Android 가 져 오기 시간 인 스 턴 스 코드

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

/**
 * Created by Administrator on 2017/5/8.
 */
public class GetTime {

  public static void main(String[] args) {
    Date date = new Date();
    System.out.println(date);//Mon May 08 14:27:44 CST 2017
    System.out.println(new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(date));//2017-05-08 02:27:44

    long millis = System.currentTimeMillis();
    System.out.println(millis);//1494224864479
    System.out.println(new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(millis));//2017-05-08 02:27:44

    //yyyy-MM-dd  E  hh:mm:ss.sss
    // - -         : : .  
    System.out.println(new SimpleDateFormat("yyyy-MM-dd E hh:mm:ss.sss").format(date));//2017-05-08     02:27:44.044
    System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.sss").format(date));//2017-05-08 14:27:44.044
    System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date));//2017-05-08 14:27:44
    System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm").format(date));//2017-05-08 14:27
    System.out.println(new SimpleDateFormat().format(date));//17-5-8   2:27 :  

    compareDataToNow("2017-05-03 12:45:00");

    try {
      Date date1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2017-05-03 12:45:00");
      compareToNowDate(date1);
    } catch (ParseException e) {
      e.printStackTrace();
    }

    getWeek();
    getTime1();
    getTime2();
  }


  static void getTime1() {
    long time = System.currentTimeMillis();
    //long now = android.os.SystemClock.uptimeMillis();
    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    Date d1 = new Date(time);
    String t1 = format.format(d1);
    System.out.println("SimpleDateFormat  ===" + t1);//2017-05-08 12:44:10

    SimpleDateFormat f4 = new SimpleDateFormat("   " + "yyyy MM dd  E kk mm ");
    System.out.println("f4======" + f4.format(new Date()));//   2017 05 08      14 15 

    SimpleDateFormat f3 = new SimpleDateFormat("   " + "hh  mm  ");
    System.out.println("f3======" + f3.format(new Date()));//   02  15  

    SimpleDateFormat f2 = new SimpleDateFormat("   " + "kk mm  ");
    System.out.println("f2======" + f2.format(new Date()));//   14 17  
  }

  static void getTime2() {
    Calendar calendar = Calendar.getInstance();
    String created = calendar.get(Calendar.YEAR) + " "
        + (calendar.get(Calendar.MONTH) + 1) + " "// 0  
        + calendar.get(Calendar.DAY_OF_MONTH) + " "
        + calendar.get(Calendar.HOUR_OF_DAY) + " "
        + calendar.get(Calendar.MINUTE) + " " + calendar.get(Calendar.SECOND) + "s";
    System.out.println("Calendar  ====" + created);//  ：2017 5 8 12 33 24s
  }

  static void getWeek() {
    Calendar calendar = Calendar.getInstance();
    int day = calendar.get(Calendar.DAY_OF_WEEK);
    String today = null;
    if (day == 2) {
      today = "Monday";
    } else if (day == 3) {
      today = "Tuesday";
    } else if (day == 4) {
      today = "Wednesday";
    } else if (day == 5) {
      today = "Thursday";
    } else if (day == 6) {
      today = "Friday";
    } else if (day == 7) {
      today = "Saturday";
    } else if (day == 1) {
      today = "Sunday";
    }
    System.out.println("Today is:- " + today);//Today is:- Monday
  }

  //          ：
  static long compareDataToNow(String date) {

    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    Date passDate, nowDate;
    long diff = -100l, days = -100l;

    try {
      passDate = sdf.parse(date);

      String nowStr = sdf.format(new Date());
      nowDate = sdf.parse(nowStr);

      diff = passDate.getTime() - nowDate.getTime();//long     
      days = diff / (1000 * 60 * 60 * 24);
      System.out.println("  ：" + days + " " + " nowDate.getTime()=====" + nowDate.getTime());//-5 
    } catch (ParseException e) {
      e.printStackTrace();
    }
    return diff;
  }

 //          ：
  static long compareToNowDate(Date date) {
    long diff = -100l, days = -100l;

    Date nowDate = new Date();

    diff = date.getTime() - nowDate.getTime();//long     
    days = diff / (1000 * 60 * 60 * 24);
    System.out.println("  ：" + days + " " + " nowDate.getTime()=====" + nowDate.getTime());//-5 

    return diff;
  }
}