GCJ : Java Glossary

GCJ (GNU Compiler for Java) An optimiser for Java. In UNIX, the command line name for the C compiler is 'cc'. GCC is the GNU (Gnu’ Not Unix!) GCJ is the Java front end to the GNU Compiler Collection (gcc). It can read .java and .class files. It can generate object code or .class code. GCJ comes with its own runtime, which on some platforms includes a (slow) bytecode interpreter. The class libraries are still incomplete. Snapshots and the like are available for the curious.

Normally you download source and do your own build, but there are some builds pre-done. You can download binaries.