About Question enthuware.ocpjp.v7.2.1736 :

[rocky_bgta]

if I change the declaration as:

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int a = 10;
		Integer[] aa = { 10, 20 };
		long l = 30;

		probe(a);
		probe(aa);
		probe(l); 

it produce output as:
In Integer
In Integer..
In Long

but my question is why probe(aa) print: In Integer..
while it can also print: In Object
as

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int[]aa = {10, 20} 

declaration because

Code: Select all

Integer[]aa

"aa" is also object.

[admin]

Because the parameter that matches more precisely is the one that is selected. aa does match Object but it matches more closely to Integer[].
You will read about it in explanations of other questions where this concept is tested.
HTH,
Paul.