Q51930650|P577}}
| operating system       = [[Unix-like]]
| programming language   =
| genre                  = [[Compiler]]
| license                = [[GNU General Public License|GNU GPL]]
| website                = {{URL|https://gcc.gnu.org}}
}}
The '''GNU Compiler for Java''' ('''GCJ''') is a discontinued [[Free software|free]] [[compiler]] for the [[Java (programming language)|Java programming language]].  It was part of the [[GNU Compiler Collection]].<ref>{{cite web |url=https://gcc.gnu.org/java/ |title=GCJ: The GNU Compiler for Java - GNU Project - Free Software Foundation (FSF) |access-date=2010-04-22 |url-status=dead |archive-url=https://web.archive.org/web/20070509055923/http://gcc.gnu.org/java/ |archive-date=2007-05-09 }}</ref><ref>{{cite book |last=Campbell |first=Bill |date=2013 |title=Introduction to Compiler Construction in a Java World |url=https://books.google.com/books?id=-b8WjLY2eKEC&pg=PA277 |publisher=CRC Press Taylor & Francis Group |isbn=978-1-4398-6088-5 |access-date=2014-02-06}}</ref>

GCJ compiles Java [[source code]] to [[Java virtual machine]] (JVM) [[bytecode]] or to [[machine code]] for a number of [[CPU architecture]]s. It could also compile [[Class (file format)|class files]] and whole [[JAR (file format)|JARs]] that contain bytecode into machine code.<ref>{{Cite web|url=https://www.linuxjournal.com/article/4860|title = Compiling Java with GCJ &#124; Linux Journal}}</ref><ref>{{Cite web|url=http://freecode.com/projects/gcj|title = GNU Compiler for Java}}</ref>