Printer Queue

import java.util.ArrayDeque;
import java.util.Scanner;

public class PrinterQueue {
    public static void main(String[] args){
        Scanner scanner = new Scanner(System.in);

        String command = scanner.nextLine();
        ArrayDeque<String> queue = new ArrayDeque<>();

        while (!command.equals("print")){
            if(command.equals("cancel")){
                if(queue.isEmpty()){
                    System.out.println("Printer is on standby");
                }else{
                    String cancelled = queue.poll();
                    System.out.println("Canceled " + cancelled);
                }
            } else {
                queue.offer(command);
            }
            command = scanner.nextLine();
        }
        for (String file : queue) {
            System.out.println(file);
        }
    }
}