JAVA问题 不会 等一个解答

Question

请应用枚举类型编写程序，在控制台窗口输出2008年每个月的天数。要求在输出中含有各个月份的英文名称。

Answer 1

import java.util.EnumSet;  
import java.util.Locale;  
  
public class Main {  
    public static void main(String[] args) {  
        for (Month month : Month.values()) {  
            switch (month) {  
                case JANUARY:  
                    System.out.println(month.name() + " has " + month.days() + " days.");  
                    break;  
                case FEBRUARY:  
                    System.out.println(month.name() + " has " + month.days() + " days.");  
                    break;  
                case MARCH:  
                    System.out.println(month.name() + " has " + month.days() + " days.");  
                    break;  
                case APRIL:  
                    System.out.println(month.name() + " has " + month.days() + " days.");  
                    break;  
                case MAY:  
                    System.out.println(month.name() + " has " + month.days() + " days.");  
                    break;  
                case JUNE:  
                    System.out.println(month.name() + " has " + month.days() + " days.");  
                    break;  
                case JULY:  
                    System.out.println(month.name() + " has " + month.days() + " days.");  
                    break;  
                case AUGUST:  
                    System.out.println(month.name() + " has " + month.days() + " days.");  
                    break;  
                case SEPTEMBER:  
                    System.out.println(month.name() + " has " + month.days() + " days.");  
                    break;  
                case OCTOBER:  
                    System.out.println(month.name() + " has " + month.days() + " days.");  
                    break;  
                case NOVEMBER:  
                    System.out.println(month.name() + " has " + month.days() + " days.");  
                    break;  
                case DECEMBER:  
                    System.out.println(month.name() + " has " + month.days() + " days.");  
                    break;  
            }  
        }  
    }  
}  
  
enum Month {  
    JANUARY(31), FEBRUARY(28), MARCH(31), APRIL(30), MAY(31), JUNE(30), JULY(31), AUGUST(31), SEPTEMBER(30), OCTOBER(31), NOVEMBER(30), DECEMBER(31);  
  
    private final int days;  
  
    Month(int days) {  
        this.days = days;  
    }  
  
    public int days() {  
        return days;  
    }  
}