Queue intQueue = new LinkedList();
intQueue.add(1);
intQueue.add(3);
intQueue.add(5);
int top = intQueue.peek();
//top is 1
int first = intQueue.poll();
//first is 1
int second = intQueue.poll();
//second is 3
int third = intQueue.poll();
//third is 5
Queue intQueue = new LinkedList();
intQueue.add(1);
intQueue.add(3);
intQueue.add(5);
int top = intQueue.peek(); //top is 1 int first = intQueue.poll(); //first is 1 int second = intQueue.poll(); //second is 3 int third = intQueue.poll(); //third is 5