MATLAB: Do I get a Java exception when invoking a user-defined Java class in MATLAB 7.5 (R2007b) on Solaris

developmentjavajrekitMATLABnotruntimesupporteduser-defined

I have some user-defined Java classes built using JDK version 1.6.
When I try to import and invoke the class into MATLAB 7.5 (R2007b), I get the following error message:
 Warning: A Java exception occurred trying to load the com/arm/libparser/Library class:
 Java exception occurred:
 java.lang.UnsupportedClassVersionError: Bad version number in .class file
 at java.lang.ClassLoader.defineClass1(Native Method).....

Best Answer

This error message is due to an unsupported version of the Java Development Kit (JDK) being used to compile the user-defined Java classes.
The library classes were built using JDK version 1.6, whereas in Solaris 64-bit, MATLAB 7.5 (R2007b) is compatible with JDK 1.5 only.
To resolve this issue, you may either compile the user-defined Java classes using JDK version 1.5 and then invoke it using MATLAB 7.5 (R2007b), or directly call this user-defined Java class in MATLAB 7.6 (R2008a) and 7.7 (R2008b), which are compatible with JDK 1.6.
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