Question

当我在命令行或任何其他ruby可执行文件（例如rake，bundle等）上运行jruby.exe时，它会打印java帮助消息（如下所示），就好像我有只需在命令行上执行java即可。

我不知道这是怎么发生的。因为周五一切似乎都运转良好。我检查了我的PATH变量JRUBY_OPTS变量，所有内容都已正确设置。如果有人理解为什么会发生这种情况以及我如何重新考虑这一点，那将非常感激。我已经好几个小时都没有成功。

示例：

cmd> rake

Usage: java [-options] class [args...]
       (to execute a class)
   or  java [-options] -jar jarfile [args...]
       (to execute a jar file)

where options include:
-server       to select the "server" VM
-hotspot      is a synonym for the "server" VM  [deprecated]
              The default VM is server.

-cp <class search path of directories and zip/jar files>
-classpath <class search path of directories and zip/jar files>
              A ; separated list of directories, JAR archives,
              and ZIP archives to search for class files.
-D<name>=<value>
              set a system property
-verbose[:class|gc|jni]
              enable verbose output
-version      print product version and exit
-version:<value>
              require the specified version to run
-showversion  print product version and continue
-jre-restrict-search | -jre-no-restrict-search
              include/exclude user private JREs in the version search
-? -help      print this help message
-X            print help on non-standard options
-ea[:<packagename>...|:<classname>]
-enableassertions[:<packagename>...|:<classname>]
              enable assertions
-da[:<packagename>...|:<classname>]
-disableassertions[:<packagename>...|:<classname>]
              disable assertions
-esa | -enablesystemassertions
              enable system assertions
-dsa | -disablesystemassertions
              disable system assertions
-agentlib:<libname>[=<options>]
              load native agent library <libname>, e.g. -agentlib:hprof
                see also, -agentlib:jdwp=help and -agentlib:hprof=help
-agentpath:<pathname>[=<options>]
              load native agent library by full pathname
-javaagent:<jarpath>[=<options>]
              load Java programming language agent, see java.lang.instrument

-splash:<imagepath>
              show splash screen with specified image

Answer 1

Windows Update似乎解决了这个问题。这已不再发生。

Answer 2

在我的情况下（Windows），我从/和JAVA_HOME的末尾删除了结尾的JRUBY_HOME，这使jruby起作用了。此后，选项将停止打印。

调用JRuby会调出java选项菜单

2 个答案: