Why do I get the error message "??? Error Using==> javaObject" when I try to use Java objects that call native methods?

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MathWorks Support Team 2009-6-27

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编辑： MathWorks Support Team 2013-10-26

I have a JAR file that includes a Java class that calls a native method. After making this class available to MATLAB by adding the full path and filename of the JAR file to classpath.txt, I get the following error message when I try to invoke the Java object constructor in MATLAB:

jo = javaObject('com.freddiemac.fir.finance.TermStructure')

??? Error using ==> javaObject

No class com.freddiemac.fir.finance.TermStructure can be located on Java

class path.

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Answer 1

MathWorks Support Team 2013-10-18

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In the case where your Java object calls a native method, this error message indicates that you do not have your system path set correctly.

Native methods are implemented in shared libraries or dynamic-link libraries, and if the location of the shared libraries is not set in the environment variable "Path", a java.lang.UnsatisfiedLinkError error occurs and the object is not created in MATLAB.

For information on setting your system path, see the Related Solution listed below.