Question

任何人都可以帮助我如何计算DOB的下一个生日剩余天数以及生日，即周一或周二等生日

Answer 1

例如，要获取星期几，您需要输入：

Calendar daymonthyear = Calendar.getInstance();
daymonthyear.set(birthdayYear, birthdayMonth, birthdayDay);
int dayOfTheWeek = daymonthyear.get(Calendar.DAY_OF_WEEK);

编辑：通过简单减去当前日/月/年和生日日/月/年值来获得剩余天数。 但是，请注意不要在公式中留下负值

Answer 2

[更新代码]

添加以下导入：

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;



    final String strBDay = "2014/04/07";//"1990/04/07"; // Next Birtday date
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
    Date dt = null;
    try
    {
        dt = sdf.parse(strBDay);
    }
    catch (final java.text.ParseException e)
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    final Calendar BDay = Calendar.getInstance();
    BDay.setTime(dt);

    final Calendar today = Calendar.getInstance();

    // Result in millis
    final long millis = BDay.getTimeInMillis() - today.getTimeInMillis();

    // Convert to days
    final long days = millis / 86400000; // Precalculated (24 * 60 * 60 * 1000)

    sdf = new SimpleDateFormat("EEEE");
    sdf.format(dt);

    System.out.println("Left days to bday: " + days);
    System.out.println("It will be       : " + days);

输出：

12-14 16：23：08.811：I / System.out（5253）：剩下的日子到星期日：113
12-14 16：23：08.811：I / System.out（5253）：它将是：星期一

[使用D.O.B的版本]

如果你想使用你的出生日期，那就是这样：

    final String strBDay = "1990/04/07";//"1990/04/07"; // Next Birtday date
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
    Date dt = null;
    try
    {
        dt = sdf.parse(strBDay);
    }
    catch (final java.text.ParseException e)
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    final Calendar BDay = Calendar.getInstance();
    BDay.setTime(dt);

    final Calendar today = Calendar.getInstance();

    // Take your DOB Month and compare it to current month
    final int BMonth = BDay.get(Calendar.MONTH);
    final int CMonth = today.get(Calendar.MONTH);
    BDay.set(Calendar.YEAR, today.get(Calendar.YEAR));
    if(BMonth <= CMonth)
    {
        BDay.set(Calendar.YEAR, today.get(Calendar.YEAR) + 1);
    }

    // Result in millis
    final long millis = BDay.getTimeInMillis() - today.getTimeInMillis();

    // Convert to days
    final long days = millis / 86400000; // Precalculated (24 * 60 * 60 * 1000)

    sdf = new SimpleDateFormat("EEEE");
    //final String dayOfTheWeek = sdf.format(BDay.getTime());
    final String dayOfTheWeek = sdf.format(dt);

    System.out.println("Left days to bday: " + days);
    System.out.println("It will be       : " + dayOfTheWeek);

输出：

12-14 16：48：11.801：I / System.out（5342）：剩下的日子到星期日：113
12-14 16：48：11.801：I / System.out（5342）：它将是：星期一

下一个生日和下一个生日的剩余天数

2 个答案: