Editing Java (programming language) (section)

== Implementations ==
{{See also|Free Java implementations|List of Java compilers}}
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[[Oracle Corporation]] owns the official implementation of the Java SE platform, due to its acquisition of [[Sun Microsystems]] on January 27, 2010. This implementation is based on the original implementation of Java by Sun. The Oracle implementation is available for [[Microsoft Windows|Windows]], [[macOS]], [[Linux]], and [[Solaris (operating system)|Solaris]]. Because Java lacks any formal standardization recognized by [[Ecma International]], ISO/IEC, ANSI, or other third-party standards organizations, the Oracle implementation is the [[de facto standard]].

The Oracle implementation is packaged into two different distributions: The Java Runtime Environment (JRE) which contains the parts of the Java SE platform required to run Java programs and is intended for end users, and the [[Java Development Kit]] (JDK), which is intended for software developers and includes development tools such as the [[Java compiler]], [[Javadoc]], [[JAR (file format)|Jar]], and a [[debugger]]. Oracle has also released [[GraalVM]], a high performance Java dynamic compiler and interpreter.

[[OpenJDK]] is another Java SE implementation that is licensed under the GNU GPL. The implementation started when Sun began releasing the Java source code under the GPL. As of Java SE 7, OpenJDK is the official Java reference implementation.

The goal of Java is to make all implementations of Java compatible. Historically, Sun's trademark license for usage of the Java brand insists that all implementations be ''compatible''. This resulted in a legal dispute with [[Microsoft]] after Sun claimed that the Microsoft implementation did not support [[Java remote method invocation]] (RMI) or [[Java Native Interface]] (JNI) and had added platform-specific features of their own. Sun sued in 1997, and, in 2001, won a settlement of US$20&nbsp;million, as well as a court order enforcing the terms of the license from Sun.<ref>{{cite news |last1=Niccolai |first1=James |date=2001-01-24 |title=Sun, Microsoft settle Java lawsuit |url=https://www.infoworld.com/article/2074908/sun-microsoft-settle-java-lawsuit.html |work=[[JavaWorld]] |agency=[[IDG News Service]] |access-date=2020-07-13 |archive-date=July 14, 2020 |archive-url=https://web.archive.org/web/20200714001541/https://www.infoworld.com/article/2074908/sun-microsoft-settle-java-lawsuit.html |url-status=live}}</ref> As a result, Microsoft no longer ships Java with [[Microsoft Windows|Windows]].

Platform-independent Java is essential to [[Java Platform, Enterprise Edition|Java EE]], and an even more rigorous validation is required to certify an implementation. This environment enables portable server-side applications.