MATLAB BUILDER JA 2 Guida Utente Scaricare il pdf (Pagina 50)

3 Programming

Object[] y = null;

try

{

cls = new myclass();

y = cls.myprimes(1, new Double((double)n));

return (double[])((MWArray)y[0]).getData();

}

finally

{

MWArray.disposeArray(y);

if (cls != null)

cls.dispose();

}

The import statements at the beginning of the program import packages that

define all the classes that the program requires. These classes are defined in

javabuilder.* and mycomponent.*; the latter defines the class myclass.

The following statement instantiates the class

myclass:

cls = new myclass();

The following statement calls the class method myprimes:

y = cls.myprimes(1, new Double((double)n));

Thesamplecodepassesajava.lang.Double to the myprimes method. The

java.lang.Double is automatically converted to the double data type

required by the encapsu la ted MATLAB

myprimes function.

When

myprimes executes, it finds all prime numbers between 0 and the input

value and returns this in a MATLAB

double array. This array is returned

to the Jav a program as an

MWNumericArray with its MWClassID property set

MWClassID.DOUBLE.

The

myprimes method encapsulates the myprimes function.

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MATLAB BUILDER JA 2 Guida Utente Pagina 50