用switch语句编写月份天数java

好的，我可以回答这个问题。以下是使用 switch 语句编写月份天数的 Java 代码：

import java.util.Scanner;

public class MonthDays {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.print("请输入月份：");
        int month = input.nextInt();
        int days = ;
        switch (month) {
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                days = 31;
                break;
            case 4:
            case 6:
            case 9:
            case 11:
                days = 30;
                break;
            case 2:
                System.out.print("请输入年份：");
                int year = input.nextInt();
                if ((year % 4 ==  && year % 100 != ) || year % 400 == ) {
                    days = 29;
                } else {
                    days = 28;
                }
                break;
            default:
                System.out.println("输入的月份有误！");
                break;
        }
        if (days != ) {
            System.out.println(month + "月有" + days + "天。");
        }
    }
}

希望能对您有所帮助！