java - 在java中使用For循环减少代码重复

Question

    for (Aircraft aircraft : landingQueue) {
        if (aircraft.hasEmergency()) {
            return aircraft;
        }
    }

    for (Aircraft aircraft : landingQueue) {
        if (aircraft.getFuelPercentRemaining() <= 20) {
            return aircraft;
        }
    }

    for (Aircraft aircraft : landingQueue) {
        if (aircraft instanceof PassengerAircraft) {
            return aircraft;
        }
    }
    return landingQueue.get(0);

因此，我的程序会遍历队列中的飞机列表，并根据任务的重要性返回一架飞机。例如，它会首先检查landingQueue ArrayList，看看是否有飞机处于紧急状态，如果找不到飞机，那么它会检查燃油少于20的飞机，依此类推。有没有一种简单的方法可以减少for循环和if语句的重复？非常感谢

Answer 1

另一种方法可能是根据您的优先级标准对列表进行排序

public Aircraft returnOneBasedOnImportance(){
    Comparator<Aircraft> byEmer = Comparator.comparing(a -> !a.hasEmergency());
    Comparator<Aircraft> byFuel = Comparator.comparing(a -> !(a.getFuelPercentRemaining() <= 20));
    Comparator<Aircraft> byType = Comparator.comparing(a -> !(a instanceof PassengerAircraft));

    return landingQueue.stream()
                       .sorted(byEmer.thenComparing(byFuel).thenComparing(byType))
                       .findFirst().get();
}