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method overloading and passed arguments

 
Greenhorn
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Hello,
I'm preparing for SCJP 5 and have doubt about overloading methods.
I tried to compile this code:

public class Main {
public static void test(int... a){System.out.println("int array");}
public static void test(Number... a){System.out.println("Number");}

public static void main(String[] args) {
test(new byte[]{2,3});
}
}


and i got compile time error: cannot find symbol: method test(byte[])

I expected that the result would be:int array. Can someone explain me why is this happened.

Nancy
 
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There is a compile time error as an byte[] cannot be assigned to int[]. They are both sub classes of Object and are siblings i.e. they are not parent child of one another.



As you might know, that object references can be assigned to each other only if they have a parent child relationship. This is not the case here so it is giving you an error.
 
nancy nant
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Thank you Ankit!!!
 
author
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Ankit -

That is some seriously good ascii art!

- Bert
 
Greenhorn
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You can pass a byte when you are expecting an int because bytes can be promoted to ints, but you cant pass an array of bytes when you expect an array of ints.
 
Ankit Garg
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Originally posted by Bert Bates:
Ankit -

That is some seriously good ascii art!

- Bert



Thanks Bert. That is a very big complement for me!
 
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