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OpenJDK (Open Java Development Kit) is a free and open-source implementation of the Java Platform, Standard Edition (Java SE). [2] It is the result of an effort Sun Microsystems began in 2006, four years before the company was acquired by Oracle Corporation .
Free Java implementations are software projects that implement Oracle's Java technologies and are distributed under free software licences, making them free software. Sun released most of its Java source code as free software in May 2007, so it can now almost be considered a free Java implementation. [ 1 ]
Blackdown Java was a licensed port to Linux of the reference SunSoft implementation. It was discontinued in 2007, after OpenJDK became available. Sun CVM – CVM originally standing for "Compact Java Virtual Machine". Gemstone – modified for Java EE features (application DBMS). Intent (Tao Group).
GraalVM for JDK 20 2023-06-13 Oracle JDK 20.0.1 OpenJDK 20.0.1 GraalVM for JDK 21 2023-09-19 Oracle JDK 21 OpenJDK 21 This release brought all Java SE 21 features to GraalVM such as virtual threads from Project Loom. Performance improvements in this release made ahead-of-time compiled Java applications run at peak performance as on HotSpot.
It is derivative of the community driven OpenJDK which Oracle stewards. [5] It provides software for working with Java applications. Examples of included software are the Java virtual machine, a compiler, performance monitoring tools, a debugger, and other utilities that Oracle considers useful for Java programmers.
The Java language has undergone several changes since JDK 1.0 as well as numerous additions of classes and packages to the standard library.Since J2SE 1.4, the evolution of the Java language has been governed by the Java Community Process (JCP), which uses Java Specification Requests (JSRs) to propose and specify additions and changes to the Java platform.
In the meantime, a third-party project called IcedTea created a completely free and highly usable JDK by replacing encumbered code with either stubs or code from GNU Classpath. However OpenJDK has since become buildable without the encumbered parts (from OpenJDK 6 b10 [93]) and has become the default runtime environment for most Linux ...
IcedTea is a build and integration project for OpenJDK launched by Red Hat in June 2007. [3] IcedTea also includes some addon libraries: IcedTea-Web is a free software implementation of Java Web Start and the Java web browser applet plugin.