小编Pat*_*tel的帖子

我有两个功能。第一个：

public String getWeekDay(int day) {
    switch (day) {
        case 1:
            return "Monday";
        case 2:
            return "Tuesday";
        case 3:
            return "Wednesday";
        case 4:
            return "Thursday";
        case 5:
            return "Friday";
        case 6:
            return "Saturday";
        case 7:
            return "Sunday";
        default:
            throw new InvalidOperationException("day must be in range 1 to 7");
    }
}

第二个：

public String getWeekDay(int day) {
    if ((day < 1) || (day > 7)) throw new InvalidOperationException("day must be in range 1 to 7");
    String[] days = {"Monday", "Tuesday", "Wednesday", …