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what is the result of compiling & executing. doSomething(null,null);

 
Ranch Hand
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Consider the following code . what is the result of compiling & executing C.java ?

class A { }

class B extends A { }

class C extends B {
static void doSomething ( A x , A y ) {System.out.print("AA");}
static void doSomething ( A x , B y ) {System.out.print("AB");}
static void doSomething ( B x , A y ) {System.out.print("BA");}
static void doSomething ( B x , B y ) {System.out.print("BB");}
static void doSomething ( C x , C y ) { System.out.println("CC");}

public static void main(String[] args) {
doSomething(null,null);
}
}

Options :

a . Prints AA to the console
b . Prints AB to the console
c . Prints BA to the console
d . Prints BB to the console
e . Prints CC to the console

The correct answer is e

Can anyone explain me.
 
Ranch Hand
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Hi..

I saw you had another such question too...
Where do you get this questions from...Is SCJP really so tricky...
 
Greenhorn
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My guess is ... The lowest in the Inheritance hierarchy is selected. i.e. method using C object type as the parameter is selected first.

Any comments?
 
Sheriff
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See What is a most-specific method? from our SCJP FAQ.
 
Consider Paul's rocket mass heater.
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