What will happen if i compile the foll code:
import java.util.*;
publicclass Gen
{
publicstaticvoid main(Strring [] ar)
{
Collection<Integer> arr=new ArrayList<Integer>();
ArrayList<Integer> arr1=new ArrayList<Integer>();
//[i] some elements are added [/i]
if(arrinstanceof Collection<Integer>)System.out.println("is an instance");
}
}
The only person who can tell what will happen if you compile something is in fact you. So I suggest you compile that and see what happens.
yeah am just asking u people.
i know most of the will go wrong. (^ _ ~)
OK fine. can anyone tell me why we get a compile time error on the following line:
if(arr instanceof Collection<Integer>)
null
> OK fine. can anyone tell me why we get a compile time
> error on the following line:
It wont throw error !!!!
> if(arr instanceof Collection<Integer>)
>
>
>
> null
Well it wont throw error mate ?
> What will happen if i compile the foll code:
> > import java.util.*;
> public class Gen
> {
> public static void main(Strring [] ar)
> {
> Collection<Integer> arr=new ArrayList<Integer>();
> ArrayList<Integer> arr1=new ArrayList<Integer>();
> /[i] some elements are added [/i]
> if(arr instanceof
> Collection<Integer>)System.out.println("is an
> instance");
>
>
> }
> }
>
The only error I see is
public static void main([b]Strring[/b] [] ar)
ok . that is not Strring . its String .
was in a hurry.
btw i got a compile time error with the same line but dont know why.
what does the error say? anything more than "i refuse to compile this line"?
Generic type information is not available at runtime (when you're using the instanceof operator). Make itif (arr instanceof Collection) ...
