Java Code Kalkulasi Date Time

run:
Thu Jan 25 00:00:00 ICT 2007 sebelum Fri Jan 26 00:00:00 ICT 2007
Sekarang: Tuesday, 17 January 2017
5 hari yang akan datang: Sunday, 22 January 2017

5 hari yang akan datang: 22
5 hari yang akan datang: 22 January 2017
3 hari yang lalu: 14 January 2017
10 tahun kemudian: 01 January 2030
1,5 jam yang lalu: 31 December 1999 [23:30:0]
17 January 2017 [14:58:44]
17 January 2017 [18:29:14]
BUILD SUCCESSFUL (total time: 0 seconds)

package okdeh;

import java.text.DateFormat;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.Calendar;

public class KalkulasiDateTime {

  public static void main( String[] args ) {

    DateFormat df = new SimpleDateFormat("dd/MM/yyyy");

    try {

Date d1 = df.parse("25/01/2007");

Date d2 = df.parse("26/01/2007");

String s = "";

if (d1.equals(d2)) {

s = "sama dengan";

} else if (d1.before(d2)) {

s = "sebelum";

} else if (d1.after(d2)) {

s = "sesudah";

   }

      System.out.println(d1 + " " + s + ' ' + d2);

 } catch (Exception e) {

  System.err.println(e.toString());

 }

Date now = new Date();

System.out.printf("Sekarang: %tA, %<td %<tB %<tY %n", now);

long l = now.getTime();

// Sekarang ditambah 5 hari

l += 5 * 24 * 60 * 60 * 1000;

System.out.print("5 hari yang akan datang: ");

System.out.printf("%tA, %<td %<tB %<tY %n", new Date(l));

System.out.println();

Calendar cal = Calendar.getInstance();

// Tidak tepat

int tgl = cal.get(Calendar.DAY_OF_MONTH);

System.out.println("5 hari yang akan datang: " + (tgl+5));

// Sekarang ditambah 5 hari

cal.add(Calendar.DATE, 5);

System.out.print("5 hari yang akan datang: ");

System.out.printf("%td %<tB %<tY %n", cal.getTime());

// Set waktu kalender = current time

cal.setTime(new Date());

cal.add(Calendar.DATE, -3);

System.out.print("3 hari yang lalu: ");

System.out.printf("%td %<tB %<tY %n", cal.getTime());

SimpleDateFormat sdf = new SimpleDateFormat("dd MMMM yyyy");

Calendar cal1 = Calendar.getInstance();

// Set tgl sekarang = 01 Januari 2020

cal1.set(2020, 0, 1);

cal1.add(Calendar.YEAR, 10);

System.out.println("10 tahun kemudian: " + sdf.format(cal1.getTime()));

sdf = new SimpleDateFormat("dd MMMM yyyy [H:m:s]");

cal1.set(2000, 0, 1, 1, 0, 0); // 01 Januari 2000 01:00:00

cal1.add(Calendar.MINUTE, -90);

System.out.println("1,5 jam yang lalu: " + sdf.format(cal1.getTime()));

// Output: 31 Desember 1999 [23:30:00]

sdf = new SimpleDateFormat("dd MMMM yyyy [H:m:s]");

cal1.setTime(new Date());

System.out.println(sdf.format(cal1.getTime()));

// 3 jam 30 menit 30 detik kemudian

cal1.add(Calendar.HOUR, 3);

cal1.add(Calendar.MINUTE, 30);

cal1.add(Calendar.SECOND, 30);

System.out.println(sdf.format(cal1.getTime()));

  }

}

REFF:

 * @author Didik Dwi Prasetyo, [didik_rpl at yahoo dot com]