我怎么写这个方法？

Question

我实际上正在尝试创建一个闹钟，但我对如何编写此方法有些困惑，这是迄今为止的方向和内容。/*** Formats the time one of the following ways:* "It is the top-of-the-hour" (if the minutes is 0)* "It is half-past the hour" (if the minutes is 30)* "It is 23 minutes past the hour" (if the minutes is more than 0 and less than 30; use the correct number* of minutes here (23 is just an example)* "It is 10 minutes before the hour" (if the minutes is more than 30 and less than 60; use the correct number* of minutes here (10 is just an example)** @precondition clock != null* @postcondition none** @param clock the clock to format* @return a string as described above*/public String formatMinutesInConversationalTone(AlarmClock clock) {    if (clock == null) {        throw new IllegalArgumentException("clock cannot be null");    }    if (clock.getMinutes() == 0) {        return "It is the top-of-the-hour";    }    if(clock.getMinutes() == 30) {    return "it is half past the hour";    }    if(clock.getMinutes() > 0 && clock.getMinutes() < 30) {    }}

Answer 1

我会对小时之前和之后的分钟使用不同的条件，并用于String.format创建这些字符串：

public String formatMinutesInConversationalTone(AlarmClock clock) {

    if (clock == null) {

        throw new IllegalArgumentException("clock cannot be null");

    }

    int minutes = clock.getMinutes();

    if (minutes == 0) {

        return "It is the top-of-the-hour";

    }

    if (minutes == 30) {

        return "It is half past the hour";

    }

    if (minutes < 30) {

        return String.format("It is %d minutes past the hour", minutes);

    }

    return String.format("It is %d minutes before the hour", (60 - minutes));

}