Why isn't calling a static method by way of an instance an error for the Java compiler?

Question

I\'m sure you all know the behaviour I mean - code such as:

Thread thread = new Thread();
int activeCount = thread.activeCount();

provokes

Answer 1

Likely for the same logical that makes this not an error:

public class X
{
    public static void foo()
    {
    }

    public void bar()
    {
        foo(); // no need to do X.foo();
    }
}