TimeUtil.java

package com.handsomezhou.futurerecenttimeselect.util;

import java.util.Calendar;

public class TimeUtil {
	public static final int HOUR_PER_DAY = 24; 				//1day=24h
	public static final int MINUTE_PER_HOUR = 60; 			//1h=60min
	public static final int SECOND_PER_MINUTE=60; 			//1min=60s
	public static final int MILLISECOND_PER_SECOND=1000; 	//1s=1000ms
	
	/**
     * {@link Calendar#YEAR}
     * @return
     */
    public static int getYear(){
        Calendar calendar = Calendar.getInstance();
        int year=calendar.get(Calendar.YEAR);
        
        return year;
    }
    

    /**
     * {@link Calendar#MONTH}
     * @return
     */
    public static int getMonth(){
        Calendar calendar = Calendar.getInstance();
        int month=calendar.get(Calendar.MONTH);
        
        return month;
    }
    
    /**
     * {@link Calendar#DAY_OF_MONTH}
     * @return
     */
    public static int getDayOfMonth(){
        Calendar calendar = Calendar.getInstance();
        int dayOfMonth=calendar.get(Calendar.DAY_OF_MONTH);
        
        return dayOfMonth;
    }

    /**
     * {@link Calendar#DAY_OF_YEAR}
     * @return
     */
    public static int getDayOfYear(){
        Calendar calendar = Calendar.getInstance();
        int dayOfYear=calendar.get(Calendar.DAY_OF_YEAR);
        
        return dayOfYear;
    }
    
	/**
	 * {@link Calendar#HOUR_OF_DAY}
	 * @return
	 */
	public static int getHourOfDay(){
		Calendar calendar = Calendar.getInstance();
		int hour_of_day=calendar.get(Calendar.HOUR_OF_DAY);
		
		return hour_of_day;
	}
	
	/**
	 * {@link Calendar#MINUTE}
	 * @return
	 */
	public static int getMinute(){
		Calendar calendar = Calendar.getInstance();
		
		int minute=calendar.get(Calendar.MINUTE);
		
		return minute;
	}

	/**
	 *  Indicating the minute of the day.
	 *  E.g., at 10:04:15.250 PM the {@code TimeUtil#getMinuteOfDay()} is (22*60+04).
	 * @return
	 */
	public static int getMinuteOfDay(){
		int minuteOfDay=(TimeUtil.getHourOfDay()*TimeUtil.MINUTE_PER_HOUR)+TimeUtil.getMinute();
		
		return minuteOfDay;
	}
	
	/**
	 * {@link Calendar#SECOND}
	 * @return
	 */
	public static int getSecond(){
		Calendar calendar = Calendar.getInstance();
		
		int second=calendar.get(Calendar.SECOND);
		
		return second;
	}
	
	/**
	 *  Indicating the second of the day.
	 *  E.g., at 10:04:15.250 PM the {@code TimeUtil#getSecondOfDay()} is (22*60+04)*60+15.
	 * @return
	 */
	public static int getSecondOfDay(){
		int secondOfDay=(TimeUtil.getMinuteOfDay()*TimeUtil.SECOND_PER_MINUTE)+TimeUtil.getSecond();
		
		return secondOfDay;
	}
	
	/**
	 * {@link Calendar#MILLISECOND}
	 * @return
	 */
	public static int getMilliSecond(){
		Calendar calendar = Calendar.getInstance();
		
		int milliSecond=calendar.get(Calendar.MILLISECOND);
		
		return milliSecond;
	}
	
	/**
	 *  Indicating the millisecond of the day.
	 *  E.g., at 10:04:15.250 PM the {@code TimeUtil#getMilliSecondOfDay()} is ((22*60+04)*60+15)*1000+250.
	 * @return
	 */
	public static int getMilliSecondOfDay(){
		int milliSecondOfDay=(TimeUtil.getSecondOfDay()*TimeUtil.MILLISECOND_PER_SECOND)+TimeUtil.getMilliSecond();
		
		return milliSecondOfDay;
	}
}