volatile long

A question on the use of volatile in a concurrent environment. 
Consider the example:

public class  Foo {
    private volatile int count;

     public void run() {
        count++; 
        // ... do some other operations
        count--;
    }
     public int getCount() { return count; }
}

My understanding is:

1) The value returned by getCount() will never be less than zero; and 
2) count will never be in a corrupted state.

Does the above 2 statements still hold if count is type long instead of int ?

Hanson