如何获取当前日期时间 - 日期()和日历()

Question

我希望从当前日期开始的小时和分钟将是2016年10月10日结束的日子

package com.mkyong.date;

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

public class DateDifferentExample
{
    public static void main(String[] args)
    {
        DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
        //get current date time with Date()
        Date date = new Date();
        System.out.println(dateFormat.format(date));
        //get current date time with Calendar()
        Calendar cal = Calendar.getInstance();
        System.out.println(dateFormat.format(cal.getTime()));
        String dateStart = "01/14/2012 09:29:58";
        String dateStop = "01/15/2012 10:31:48";
        //HH converts hour in 24 hours format (0-23), day calculation
        SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
        Date d1 = null;
        Date d2 = null;
        try
        {
            d1 = format.parse(dateStart);
            d2 = format.parse(dateStop);
            //in milliseconds
            long diff = d2.getTime() - d1.getTime();
            long diffSeconds = diff / 1000 % 60;
            long diffMinutes = diff / (60 * 1000) % 60;
            long diffHours = diff / (60 * 60 * 1000) % 24;
            long diffDays = diff / (24 * 60 * 60 * 1000);
            System.out.print(diffDays + " days, ");
            System.out.print(diffHours + " hours, ");
            System.out.print(diffMinutes + " minutes, ");
            System.out.print(diffSeconds + " seconds.");
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
}

结果:

2016/08/15 18:54:03
2016/08/15 18:54:03
1097 Days1 Hours 1 Minute 50 Second 
My want to result for example :
100 days 5 hours 2 minutes 

Answer 1

public Final void set(intyear,intmonth,intdate) - Calendar类的此方法可用于设置日期。

public Final void set(intyear,intmonth,intdate,inthourOfDay,intmin,intsecond)也可以用来设置时间。

Calendar.getInstance()默认设置当前日期和时间。`