Question

I am relatively new to Java.
I came across this statement while going through an example

((Integer)arg).intValue()

Can anybody explain this expression?

Answer 1

Assuming arg is an Object, it is being cast to an Integer so that the primitive int value can be obtained using the intValue() method available on Integer.

In Java 5 and above, autoboxing could be utilized to simplify this to:

int x = (Integer)arg;