AutoBoxing

[Balaji Bang]

package boxing;
public class Boxing {
	public static void main(String[] args) {
	Integer i = 10;
	int k = 10;
	method(i,k);
	}
	static void method(int i,Integer k){
	System.out.println("int,Integer called");
	}
	static void method(int i,int k){
	System.out.println("int,int called");;
	}
	static void method(Integer i,Integer k){
	System.out.println("Integer,Integer called");;
	}
	
	}

//Fails To Compile

Why Autoboxing is not done here???

[Balu Sadhasivam]

Do you expect the method (Integer , Integer) to be called ?

[Rafael Angarita]

Compiler error: The method method(int i,Integer k) is ambiguous for the type Boxing()

The problem here is that more that one method match the invocation.

Anyway, I'm waiting for an explanation.

Does this kind of question appear in the real exam? (I'm confused here)

[Balu Sadhasivam]

//Fails To Compile

Why Autoboxing is not done here???

It fails because of AutoBoxing.Otherwise it would have thrown nosuch method error. as there is no method (Integer,int)

[Ruben Soto]

Rafael Angarita wrote:Compiler error: The method method(int i,Integer k) is ambiguous for the type Boxing()

The problem here is that more that one method match the invocation.

Anyway, I'm waiting for an explanation.

Does this kind of question appear in the real exam? (I'm confused here)

All three methods require boxing/unboxing, so if you have any 2 of those methods declared you will get a compiler error on the method invocation.