Problems with using MATLAB Engine API for Java.

Question

manan lalit 2017-3-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/327681-problems-with-using-matlab-engine-api-for-java

评论： manan lalit 2017-3-2

Hello,

I wish to use the MATLAB Engine API in order to handle data and use MATLAB functions, in conjunction with a Java Front-End for the purpose of a graphical user interface.

To begin with, I tried playing with some sample code. As a first step, I added the external library (`Engine.jar') to my project in Eclipse:

Next, I wrote the following `test code' in order to check for effective compilation:

package application;
  
import com.mathworks.engine.*;
public class Main {
  public static void main(String[] args) throws Exception {
      MatlabEngine eng = MatlabEngine.startMatlab();
      eng.evalAsync("[X, Y] = meshgrid(-2:0.2:2);");
      eng.evalAsync("Z = X .* exp(-X.^2 - Y.^2);");
      Object[] Z = eng.getVariable("Z");
      eng.close();
    }
 }

Following is the hierarchy of files in my Java project:

This leads to the following error message:

Exception in thread "main" java.lang.NoClassDefFoundError: com/mathworks/mvm/MvmTerminatedException
  at application.Main.main(Main.java:7)
Caused by: java.lang.ClassNotFoundException: com.mathworks.mvm.MvmTerminatedException
  at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
  ... 1 more