Why does this method call on a null object run without a NullPointerException? [duplicate]

Question

What is the reason for the output? I know it prints Hello World but don’t know why as it should give NullPointerException.

public class Null
{
    public static void greet()
    {
        System.out.println("Hello World");

    }
    public static void main(String[] args)
    {
        ((Null)null).greet();
    }
}

Answer 1

This is because greet()is a static method. So

((Null)null).greet();

is equivalent to,

Null.greet()

Answer 2

Since greet is a static method, a class instance is not needed (and not used...) to invoke it.

The ((Null)null) expression doesn't dereference null, it simply serves as a type definition used to access the static method.