Java variable argument function!

I found an interesting compile time error today. Java allow variable argument function in that case the signature of the function looks something like, 

Class Y {

int func(int ... x)

}

However the function can be invoked as y.func() without any compile time error. That is kind of interesting for language like Java. It invokes the function with an array of integer of size 0. The same function can be overload with not argument at all! However they don't allow empty call if the function is overloaded with two different types of variable arguments.