On 13 November 2006, Sun released its compiler, javac, under the GNU General Public License. Notable applications that already worked with free software Java implementations before November 2006 include and Vuze, both of which work when compiled with GCJ. Following controversy, adopted a guideline requiring it to work with free Java implementations. In May 2005, Apache Harmony was announced, however, the project chose the Apache License, which was at the time incompatible with all existing free Java implementations.Īnother event in May 2005 was the announcement that 2.0 would depend on Java features which free software implementations couldn't provide. Most free runtimes use GNU Classpath as their class library. GNU Classpath is the main free software class library for Java. Įxamples of free runtime environments include Kaffe, SableVM and gcj. Since the GNU Compiler Collection's 4.3 release, GCJ (its Java compiler) is using the ECJ parser front-end for parsing Java. Others include the Eclipse Java Compiler (ECJ), which is maintained by the Eclipse Foundation, and Jikes, which is no longer actively maintained. Since then, the free software movement developed other Java compilers, most notably the GNU Compiler for Java. ![]() The first free project to offer substantial parts of Java platform functionality was likely guavac, which began some time before November 1995.
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