java - 自定义公历月份

Question

如何根据用户的输入实例化日历？我试过:

Calendar cal = new GregorianCalendar(2011, Calendar.t.getMonth(month), 1);

但没有成功。

import java.util.GregorianCalendar;
import java.util.Calendar;
import java.util.Scanner;

public class Test {
    public static void main(String[] args){
        Test t = new Test();
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter a month: ");
        String month = sc.next();

        Calendar cal = new GregorianCalendar(2011, Calendar.JANUARY, 1);

        int days = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
        System.out.print("There are "+days+" days in "+month+".");
    }
    private String getMonth(String month){
        return month;
    }
}

或者更实用的方法？谢谢。

Answer 1

你需要给月份加一，因为它是从 0 而不是 1 开始的:

int month = sc.nextInt();
Calendar cal = new GregorianCalendar(2011, month + 1, 1);

---

或者如果您希望用户插入一个字符串而不是一个数值，那么您可以这样做:

String month = sc.nextLine();
int iMonth = -1;
if(month.equalsIgnoreCase("January"))  iMonth = 0;
else if(month.equalsIgnoreCase("February")) iMonth = 1;
// and so on ...
Calendar cal = new GregorianCalendar(2011, iMonth, 1);