用java生日快乐代码 Java生日快乐代码

谁会用java写一下关于生日快乐的,SOS

public class Birthday{

public static void main(String args[]){

System.out.println("凯旋，生日快乐");

}

}

用JAVA编写一个简单的生日提醒器，源代码该怎么写啊？

获取系统时间：

import java.util.*;

import java.text.*;

public class TestDate {

public static void main(String[] args) {

Calendar ca = Calendar.getInstance();

int year = ca.get(Calendar.YEAR);//获取年份

int month=ca.get(Calendar.MONTH);//获取月份

int day=ca.get(Calendar.DATE);//获取日

int minute=ca.get(Calendar.MINUTE);//分

int hour=ca.get(Calendar.HOUR);//小时

int second=ca.get(Calendar.SECOND);//秒

int WeekOfYear = ca.get(Calendar.DAY_OF_WEEK);

}

用系统时间跟生日比较就行了

java编写一个简单的输入生日计算下一个生日时间的代码？

import java.util.Calendar;

import java.util.Scanner;

import java.util.concurrent.TimeUnit;

/**

* Title: Test03.javabr

* Description:

*

* @author 王凯芳

* @date 2020年3月5日 下午6:03:04

* @version 1.0

*

* @request 编写一个方法能计算任何一个人今天离他最近下一次生日还有多少天，然后在主方法(main方法)中输入你的出生年月日，调用该方法的计算结果并输出信息“某某同学离自己最近下一次生日x天”。

*/

public class Test03 {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("请输入你的姓名：");

String name = sc.nextLine();

System.out.println("请输入你的生日，格式为(2000/01/01)：");

String line = sc.nextLine();

String[] strs = line.split("/");

if (strs.length == 3) {

int days = getDays(strs[0], strs[1], strs[2]);

if (days == 0) {

System.out.println(String.format("%s 同学，今天是你的生日，祝你生日快乐(#^.^#)", name, days));

} else {

System.out.println(String.format("%s 同学离自己最近下一次生日%d天。", name, days));

}

} else {

System.out.println("生日输入不正确！请按格式输入。");

}

sc.close();

}

/**

* 获取最近一次生日天数

*

* @param year

* @param month

* @param day

* @return

*/

public static int getDays(String year, String month, String day) {

Calendar now = Calendar.getInstance();

now.set(Calendar.HOUR_OF_DAY, 0);

now.set(Calendar.MINUTE, 0);

now.set(Calendar.SECOND, 0);

now.set(Calendar.MILLISECOND, 0);

int now_year = now.get(Calendar.YEAR);

Calendar birthday = Calendar.getInstance();

birthday.set(Calendar.YEAR, now_year);

birthday.set(Calendar.MONTH, Integer.parseInt(month) - 1);

birthday.set(Calendar.DAY_OF_MONTH, Integer.parseInt(day));

birthday.set(Calendar.HOUR_OF_DAY, 0);

birthday.set(Calendar.MINUTE, 0);

birthday.set(Calendar.SECOND, 0);

birthday.set(Calendar.MILLISECOND, 0);

long diff = now.getTimeInMillis() - birthday.getTimeInMillis();

if (diff == 0) {

return 0;

} else if (diff 0) {

long diffDays = TimeUnit.DAYS.convert(diff, TimeUnit.MILLISECONDS);

return Math.abs((int) diffDays);

} else {

birthday.add(Calendar.YEAR, 1);

long diffMi = birthday.getTimeInMillis() - now.getTimeInMillis();

long diffDays = TimeUnit.DAYS.convert(diffMi, TimeUnit.MILLISECONDS);

return (int) diffDays;

}

}

}