为什么我在matlab上写的程序打成jar包 导入java程序运行就出错

Question

package testGraph;

//import paintgraph.MatlabPaint;
import com.mathworks.toolbox.javabuilder.MWException;

import toAdd.Adds;

public class TestPaint {

/**
 * @param args
 */
public static void main(String[] args) {
    Adds a;
    try {
        a = new Adds();
        Object[] b=new Object[2];
        b[0]=a.paint(1, 1,2);
    } catch (MWException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

}

Exception in thread "main" java.lang.ExceptionInInitializerError
at com.mathworks.toolbox.javabuilder.internal.MCRConfiguration.getMCRRoot(MCRConfiguration.java:92)
at com.mathworks.toolbox.javabuilder.internal.MCRConfiguration$ModuleDir.(MCRConfiguration.java:66)
at com.mathworks.toolbox.javabuilder.internal.MCRConfiguration.getModuleDir(MCRConfiguration.java:71)
at com.mathworks.toolbox.javabuilder.internal.MWMCR.(MWMCR.java:1571)
at toAdd.ToAddMCRFactory.(ToAddMCRFactory.java:99)
at toAdd.Adds.(Adds.java:61)
at testGraph.TestPaint.main(TestPaint.java:16)
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
at java.lang.String.substring(String.java:1938)
at com.mathworks.toolbox.javabuilder.internal.MCRConfiguration$MCRRoot.get(MCRConfiguration.java:85)
at com.mathworks.toolbox.javabuilder.internal.MCRConfiguration$MCRRoot.(MCRConfiguration.java:87)
... 7 more

不知道为什么 看了下jdk的版本是java 1.6.0_20 matlab的java版本是 java 1.6.0_12_b04

Answer 1

at testGraph.TestPaint.main(TestPaint.java:16行)
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
索引越界了。