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社区首页 >问答首页 >尝试在IOKE shell中运行代码会导致错误吗？

问尝试在IOKE shell中运行代码会导致错误吗？
EN

Stack Overflow用户
提问于 2016-07-06 20:12:04
回答 1查看 25关注 0票数 2

当我试图在IOKE shell中执行代码时，它崩溃了。

代码语言：javascript
复制
 >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？我使用的是Windows10，设置了IOKE_HOME和JAVA_HOME环境变量(否则就不会在第一个地方调用REPL )。任何帮助都将不胜感激。

ioke
java
windows
jvm
EN

回答 1

Stack Overflow用户

发布于 2020-07-31 06:32:56

我怀疑这与Ioke试图使用某个Java API检索用户的主目录有关。我发现，尽管设置了HOME环境变量，但以没有主目录的用户身份运行Ioke时，该问题在Linux上重现。我可以通过设置JAVA_OPTS环境变量来解决这个问题：

代码语言：javascript
复制
$ JAVA_OPTS="-Duser.home=$PWD" ioke

请注意，其他基于Java的编程语言(如Kotlin )也会出现类似的问题，有时也可以采用相同的解决方法。显然，有人在Java中做了一个非常糟糕的设计决策。

请注意，Ioke自2011年以来已被完全放弃，未来不太可能收到任何更新或支持。

票数 0
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/38223716

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