Java 工作日输入验证

Question

是否有一种“更整洁”的方式来编写这段代码？我是一个追求简单的人，这对我来说似乎有点重复。 (我将天数更改为数字，以便我可以在自己的 if 语句中使用它们，如果有人想知道的话)有什么建议吗？

Scanner scanText = new Scanner(System.in);

System.out.print("Enter Day: ");
String weekday = scanText.nextLine();

int day = 0;

if (weekday.equalsIgnorCase("Monday"))
  day = 1;
else if (weekday.equalsIgnorCase("Tuesday"))
  day = 2;
else if (weekday.equalsIgnorCase("Wednesday"))
  day = 3;
else if (weekday.equalsIgnorCase("Thursday"))
  day = 4;
else if (weekday.equalsIgnorCase("Friday"))
  day = 5;
else if (weekday.equalsIgnorCase("Saturday"))
  day = 6;
else if (weekday.equalsIgnorCase("Sunday"))
  day = 7;
else {
  System.out.print("Error! Invalid day: ");
  weekday = scanText.nextLine();
}

Answer 1

如果您没有使用 JDK 1.8，以下代码可能会对您有所帮助:

     List<String> strDays = Arrays.asList("Monday", "Tuesday", "Wednesday", "Thusday", "Friday", "Saturday", "Sunday" );

     String weekday = scanText.nextLine();

     int day = 0;
     if(strDays.contains(weekday)) {

         day = strDays.indexOf(weekday) + 1;
     } else {
         System.out.print("Error! Invalid day: ");
         weekday = scanText.nextLine();
     }