How can I find out what class this is?

**nolsen01** · 03-05-2010, 08:37 PM

I have an EventObject which is the ancestor of KeyEvent.

I'd like to find out if EventObject e is a KeyEvent.

How can I do this?

**Addez** · 03-05-2010, 08:52 PM

Im not so sure about this..
But maybe, Only Maybe.. you could do:
boolean isAncestor = (KeyObject.getClass().getSuperclass() == KeyEvent)

Idk. im not sure, but it would be my guess..

**StormyWaters** · 03-05-2010, 09:01 PM

Java Code:

if (e instanceof KeyEvent) {
     KeyEvent e2 = (KeyEvent)e;
}

**Addez** · 03-06-2010, 09:25 AM

Hum.. last time I checked instanceOf was broken, have they fixed that?

**JosAH** · 03-06-2010, 10:58 AM

Originally Posted by Addez

Hum.. last time I checked instanceOf was broken, have they fixed that?

AFAIK instanceof was never broken; it checks whether or not the object's class is assignable from the other operand (a class). People sometimes don't expect the value to be true if a sub class of the class being tested is passed as the other argument.

kind regards,

Jos

**Addez** · 03-09-2010, 06:50 AM

Ohwell.
When I tried to use it in one of my first codes for about half a year ago.
Then it didnt work and I asked why and got the answer that it was broken :(

**DarrylBurke** · 03-09-2010, 08:16 AM

Sure, if you tried instanceOf your code wouldn't compile. Java is case sensitive.

db

**Addez** · 03-09-2010, 05:16 PM

yea I used the real instance of method even if I misspelled it in this post.

**Steve11235** · 03-09-2010, 05:40 PM

OK. "instanceof" is an operator, not a method. It is all lower case, no parentheses. Many consider using the operator poor practice, but that is only because some overuse the operator. For what you are doing, it is a valid approach and will work.