메소드 오버로딩 예제 - 시분초

Method overloading practice

Udemy - JavaMasterClass by Tim Buchalka

• minutes 인자와 seconds 인자를 받는 getDurationString이라는 메소드를 만든다.
• 첫번째 인자가 0보다 크거나 같음을 확인한다.
• 두번째 인자가 0보다 크거나 같음을 확인한다.
• 위 조건을 통과하지 못하면 “Invalid value” 메세지를 돌려준다.
• 인자가 위 조건을 충족하면 시분초를 나타내는 다음의 포맷을 가진 문자열을 돌려준다. “HH MM SS”

-Source :
https://www.udemy.com/user/learn-programming-academy/

나의 답안

public class Main {

    public static void main(String[] args) {
        System.out.println(getDurationString(65,45));
        System.out.println(getDurationString(3945));
        System.out.println(getDurationString(-41));
        System.out.println(getDurationString(9,9));
    }

    public static String getDurationString (int minutes, int seconds) {
        if (minutes < 0 || seconds < 0 || seconds > 59)
            return "Invalid value";

        return (minutes / 60 + "h " + minutes % 60 + "m " + seconds + "s");
    }

    public static String getDurationString (int seconds) {
        if (seconds < 0)
            return "Invalid value";

        return getDurationString (seconds / 60, seconds % 60);
    }
}

정답

public class Main {

    private static final String INVALID_VALUE_MESSAGE = "Invalid Value";
    public static void main(String[] args) {
        System.out.println(getDurationString(65,45));
        System.out.println(getDurationString(3945L));
        System.out.println(getDurationString(-41));
        System.out.println(getDurationString(9,9));
    }

    private static String getDurationString (long minutes, long seconds) {
        if (minutes < 0 || seconds < 0 || seconds > 59)
            return INVALID_VALUE_MESSAGE;

        long hours = minutes / 60;
        long remainingMinutes = minutes % 60;

        String hoursString = hours + "h";
        if(hours < 10) {
            hoursString = "0" + hoursString;
        }

        String minutesString = remainingMinutes + "m";
        if(remainingMinutes < 10) {
            minutesString = "0" + minutesString;
        }

        String secondsString = seconds + "h";
        if(seconds < 10) {
            secondsString = "0" + secondsString;
        }

        return hoursString + " " + minutesString + " " + secondsString;
    }

    private static String getDurationString (long seconds) {
        if (seconds < 0)
            return INVALID_VALUE_MESSAGE;

        long minutes = seconds / 60;
        long remainingSeconds = seconds % 60;

        return getDurationString (minutes, remainingSeconds);
    }
}