BuiltInQueue.java

package com.sarvesh.javabasics;

import java.util.LinkedList;
import java.util.Queue;

public class BuiltInQueue {
 public static void main(String[] args) {
 Queue<Integer> driveThru = new LinkedList<>();
 
 driveThru.offer(100);
 driveThru.offer(200);
 driveThru.offer(300);
 
 System.out.println("Car at the window: " + driveThru.peek()); 
 System.out.println("Served and left: " + driveThru.poll()); 
 System.out.println("Next car at the window: " + driveThru.peek()); 
 }
}