integrate simple matlab function into java application -凯发k8网页登录

copy the magicsquareexample folder that ships with matlab to your work folder:

copyfile(fullfile(matlabroot,'toolbox','javabuilder','examples','magicsquareexample'))

at the matlab command prompt, navigate to the new magicsquareexample\magicdemocomp subfolder in your work folder.

examine the makesqr.m function.

function y = makesqr(x)
y = magic(x);

at the matlab command prompt, enter makesqr(5).

the output is a 5-by-5 matrix.

    17    24     1     8    15
    23     5     7    14    16
     4     6    13    20    22
    10    12    19    21     3
    11    18    25     2     9

create a java package that encapsulates makesqr.m by using the library compiler app or .

use the following information for your project:

for example, if you are using compiler.build.javapackage, type:

buildresults = compiler.build.javapackage('makesqr.m', ...
    'packagename','magicsquare', ...
    'classname','magic');

for more details, see the instructions in generate java package and build java application.

write source code for a java application that accesses the matlab function.

the sample application for this example is in magicsquareexample\magicdemojavaapp\getmagic.java.

/* necessary package imports */
import com.mathworks.toolbox.javabuilder.*;
import magicsquare.*;
/*
 * getmagic class computes a magic square of order n. the
 * positive integer n is passed on the command line.
 */
class getmagic
{
   public static void main(string[] args)
   {
      mwnumericarray n = null;   /* stores input value */
      object[] result = null;    /* stores the result */
      magic themagic = null;     /* stores magic class instance */
      try
      {
         /* if no input, exit */
         if (args.length == 0)
         {
            system.out.println("error: must input a positive integer");
            return;
         }
         /* convert and print input value*/
         n = new mwnumericarray(double.valueof(args[0]),mwclassid.double);
         system.out.println("magic square of order "   n.tostring());
         /* create new magic object */
         themagic = new magic();
         /* compute magic square and print result */
         result = themagic.makesqr(1, n);
         system.out.println(result[0]);
      }
      catch (exception e)
      {
         system.out.println("exception: "   e.tostring());
      }
      finally
      {
         /* free native resources */
         mwarray.disposearray(n);
         mwarray.disposearray(result);
         if (themagic != null)
            themagic.dispose();
      }
   }
}

the program does the following:

in matlab, navigate to the magicdemojavaapp folder.

copy the generated magicsquare.jar package into this folder.

in a system command window, navigate to the plotdemojavaapp folder.

compile the java application using javac.

replace matlabroot with the path to your matlab or matlab runtime installation folder. for example, on windows, the path may be c:\program files\matlab\r2023a.

for more details, see compile and run matlab generated java application.

from the system command prompt, run the application.

the application outputs a 5-by-5 magic square in the command window.

    17    24     1     8    15
    23     5     7    14    16
     4     6    13    20    22
    10    12    19    21     3
    11    18    25     2     9

to follow up on this example: