Java具有每日记账功能的简易日历程序

好的，我可以为你提供一个简单的Java日历程序，它可以记录每日收支并生成日历图表。以下是程序代码：

import java.util.Scanner;

public class CalendarApp {
    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();

        // 计算该月份的天数
        int daysInMonth = getDaysInMonth(year, month);

        // 打印日历头部
        System.out.println(" 日 一 二 三 四 五 六");

        // 记录每日收支
        int[] incomes = new int[daysInMonth];
        int[] expenses = new int[daysInMonth];

        for (int day = 1; day <= daysInMonth; day++) {
            // 打印空格
            for (int i = 1; i < day; i++) {
                System.out.print("   ");
            }

            // 打印日期
            System.out.printf("%2d ", day);

            // 输入当日收支
            System.out.print("收支：");
            int income = scanner.nextInt();
            incomes[day - 1] = income;

            System.out.print("支出：");
            int expense = scanner.nextInt();
            expenses[day - 1] = expense;
        }

        // 打印每日收支表格
        System.out.println("\n每日收支:");
        System.out.println("日期\t收入\t支出\t余额");

        int balance = 0;
        for (int i = 0; i < daysInMonth; i++) {
            balance += incomes[i];
            balance -= expenses[i];
            System.out.printf("%d\t%d\t%d\t%d\n", i + 1, incomes[i], expenses[i], balance);
        }
    }

    // 获取指定月份的天数
    public static int getDaysInMonth(int year, int month) {
        int daysInMonth;

        if (month == 2) {
            if (((year % 4 == 0) && !(year % 100 == 0)) || (year % 400 == 0)) {
                daysInMonth = 29;
            } else {
                daysInMonth = 28;
            }
        } else if (month == 4 || month == 6 || month == 9 || month == 11) {
            daysInMonth = 30;
        } else {
            daysInMonth = 31;
        }

        return daysInMonth;
    }
}

你可以根据需要进行修改和扩展。