Instantiate an abstract class?

[matt love]

If Number is an abstract class, why does the following print the affirmative?

Is the int being boxed to an Integer?

    	

Number n = 123456789;  
    	
if (n instanceof Number){ System.out.println("sure is");  //"sure is" is printed
if (n instanceof Integer){ System.out.println("sure is");  //"sure is" is printed
    	
//

Thanks.

Matt

[Bear Bibeault]

What does n.getClass() tell you?

[matt love]

class java.lang.Integer


Thanks Bear.

[Jeff Verdegan]

matt love wrote:If Number is an abstract class, why does the following print the affirmative?

Because an object IS-AN instance of every one of its superclasses and of every interface that it implements and that its superclasses implement.

Is the int being boxed to an Integer?

Yup. If it weren't being boxed to something, you'd get a compile-time error on the n = assignment. And what else would it be boxed to if not an Integer?