试图在IOKE shell中运行代码导致错误？

时间：2016-07-06 12:12:04

标签： java windows jvm ioke

当我尝试在IOKE shell中执行代码时，它会崩溃。

 >ioke
 iik> "Hello World" println
Exception in thread "main" java.lang.NullPointerException
            at ioke.lang.IokeIO$2.activate(IokeIO.java:129)
            at ioke.lang.TypeCheckingNativeMethod.activate(TypeCheckingNativeMethod.java:50)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateCompleteWithoutExplicitReceiver(Message.java:1145)
            at ioke.lang.Message.getEvaluatedArgument(Message.java:979)
            at ioke.lang.Message.getEvaluatedArgument(Message.java:983)
            at ioke.lang.FlowControlBehavior$9.activate(FlowControlBehavior.java:379)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Locals$1.activate(Locals.java:63)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateCompleteWith(Message.java:1093)
            at ioke.lang.LexicalBlock.activate(LexicalBlock.java:198)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.LexicalBlock$2.activate(LexicalBlock.java:86)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:1011)
            at ioke.lang.FileSystem$7.activate(FileSystem.java:308)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateCompleteWithoutExplicitReceiver(Message.java:1145)
            at ioke.lang.ConditionsBehavior$4.activate(ConditionsBehavior.java:342)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Locals$1.activate(Locals.java:63)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateCompleteWithoutExplicitReceiver(Message.java:1145)
            at ioke.lang.Message.getEvaluatedArgument(Message.java:979)
            at ioke.lang.Message.getEvaluatedArgument(Message.java:983)
            at ioke.lang.FlowControlBehavior$7.activate(FlowControlBehavior.java:298)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Locals$1.activate(Locals.java:63)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateCompleteWithoutExplicitReceiver(Message.java:1145)
            at ioke.lang.ConditionsBehavior$4.activate(ConditionsBehavior.java:342)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Locals$1.activate(Locals.java:63)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateCompleteWith(Message.java:1093)
            at ioke.lang.DefaultMethod.activate(DefaultMethod.java:283)
            at ioke.lang.IokeObject.activate(IokeObject.java:1053)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:1038)
            at ioke.lang.IokeObject.getOrActivate(IokeObject.java:514)
            at ioke.lang.IokeObject.perform(IokeObject.java:659)
            at ioke.lang.IokeObject.perform(IokeObject.java:592)
            at ioke.lang.IokeObject.perform(IokeObject.java:522)
            at ioke.lang.Message.sendTo(Message.java:999)
            at ioke.lang.Message.evaluateComplete(Message.java:1066)
            at ioke.lang.Runtime.evaluateString(Runtime.java:525)
            at ioke.lang.Main.main(M

ain.java:149)

导致此错误的原因是什么？我使用Windows 10，设置了我的IOKE_HOME和JAVA_HOME env变量（否则首先不会调用REPL）。任何帮助将不胜感激。

1 个答案:

答案 0 :(得分：0)

我怀疑这与Ioke尝试使用一些Java API来检索用户的主目录有关。我发现，尽管设置了HOME环境变量，但以没有主目录的任何用户身份运行Ioke时，在Linux上仍会重现该问题。我可以通过设置JAVA_OPTS环境变量来解决此问题：

$ JAVA_OPTS="-Duser.home=$PWD" ioke

请注意，其他基于Java的编程语言（例如Kotlin）也会发生类似的问题，并且有时可以应用相同的解决方法。显然，有人在Java API中做出了一个非常糟糕的设计决策。

请注意，自2011年以来，Ioke已被完全废弃，并且将来不太可能获得任何更新或支持。

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