poll java queue code example

Example 1: queue.poll() in java

//prints the head and deletes the head.
q=[10,20,30]
int n=q.poll();//returns 10   q=[20,30]
int m=q.poll();//returns 20   q=[30]

Example 2: queue.isempty java

while (!QUEUE.isEmpty()) {
  QUEUE.remove();
 }