Question

matlab与java混合编程报错

Exception in thread "main" java.lang.ExceptionInInitializerError
at com.mathworks.toolbox.javabuilder.internal.MCRConfiguration.getMCRRoot(MCRConfiguration.java:77)
at com.mathworks.toolbox.javabuilder.internal.MCRConfiguration$ModuleDir.<clinit>(MCRConfiguration.java:51)
at com.mathworks.toolbox.javabuilder.internal.MCRConfiguration.getModuleDir(MCRConfiguration.java:56)
at com.mathworks.toolbox.javabuilder.internal.MWMCR.<clinit>(MWMCR.java:1447)
at java4.Java4MCRFactory.<clinit>(Java4MCRFactory.java:99)
at java4.Java4.<init>(Java4.java:61)
at test.test3.main(test3.java:14)
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
at java.lang.String.substring(Unknown Source)
at com.mathworks.toolbox.javabuilder.internal.MCRConfiguration$MCRRoot.get(MCRConfiguration.java:70)
at com.mathworks.toolbox.javabuilder.internal.MCRConfiguration$MCRRoot.<clinit>(MCRConfiguration.java:72)
... 7 more
我按照步骤操作了，而且试了许多不同的程序，都报错，这是什么原因？

Answer 1

StringIndexOutOfBoundsException: 这个是字符串操作越界了,检查一下代码,是不是有substring这样的操作,应该是这样引起的