java万年历实现代码怎么写

以下是一个简单的Java万年历实现代码：

import java.util.Scanner;


public class CalendarProgram {

    public static void main(String[] args) {
    
        Scanner scanner = new Scanner(System.in);
    

        System.out.print("请输入年份：");
    
        int year = scanner.nextInt();
    
        System.out.print("请输入月份：");
    
        int month = scanner.nextInt();
    

        printCalendar(year, month);
    

        scanner.close();

    }


    public static void printCalendar(int year, int month) {
    
        int daysInMonth = getDaysInMonth(year, month);
    
        int startDayOfWeek = getStartDayOfWeek(year, month);
    

        System.out.println("日\t一\t二\t三\t四\t五\t六");
    

        for (int i = 0;
     i  startDayOfWeek;
 i++) {
    
            System.out.print("\t");

        }
    

        for (int day = 1;
     day = daysInMonth;
 day++) {
    
            System.out.print(day + "\t");


            if ((day + startDayOfWeek) % 7 == 0) {
    
                System.out.println();

            }

        }

    }


    public static int getDaysInMonth(int year, int month) {

        int[] daysInMonth = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
    ;
    

        if (month == 2 &
    &
 isLeapYear(year)) {
    
            return 29;

        }
    

        return daysInMonth[month - 1];

    }


    public static int getStartDayOfWeek(int year, int month) {
    
        int totalDays = 0;
    

        for (int y = 1900;
     y  year;
 y++) {
    
            totalDays += isLeapYear(y) ? 366 : 365;

        }
    

        for (int m = 1;
     m  month;
 m++) {
    
            totalDays += getDaysInMonth(year, m);

        }
    

        return (totalDays + 1) % 7;

    }


    public static boolean isLeapYear(int year) {
    
        return year % 400 == 0 || (year % 4 == 0 &
    &
     year % 100 != 0);

    }

}
    

这个代码实现了一个简单的万年历程序。用户可以输入年份和月份，然后程序会打印出对应的日历。程序使用了getDaysInMonth()函数来计算每个月的天数，getStartDayOfWeek()函数来计算每个月的第一天是星期几，isLeapYear()函数来判断是否是闰年。最后，printCalendar()函数根据上述计算结果打印出日历。

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