Removing top of PriorityQueue?

Assume that I am using the PriorityQueue class from Java.util. I want to remove the largest number from the PriorityQueue pq, which we assume is at the head of the queue.

Will the following work?

// 1 
int head = pq.peek();
pq.dequeue(head);

// 2
int head = pq.dequeue(pq.peek());

Would this work the same for non-primitives as well?