JRuby 9.0.4.0 发布，此版本现已提供下载：
Homepage: http://www.jruby.org/
Download: http://www.jruby.org/download
JRuby 9000 是 JRuby 最新的主要版本，兼容 Ruby 2.2.x，同步 C Ruby。 JRuby 9.0.4.0 是第三个主要版本。
JRuby 9.0.4.0 修复了 Windows 上新 stat() 实现的一些问题。
JRuby 9000 主要特性：
Ruby 2.2 兼容
基于一个传统编译器设计的优化运行时
新的 POSIX-friendly IO 和 Process
完全从 MRI 移植 encoding/transcoding 逻辑
相比 9.0.3.0，值得关注的改进：
Resolved various issues with stat() on Windows
Fixed couple of encoding/transcoding issues
Source with __FILE__ in it will now JIT
Native call subsystem will load on mixed 32/64 bit Linux distributions
11 issues fixed for 9.0.4.0
JRuby 9.0.4.0 Github Issues 列表
#3457 - stat.st_gid is unsupported on windows
#3449 - jirb fails to start on Windows
#3448 - File.stat("someunavailable").mtime returns odd result
#3444 - Fix TCPServer#accept NPE log
#3442 - String#crypt crashes when a receiver is shared String
#3425 - String#tr different behavior as compared to MRI Ruby
#3410 - Cannot install jRuby 9.0.3.0
#3409 - NotImplementedError: flock unsupported or native support failed to load
#3408 - IRB fails to start with JRuby9.0.3.0 on Windows 10.
#3197 - require_relative fails for relative paths within jars on Windows
#2381 - IO#rewind ... doesn't. (when backed by a ByteArrayInputStream).
软件详情：http://jruby.org/2015/11/13/jruby-9-0-4-0.html
来自:开源中国社区
