GNU Classpath

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GNU Classpath

Screenshot Demonstration of the GNU Classpath Swing
Developer(s)	GNU Project (formally held by FSF)
Final release	0.99[1] / March 16, 2012; 12 years ago (2012-03-16)
Repository	git.savannah.gnu.org/cgit/classpath.git
Written in	C and Java
Operating system	Cross-platform
Type	Library
License	GPL linking exception
Website	www.gnu.org/software/classpath/

GNU Classpath is a free software implementation of the standard class library for the Java programming language. Most classes from J2SE 1.4 and 5.0 are implemented. Classpath can thus be used to run Java-based applications. GNU Classpath is a part of the GNU Project. It was originally developed in parallel with libgcj due to license incompatibilities, but later the two projects merged.

GNU Classpath was deemed a high priority project by the Free Software Foundation. When the Classpath project began, the license for the official Java implementation from Sun Microsystems did not allow distribution of any alterations. Since the inception of the Classpath project, the OpenJDK was released under the GPL and now serves as the official reference implementation for the Java platform.