The Gnu Project has released version 3.4.4 of GCC,
the GNU Compiler Collection.
GCC contains frontends for C, C++, Objective C, Chill, Fortran, Ada, and Java as well as libraries for these languages.
GCC is a clean room implementation of Java that doesn't use any Sun code,
so it doesn't always exactly match Sun release versions, but this is roughly at the Java 1.4 level with some omissions. 3.4.4 is a bug fix release. It isn't immediately obvious if any of the bug fixes apply to
the Java parts of the compiler but it looks like a few of them might.