运用java编写一个方法，计算你出生的那一天是星期几?并显示从出生到现在每年过生日那天的星期数

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相关问题

编写一个java方法，计算你出生的那一天是星期几?并显示从出生到现在每年过生日那天的星期数

以下是一个计算出生日期星期数和每年生日星期数的Java方法：

import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;

public class BirthdayCalculator {
    
    public static void main(String[] args) {
        String birthday = "1995-07-15"; // 修改为你自己的出生日期
        calculateBirthdayWeekday(birthday);
    }
    
    public static void calculateBirthdayWeekday(String birthday) {
        LocalDate birthdate = LocalDate.parse(birthday, DateTimeFormatter.ISO_LOCAL_DATE);
        DayOfWeek birthWeekday = birthdate.getDayOfWeek();
        System.out.println("你出生的那一天是星期" + birthWeekday.getValue());
        
        LocalDate today = LocalDate.now();
        int years = today.getYear() - birthdate.getYear();
        System.out.println("从出生到现在，每年过生日那天的星期数：");
        for (int i = 0; i <= years; i++) {
            LocalDate birthdayThisYear = birthdate.plusYears(i);
            DayOfWeek birthdayWeekday = birthdayThisYear.getDayOfWeek();
            System.out.println("第" + (i+1) + "年：" + birthdayWeekday.getValue());
        }
    }
}

该方法首先将生日字符串解析为`LocalDate`对象，然后计算出生日那天是星期几，并输出结果。

接着，它计算从出生到当前时刻的年数，并使用`plusYears()`方法来计算每年过生日那天的日期。对于每个生日日期，它计算星期数并将其输出到控制台。

注意，该方法使用了Java 8中的`java.time`包，因此需要使用Java 8或更高版本。

编写一个方法，计算你出生的那一天是星期几？并显示距离现在几天，用Scanner和

Calendar类实现。

可以参考以下代码：

import java.util.Calendar;
import java.util.Scanner;

public class Birthday {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入你的出生年份：");
        int year = scanner.nextInt();
        System.out.println("请输入你的出生月份：");
        int month = scanner.nextInt() - 1; // Calendar中月份从0开始
        System.out.println("请输入你的出生日期：");
        int day = scanner.nextInt();

        Calendar birthday = Calendar.getInstance();
        birthday.set(year, month, day);
        int dayOfWeek = birthday.get(Calendar.DAY_OF_WEEK);
        String[] daysOfWeek = {"", "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};
        System.out.println("你的生日是：" + daysOfWeek[dayOfWeek]);

        Calendar now = Calendar.getInstance();
        long days = (now.getTimeInMillis() - birthday.getTimeInMillis()) / (24 * 60 * 60 * 1000);
        System.out.println("距离现在已经过去了 " + days + " 天。");
    }
}

运行程序后，按照提示输入出生年月日即可看到结果。