Free Java implementations are software projects that implement Oracle's Java technologies and are distributed under free software licences, making them...

OpenJDK (Open Java Development Kit) is a free and open-source implementation of the Java Platform, Standard Edition (Java SE). It is the result of an...

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...

Comparison of Java virtual machines Free Java implementations Java processor Dalvik virtual machine "GCJ - GCC Wiki". gcc.gnu.org. List of Java virtual machines...

is at least one free-software partial implementations of Swing that may be usable.". The GNU CLASSPATH was never completed to even Java 1.2 status and...

These implementations also tended to be far less optimized than Sun's.[citation needed] Sun announced in JavaOne 2006 that Java would become free and open-source...

main free software class library for Java. Contrary to other implementations, it only implements the Class Library, and is used by many free Java runtimes...

is Java SE. Releases are based on the OpenJDK project, a free and open-source project with an open development model. Other Java implementations exist...

Java bytecode is the instruction set of the Java virtual machine (JVM), crucial for executing programs written in the Java language and other JVM-compatible...

demonstration examples. It can run on Java runtimes from version 1.1 upwards, including free Java implementations such as Kaffe. HSQLDB is available under...