Anonymous inner class and Exception Handling

[Marco Pacini]

Hi all.

I'm studying inner class and i don't understand why it isn't possible throw an anonymous inner class like following exemple:

throw new AnonymousInnerClass() {
    //class body
};

Regards

[Rob Spoor]

Does AnonymousInnerClass extend Throwable, Exception, RuntimeException or any other exception class? The following is perfectly legal:

public class Test
{
    public static void main(String[] args) throws Exception
    {
        throw new Exception() // no message so it should be null
        {
            public String getMessage()
            {
                return "Not null!";
            }
        };
    }
}

[Marco Pacini]

If i define the inner class when throw it, can i explain that it extend Throwable, Exception, RuntimeException or any other exception class?

[Wouter Oet]

throw new Exception() { }; // extends Exception
throw new Throwable() { }; // extends Throwable
throw new RuntimeException() { };   // extends RuntimeException

[Paul Clapham]

Marco Pacini wrote:If i define the inner class when throw it, can i explain that it extend Throwable, Exception, RuntimeException or any other exception class?

Of course.

public class BadThingHappened extends Exception {
// code goes here
}

and this can be an inner class if you like.