Can't resolve method className()

Question

I can't figure out why i have an error on this piece of code. Any suggestion?

Thanks

public class HelloWorld {

  public static void main(String[] args) {

    int choice = 2;

    choice.className().getName();

  }
}

Can you explain what you are trying to do? – Mike Gorski Jan 18 '16 at 12:58 — Mike Gorski, Jan 18 '16 at 12:58

score 3 · Answer 1 · answered Jan 18 '16 at 11:42

3

You Cannot invoke className() on primitive type

answered Jan 18 '16 at 11:42

hasnae

2,137
17
21

So, how do i check that "choice" is actually an int ? – aurel_lab Jan 18 '16 at 11:44
you can either use Integer.parseInt(). Or if you want to use class name, use wrapper instead (Integer) and choice.getClass().getName() – hasnae Jan 18 '16 at 11:49

Abdelhak · Answer 2 · 2016-01-18T11:49:50.463

2

You can't, because primitives are not objects.

If the fully-qualified name of a class is available, it is possible to get the corresponding Class using the static method Class.forName(). This cannot be used for primitive types.

edited Jan 18 '16 at 11:49

answered Jan 18 '16 at 11:44

Abdelhak

8,299
4
22
36

score 1 · Answer 3 · answered Feb 19 '21 at 06:36

1

You can't determine primitive variable data type like that way. code should be like below.

public class HelloWorld {
  public static void main(String[] args) {
    int choice = 2;
    String type = ((Object)choice).getClass().getName();
  }
}

answered Feb 19 '21 at 06:36

Mishan Madhupa

421
4
5

score 0 · Answer 4 · answered Feb 19 '21 at 06:49

0

You can't because it is of primitive type, but you can use Integer instead and to check if it belongs to specific object you can use

Object temp = 1;
if(temp  instanceof Integer){
 System.out.println("Integer Object");
}

answered Feb 19 '21 at 06:49

Usman Nazir

106
1
6

Can't resolve method className()

4 Answers4