JRuby 9.0.1.0 发布，Java 的 Ruby 解释器

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JRuby 社区很高兴地宣布的 JRuby 9.0.1.0 发布。JRuby 9000 是最新的主流版本，兼容 Ruby 2.2.x，而  JRuby 9.0.1.0 是首个维护版本。
与 9.0.0.0 版本比较，该版本改进包括：

• 　　Reduced memory usage since 9.0.0.0 by 13%
  
• 　　Improved support for refinements; 70% of CRuby tests passing
  
• 　　jruby-openssl updated to version 0.9.11
  
• 　　psych updated to version 2.0.15
  
• 　　44 issues fixed for 9.0.1.0
  

　　完整 issue 列表：

• 　　#3288 - 9K seems to be handling all jruby.xxx properties
  
• 　　#3284 - Spec improvements
  
• 　　#3283 - Not getting SIGCHLD when a child process dies
  
• 　　#3277 - Spec improvements
  
• 　　#3276 - Class with prepended module is its own superclass
  
• 　　#3271 - bigdecimal & bigmath
  
• 　　#3265 - Updates for RSpec 3
  
• 　　#3251 - jruby: warning: unknown property jruby.{memory,stack}.max
  
• 　　#3249 - Socket.send freezes string unexpectedly (RuntimeError: can't modify frozen string)
  
• 　　#3248 - File.fnmatch doesn't match german vowels
  
• 　　#3245 - Parser fails on `assert_equal(true, (not ()))` expresion
  
• 　　#3238 - Fix Digest bubblebabble incorrect output on empty string
  
• 　　#3237 - $! gets unset by rescue, even when the rescue doesn't catch the error
  
• 　　#3233 - Rails.root set to "uri:classloader:/" for new Rails app with JRuby 9.0.0.0
  
• 　　#3228 - Fix an embedded runtime memory leak in Java7ClassValue
  
• 　　#3227 - Array#uniq behavior differs from MRI with BasicObject members
  
• 　　#3224 - removed unused FileIO class from persistence.util
  
• 　　#3221 - big decimal parser
  
• 　　#3220 - RubyInstanceConfig#setupEnvironment throws AccessControlException on Windows
  
• 　　#3218 - add to_h to the class used for ENV
  
• 　　#3211 - bignum speedup
  
• 　　#3200 - Fixing RangeError with code from 1.7 branch
  
• 　　#3198 - licensing information out of date?
  
• 　　#3189 - 9k fail ftp on Windows
  
• 　　#3188 - jruby-1_7 merge failures on master
  
• 　　#3187 - Add MRI test for proc visibility
  
• 　　#3175 - 9k fail to compile ruby code of using multibyte char on Windows
  
• 　　#3174 - ensure clause is executed before begin clause ends ?
  
• 　　#3173 - Can't reference the proc itself in a proc
  
• 　　#3165 - Fix RubyRange#initialize_copy mistakenly erroring on #dup'ing a range
  
• 　　#3163 - dup on Range regression
  
• 　　#3162 - Different results for `to_h` and `to_hash` on `ENV`
  
• 　　#3118 - Jruby 9000 RC1 throws Java::JavaLang::ClassCastException: org.jruby.RubyBignum cannot be cast to org.jruby.RubyFixnum
  
• 　　#2956 - bubblebabble is wrong for empty strings
  
• 　　#2901 - Psych fails with MBC strings in ASCII-8BIT
  
• 　　#2148 - BigMath.log fails MRI 2.2 tests
  
• 　　#2131 - Divergent behavior in MRI vs JRuby wrt Class::undef
  
• 　　#1968 - JRuby Yaml implementation (psych) fails dumping "-."
  
• 　　#1907 - Frozen
  
• 　　#1900 - "invalid byte sequence in UTF-8" after String#encode!; behavior differs from MRI (JRuby-1.7.13)
  
• 　　#1877 - Array#delete_if - no size update
  
• 　　#1770 - Wrong julian day for DateTime with a negative rational offset
  
• 　　#1328 - Encoding of symbol literals does not respect the encoding of the source file
  
• 　　#378 - Need ability to set Socket.setReuseAddress() in RubyTCPSocket.java
  

JRuby是面向Ruby、基于Java虚拟机(JVM)的一种解释程序，它结合了Ruby语言的简易性和功能强大的JVM的执行机制，包括与Java库全面集成。Rails彻底加快及简化了Web应用的开发，不过它让人觉得不够成熟，特别是在高端企业级功能方面。另一方面，Java平台及其虚拟机、库和应用服务器的速度、稳定性和功能方面却一直在提升，现在已被公认为是开发高端服务器应用的领先平台。不过如果Java平台不与Ruby等新兴语言联系在一起，就有可能落后于流行趋势。