MATLAB BUILDER JA 2 Podręcznik Użytkownika Pobierz pdf (Strona 68)

3 Programming

cls.dispose();

}

Handling Unchecked Exceptions

Several types of unchecked e xceptio ns can also occur during the course of

execution. Unchecked exceptions are Java exceptions that do not need to be

explicitly declared with a

throws clause. The MWArray API classes all throw

unchecked exceptions.

All unchecked exceptions thrown by

MWArray and its subclasses are s ubclasses

java.lang.RuntimeException. The following e xceptions can be thrown

MWArray:

•

java.lang.RuntimeException

• java.lang.ArrayStoreException

• java.lang.NullPointerException

• java.lang.IndexOutOfBoundsException

• java.lang.NegativeArraySizeException

This list re pre sents the most likely exceptions. Others might be added in the

future. For information on the exceptions that can occur for each method of

MWArray and its subclasses, see Using MWA rray Classe s.

Code Fragment: Catching General Exceptions

You can easily rewrite the getprimes example to catch any exception that can

occur during the method call and data conversion. Just change the

catch

clause to catch a general java.lang.Exception.

public double[] getprimes(int n)

{

myclass cls = null;

Object[] y = null;

try

{

cls = new myclass();

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MATLAB BUILDER JA 2 Podręcznik Użytkownika Strona 68