java写日历用一维数组

下面是使用一维数组来实现日历的Java代码：

import java.util.Scanner;

public class Calendar {
    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();

        // 计算该月的天数
        int days = getDaysOfMonth(year, month);

        // 计算该月第一天是星期几
        int firstDayOfWeek = getFirstDayOfWeek(year, month);

        // 输出日历
        printCalendar(year, month, days, firstDayOfWeek);
    }

    // 获取指定年份月份的天数
    public static int getDaysOfMonth(int year, int month) {
        int[] daysOfMonth = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
        if (isLeapYear(year) && month == 2) {
            return 29;
        }
        return daysOfMonth[month - 1];
    }

    // 判断是否闰年
    public static boolean isLeapYear(int year) {
        return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0;
    }

    // 获取指定年份月份的第一天是星期几
    public static int getFirstDayOfWeek(int year, int month) {
        int day = 1;
        int[] monthTable = {6, 2, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4};
        int century = year / 100;
        int yearOfCentury = year % 100;
        int firstDayOfWeek = (yearOfCentury + yearOfCentury / 4 + century / 4 - 2 * century + monthTable[month - 1] + day) % 7;
        if (firstDayOfWeek < 0) {
            firstDayOfWeek += 7;
        }
        return firstDayOfWeek;
    }

    // 输出日历
    public static void printCalendar(int year, int month, int days, int firstDayOfWeek) {
        String[] weekDays = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};

        // 打印标题
        System.out.println("      " + month + "月 " + year);
        for (String weekDay : weekDays) {
            System.out.printf("%3s", weekDay);
        }
        System.out.println();

        // 打印空格
        for (int i = 0; i < firstDayOfWeek; i++) {
            System.out.print("   ");
        }

        // 打印日期
        for (int i = 1; i <= days; i++) {
            System.out.printf("%3d", i);
            if ((firstDayOfWeek + i) % 7 == 0) {
                System.out.println();
            }
        }
    }
}

这个程序会提示用户输入年份和月份，然后计算并打印出对应月份的日历。其中，getDaysOfMonth()方法用来获取指定年份月份的天数，isLeapYear()方法用来判断是否为闰年，getFirstDayOfWeek()方法用来获取指定年份月份的第一天是星期几，printCalendar()方法用来输出日历