VarArgs

[Saibabaa Pragada]

Hi, Could you please let me know why I am not able to call these methods & how I can call these methods.

public class Question39_VarArgs_SeeQuestion30 {

    static void hello(Integer... i) {
	System.out.println("A");
    }

    static void hello(int... i) {
	System.out.println("B");
    }

    public static void main(String[] args) {
	hello(7); //compile Error: The method hello(Integer[]) is ambiguous for the type Question39_VarArgs_SeeQuestion30
	hello(Integer.valueOf("7"));
    }
}

[Tom Reilly]

I had a similar problem: var-args overloading compiler error: ambiguous and the problem went away when I upgraded to the latest Java version.

[Mohamed Sanaulla]

Tom Reilly wrote:I had a similar problem: var-args overloading compiler error: ambiguous and the problem went away when I upgraded to the latest Java version.

I think both are different issues. In this questions the ambiguity is due to- Either use the int version or to autobox to use the Integer version.

[ankur trapasiya]

Integer... and int... both are considered as arrays and there is no way to compare this two arrays for compiler. so that when it finds any integer parameter passed into method at that compiler checks both version of method if the argument passed can satisfy the requirement and here in this case it finds that both methods are eligible to run so that compiler gets confused which method to call. Therefore it gives ambiguity error......

if there would be Long and Integer parameters in the methods then compiler can easily find out that which method to call because compiler can differentiate them .........