javaoctave jar文件在Mac OSX Eclipse中失败 [英] javaoctave jar file has failed in Mac OSX Eclipse

问题描述

我想使用Octave（开源MatLab）进行计算。因此，我尝试使用javaoctave （https://kenai.com/projects/javaoctave ）来帮助我在java中进行计算。但是，当我想编译我的代码时，我会收到以下错误：

 线程main中的异常dk.ange.octave .exception.OctaveIOException：java.io.IOException：无法运行程序octave：error = 2，没有这样的文件或目录
在dk.ange.octave.exec.OctaveExec。< init>（OctaveExec.java ：102）
 at dk.ange.octave.OctaveEngine。< init>（OctaveEngine.java:65）
 at dk.ange.octave.OctaveEngineFactory.getScriptEngine（OctaveEngineFactory.java:49）
在learn.CapabilityLearner.connectOctave（CapabilityLearner.java:72）
在learn.CapabilityLearner.connect（CapabilityLearner.java:37）
在learn.CapabilityLearner。< init>（CapabilityLearner.java： 24）
在learn.capability.CapabilityMeanVarianceEquation。< init>（CapabilityMeanVarianceEquation.java:10）
 at parse.basketball.runner.GetPlayerFrequency.learnSynergyGraph（GetPlayerFrequency.java:102）
 at parse.basketball.runner.GetPlayerFrequency.main（GetPlay erFrequency.java:94）
导致：java.io.IOException：无法运行程序octave：error = 2，没有这样的文件或目录
在java.lang.ProcessBuilder.processException（ProcessBuilder。 java.lang.Runtime.exec（Runtime.java:593）
 .octave.exec.OctaveExec。< init>（OctaveExec.java:100）
 ... 8更多
导致：java.io.IOException：error = 2，没有这样的文件或目录
在java.lang.UNIXProcess.forkAndExec（本机方法）
在java.lang.UNIXProcess。< init>（UNIXProcess.java:53）
在java.lang.ProcessImpl.start（ ProcessImpl.java:91）
在java.lang.ProcessBuilder.start（ProcessBuilder.java:452）
 ... 10更多
  

这个java项目已经在使用Eclipse Kepler的Windows机器上成功运行，所以我认为它不是包含错误的代码。 wiki 提到了错误，给出了一些解释。然而，由于我缺乏编程经验，我无法掌握解决方案的意义。任何人都可以帮我找出问题，教我如何解决这个问题？

非常感谢！ ：）

PS：项目的.classpath如下：

 <？xml version =1.0encoding =UTF-8？> 
< classpath> 
< classpathentry kind =srcpath =src/> 
< classpathentry kind =libpath =matlabcontrol-4.0.0.jar/> 
< classpathentry kind =libpath =javaoctave-0.6.4.jarsourcepath =javaoctave-0.6.4.jar/> 
< classpathentry kind =conpath =org.eclipse.jdt.launching.JRE_CONTAINER/> 
< classpathentry kind =libpath =commons-math-2.2.jar/> 
< classpathentry kind =libpath =commons-logging-1.1.3.jar/> 
< classpathentry kind =outputpath =bin/> 
< / classpath> 
  

解决方案

您可以轻松地解决您的问题设置Factory

  OctaveEngineFactory factory = new OctaveEngineFactory（）; 
 factory.setOctaveProgram（new File（path_to_octave_executable））; 
 OctaveEngine octave = factory.getScriptEngine（）; 
  

bgcode

Hi I am currently using Eclipse Kepler for my java project.

I wanted to use the Octave (the open sourced MatLab) for calculation. Therefore I have tried to use the javaoctave (https://kenai.com/projects/javaoctave) to help me do the calculation in java. However, when I want to compile my code I get the following error:

Exception in thread "main" dk.ange.octave.exception.OctaveIOException: java.io.IOException: Cannot run program "octave": error=2, No such file or directory
    at dk.ange.octave.exec.OctaveExec.<init>(OctaveExec.java:102)
    at dk.ange.octave.OctaveEngine.<init>(OctaveEngine.java:65)
    at dk.ange.octave.OctaveEngineFactory.getScriptEngine(OctaveEngineFactory.java:49)
    at learn.CapabilityLearner.connectOctave(CapabilityLearner.java:72)
    at learn.CapabilityLearner.connect(CapabilityLearner.java:37)
    at learn.CapabilityLearner.<init>(CapabilityLearner.java:24)
    at learn.capability.CapabilityMeanVarianceEquation.<init>(CapabilityMeanVarianceEquation.java:10)
    at parse.basketball.runner.GetPlayerFrequency.learnSynergyGraph(GetPlayerFrequency.java:102)
    at parse.basketball.runner.GetPlayerFrequency.main(GetPlayerFrequency.java:94)
Caused by: java.io.IOException: Cannot run program "octave": error=2, No such file or directory
    at java.lang.ProcessBuilder.processException(ProcessBuilder.java:478)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:457)
    at java.lang.Runtime.exec(Runtime.java:593)
    at dk.ange.octave.exec.OctaveExec.<init>(OctaveExec.java:100)
    ... 8 more
Caused by: java.io.IOException: error=2, No such file or directory
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:53)
    at java.lang.ProcessImpl.start(ProcessImpl.java:91)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:452)
    ... 10 more

This java project has been successfully run on a Windows machine with Eclipse Kepler so I think it is not the code I have that contains an error. the wiki has mentioned the error and some explanation is given. However, due to my lack of experience with programming I could not have grasped the meaning of the solutions. Can anyone help me to identify the problem and teach me how I shall fix this?

With many thanks ! :)

PS : the .classpath of the project is as followed:

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" path="src"/>
    <classpathentry kind="lib" path="matlabcontrol-4.0.0.jar"/>
    <classpathentry kind="lib" path="javaoctave-0.6.4.jar" sourcepath="javaoctave-0.6.4.jar"/>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
    <classpathentry kind="lib" path="commons-math-2.2.jar"/>
    <classpathentry kind="lib" path="commons-logging-1.1.3.jar"/>
    <classpathentry kind="output" path="bin"/>
</classpath>

解决方案

You can easily solve your problem setting up the Factory

OctaveEngineFactory factory = new OctaveEngineFactory();
factory.setOctaveProgram(new File("path_to_octave_executable"));
OctaveEngine octave = factory.getScriptEngine();

bgcode

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