How to use withZone method of Clock class | Java 8 Date and Time

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ClockDemo.java

import java.time.Clock;
import java.time.ZoneId;

public class ClockDemo
{

    public static void main(String[] args)
    {
        Clock clock1 = Clock.systemDefaultZone();
        System.out.println("clock1 = " + clock1.instant());

        /*
         * Parameters:
         *
         * zone - the time-zone to change to, not null
         *
         * Returns:
         *
         * a clock based on this clock with the specified time-zone,
         * not null
         */
        Clock clock2 = clock1.withZone(ZoneId.systemDefault());
        System.out.println("clock2 = " + clock2.instant());
    }

}

Output

clock1 = 2018-02-13T04:24:13.638Z
clock2 = 2018-02-13T04:24:32.123Z

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/ClockDemo_withzone.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ClockDemo_withzone

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/f479c67d9d2a797db17daef3132e32f3fda78b25/BasicJava/ClockDemo_withzone/?at=master

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How to use tickSeconds method of Clock class | Java 8 Date and Time

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https://www.youtube.com/watch?v=_MTT2I2Jouk&list=UUhwKlOVR041tngjerWxVccw

ClockDemo.java

import java.time.Clock;
import java.time.ZoneId;

public class ClockDemo
{

    public static void main(String[] args)
    {
        Clock clock1 = Clock.systemDefaultZone();
        System.out.println("clock1 = " + clock1.instant());

        /*
         * Parameters:
         *
         * zone - the time-zone to use to convert the instant to
         * date-time, not null
         *
         * Returns:
         *
         * a clock that ticks in whole seconds using the specified
         * zone, not null
         */
        Clock clock2 = Clock.tickSeconds(ZoneId.systemDefault());
        System.out.println("clock2 = " + clock2.instant());
    }

}

Output

clock1 = 2018-02-13T04:12:24.569Z
clock2 = 2018-02-13T04:12:40Z

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/ClockDemo_tickseconds.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ClockDemo_tickseconds

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/f479c67d9d2a797db17daef3132e32f3fda78b25/BasicJava/ClockDemo_tickseconds/?at=master

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Java 8 Clock Class | Java 8 Date and Time | Java Date and Time - Playlist

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How to use tickMinutes method of Clock class | Java 8 Date and Time

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https://www.youtube.com/watch?v=ILHMBS39y-g&list=UUhwKlOVR041tngjerWxVccw

ClockDemo.java

import java.time.Clock;
import java.time.ZoneId;

public class ClockDemo
{

    public static void main(String[] args)
    {
        Clock clock1 = Clock.systemDefaultZone();
        System.out.println("clock1 = " + clock1.instant());

        /*
         * Parameters:
         *
         * zone - the time-zone to use to convert the instant to
         * date-time, not null
         *
         * Returns:
         *
         * a clock that ticks in whole minutes using the
         * specified zone, not null
         */
        Clock clock2 = Clock.tickMinutes(ZoneId.systemDefault());
        System.out.println("clock2 = " + clock2.instant());
    }

}

Output

clock1 = 2018-02-13T04:01:38.294Z
clock2 = 2018-02-13T04:01:00Z

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/ClockDemo_tickminutes.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ClockDemo_tickminutes

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/f479c67d9d2a797db17daef3132e32f3fda78b25/BasicJava/ClockDemo_tickminutes/?at=master

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How to use tick method of Clock class | Java 8 Date and Time

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ClockDemo.java

import java.time.Clock;
import java.time.Duration;

public class ClockDemo
{

    public static void main(String[] args)
    {
        Clock baseClock = Clock.systemUTC();
        System.out.println("instant of baseClock = " + baseClock.instant());

        Duration tickDuration = Duration.ofDays(300);
        System.out.println("tickDuration = " + tickDuration);

        /*
         * Parameters:
         *
         * baseClock - the base clock to base the ticking clock on,
         * not null
         *
         * tickDuration - the duration of each visible tick, not
         * negative, not null
         *
         * Returns:
         *
         * a clock that ticks in whole units of the duration,
         * not null
         */

        Clock clock = Clock.tick(baseClock, tickDuration);

        System.out.println("instant of clock     = " + clock.instant());
    }

}

Output

instant of baseClock = 2018-02-13T03:41:00.886Z
tickDuration = PT7200H
instant of clock     = 2017-08-22T00:00:00Z

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/ClockDemo_tick_duration.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ClockDemo_tick_duration

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/1e79a72b731c44149257d4c3aece211de3cbaa86/BasicJava/ClockDemo_tick_duration/?at=master

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How to use offset method of Clock class | Java 8 Date and Time

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https://www.youtube.com/watch?v=PZGCY8EiHPU&list=UUhwKlOVR041tngjerWxVccw

ClockDemo.java

import java.time.Clock;
import java.time.Duration;

public class ClockDemo
{

    public static void main(String[] args)
    {
        Clock baseClock = Clock.systemUTC();
        System.out.println("instant of baseClock = " + baseClock.instant());

        Duration duration = Duration.ofHours(6);
        System.out.println("duration = " + duration);

        /*
         * Parameters:
         *
         * baseClock - the base clock to add the duration to, not null
         * offset
         *
         * Duration - the duration to add, not null
         *
         * Returns:
         *
         * a clock based on the base clock with the duration added,
         * not null
         */

        Clock clock = Clock.offset(baseClock, duration);
        System.out.println("instant of clock     = " + clock.instant());
    }

}

Output

instant of baseClock = 2018-02-13T03:22:38.254Z
duration = PT6H
instant of clock     = 2018-02-13T09:23:36.572Z

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/ClockDemo_offset_duration.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ClockDemo_offset_duration

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/1e79a72b731c44149257d4c3aece211de3cbaa86/BasicJava/ClockDemo_offset_duration/?at=master

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How to use millis method of Clock class | Java 8 Date and Time

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https://www.youtube.com/watch?v=o1_-1EA-_mE&list=UUhwKlOVR041tngjerWxVccw

ClockDemo.java

import java.time.Clock;

public class ClockDemo
{

    public static void main(String[] args)
    {
        Clock clock = Clock.systemDefaultZone();
        System.out.println("clock = " + clock);

        /*
         * Returns:
         *
         * the current millisecond instant from this clock, measured
         * from the Java epoch of 1970-01-01T00:00Z (UTC), not null
         */
        long millis = clock.millis();
        System.out.println("Clock millis = " + millis);
    }

}

Output

clock = SystemClock[Asia/Calcutta]
Clock millis = 1518409712509

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/ClockDemo_millis.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ClockDemo_millis

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/1e79a72b731c44149257d4c3aece211de3cbaa86/BasicJava/ClockDemo_millis/?at=master

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Java 8 Clock Class Introduction | Java 8 Date and Time | Java Date and Time

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Click the below Image to Enlarge

Java 8 Clock Class Introduction | Java 8 Date and Time | Java Date and Time

ClockDemo1.java

import java.time.Clock;
import java.time.ZoneId;

public class ClockDemo1
{

    public static void main(String[] args)
    {
        /*
         * Returns:
         *
         * a clock that uses the best available system clock in the
         * default zone, not null
         */
        Clock clock = Clock.systemDefaultZone();
        System.out.println("clock = "+clock);

        /*
         * Returns:
         *
         * the time-zone being used to interpret instants, not null
         */
        ZoneId zoneId = clock.getZone();
        System.out.println("zoneId = "+zoneId);
    }

}

Output

clock = SystemClock[Asia/Calcutta]
zoneId = Asia/Calcutta

ClockDemo2.java

import java.time.Clock;
import java.time.Instant;

public class ClockDemo2
{

    public static void main(String[] args)
    {
        /*
         * Returns:
         *
         * a clock that uses the best available system clock in the
         * UTC zone, not null
         */
        Clock clock = Clock.systemUTC();
        System.out.println("clock = "+clock);
        /*
         * Returns:
         *
         * the current instant from this clock, not null
         */
        Instant instant = clock.instant();     
        System.out.println("instant = "+instant);
    }

}

Output

clock = SystemClock[Z]
instant = 2018-02-12T04:17:39.294Z

ClockDemo3.java

import java.time.Clock;
import java.time.ZoneId;

public class ClockDemo3
{

    public static void main(String[] args)
    {

        ZoneId zoneId = ZoneId.systemDefault();
        System.out.println("zoneId = " + zoneId);

        /*
         * Parameters:
         *
         * zone - the time-zone to use to convert the instant to
         * date-time, not null
         *
         * Returns:
         *
         * a clock that uses the best available system clock in the
         * specified zone, not null
         */
        Clock clock = Clock.system(zoneId);
        System.out.println("Clock = " + clock);
    }

}

Output

zoneId = Asia/Calcutta
Clock = SystemClock[Asia/Calcutta]

Refer: 
https://docs.oracle.com/javase/8/docs/api/index.html?java/time/Clock.html

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/ClockDemo_intro.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ClockDemo_intro

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/1e79a72b731c44149257d4c3aece211de3cbaa86/BasicJava/ClockDemo_intro/?at=master

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How to use ofLocal, ofStrict methods of ZonedDateTime Class | Java 8 Date and Time

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https://www.youtube.com/watch?v=5g9U4j0dbFI&list=UUhwKlOVR041tngjerWxVccw

ZoneDateTimeDemo1.java

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;

public class ZoneDateTimeDemo1
{

    public static void main(String[] args)
    {
        LocalDateTime localDateTime = LocalDateTime.now();
        System.out.println(localDateTime);

        ZoneId zoneId = ZoneId.systemDefault();
        System.out.println(zoneId);

        ZoneOffset zoneOffSet = ZoneOffset.UTC;
        System.out.println(zoneOffSet);

        /*
         * Parameters:
         *
         * localDateTime - the local date-time, not null
         *
         * zone - the time-zone, not null
         *
         * preferredOffset - the zone offset, null if no preference
         *
         * Returns:
         *
         * the zoned date-time, not null
         */
        ZonedDateTime zonedDateTime = ZonedDateTime.ofLocal(localDateTime,
                zoneId, zoneOffSet);
        System.out.println(zonedDateTime);

    }

}

Output

2018-02-11T09:52:38.932
Asia/Calcutta
Z
2018-02-11T09:52:38.932+05:30[Asia/Calcutta]

ZoneDateTimeDemo2.java

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;

public class ZoneDateTimeDemo2
{

    public static void main(String[] args)
    {
        LocalDateTime localDateTime = LocalDateTime.now();
        System.out.println(localDateTime);

        ZoneId zoneId = ZoneId.of("Z");
        System.out.println(zoneId);

        ZoneOffset zoneOffSet = ZoneOffset.UTC;
        System.out.println(zoneOffSet);

        /*
         * Parameters:
         *
         * localDateTime - the local date-time, not null
         *
         * offset - the zone offset, not null
         *
         * zone - the time-zone, not null
         *
         * Returns:
         *
         * the zoned date-time, not null
         *
         */

        ZonedDateTime zonedDateTime = ZonedDateTime.ofStrict(localDateTime,
                zoneOffSet, zoneId);
        System.out.println(zonedDateTime);
    }

}

Output

2018-02-11T09:52:49.746
Z
Z
2018-02-11T09:52:49.746Z

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/ZoneDateTimeDemo_ofLocal_strict.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ZoneDateTimeDemo_ofLocal_strict

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/1e79a72b731c44149257d4c3aece211de3cbaa86/BasicJava/ZoneDateTimeDemo_ofLocal_strict/?at=master

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How to use ofInstant methods of ZonedDateTime Class | Java 8 Date and Time

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https://www.youtube.com/watch?v=BLNn_AtZvXU&list=UUhwKlOVR041tngjerWxVccw

ZoneDateTimeDemo1.java

import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class ZoneDateTimeDemo1
{

    public static void main(String[] args)
    {
        Instant instant = Instant.now();
        System.out.println(instant);

        ZoneId zoneId = ZoneId.systemDefault();
        System.out.println(zoneId);

        /*
         *
         * Obtains an instance of ZonedDateTime from an Instant.
         *
         * Parameters:
         *
         * instant - the instant to create the date-time from, not
         * null
         *
         * zone - the time-zone, not null
         *
         * Returns:
         *
         * the zoned date-time, not null
         */
        ZonedDateTime zonedDateTime = ZonedDateTime.ofInstant(instant, zoneId);
        System.out.println(zonedDateTime);

    }

}

Output

2018-02-11T04:05:47.632Z
Asia/Calcutta
2018-02-11T09:35:47.632+05:30[Asia/Calcutta]

ZoneDateTimeDemo2.java

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;

public class ZoneDateTimeDemo2
{

    public static void main(String[] args)
    {

        LocalDateTime localDateTime = LocalDateTime.now();
        System.out.println(localDateTime);

        ZoneOffset zoneOffset = ZoneOffset.UTC;
        System.out.println(zoneOffset);

        ZoneId zoneId = ZoneId.systemDefault();
        System.out.println(zoneId);

        /*
         * Parameters:
         *
         * localDateTime - the local date-time, not null
         *
         * offset - the zone offset, not null
         *
         * zone - the time-zone, not null
         *
         * Returns:
         *
         * the zoned date-time, not null
         *
         */

        ZonedDateTime zonedDateTime = ZonedDateTime.ofInstant(localDateTime,
                zoneOffset, zoneId);
        System.out.println(zonedDateTime);
    }

}

Output

2018-02-11T09:35:59.355
Z
Asia/Calcutta
2018-02-11T15:05:59.355+05:30[Asia/Calcutta]

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/ZoneDateTimeDemo_ofInstant_methods.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ZoneDateTimeDemo_ofInstant_methods

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/f479c67d9d2a797db17daef3132e32f3fda78b25/BasicJava/ZoneDateTimeDemo_ofInstant_methods/?at=master

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How to use of methods of ZonedDateTime Class | Java 8 Date and Time

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ZoneDateTimeDemo1.java

import java.time.ZoneId;
import java.time.ZonedDateTime;

public class ZoneDateTimeDemo1
{

    public static void main(String[] args)
    {

        /*
         * Parameters:
         *
         * year - the year to represent, from MIN_YEAR to MAX_YEAR
         *
         * month - the month-of-year to represent, from 1 (January) to
         * 12 (December)
         *
         * dayOfMonth - the day-of-month to represent, from 1 to 31
         *
         * hour - the hour-of-day to represent, from 0 to 23
         *
         * minute - the minute-of-hour to represent, from 0 to 59
         *
         * second - the second-of-minute to represent, from 0 to 59
         *
         * nanoOfSecond - the nano-of-second to represent, from 0 to
         * 999,999,999
         *
         * zone - the time-zone, not null
         *
         * Returns: the offset date-time, not null
         *
         */

        ZonedDateTime zonedDateTime = ZonedDateTime.of(2018, 2, 3, 6, 30, 40,
                50000, ZoneId.systemDefault());
        System.out.println(zonedDateTime);

    }

}

Output

2018-02-03T06:30:40.000050+05:30[Asia/Calcutta]

ZoneDateTimeDemo2.java

import java.time.LocalDate;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class ZoneDateTimeDemo2
{

    public static void main(String[] args)
    {

        LocalDate localDate = LocalDate.parse("2017-02-03");
        LocalTime localTime = LocalTime.parse("12:30:30");

        /*
         * Parameters:
         *
         * date - the local date, not null
         *
         * time - the local time, not null
         *
         * zone - the time-zone, not null
         *
         * Returns:
         *
         * the offset date-time, not null
         *
         */
       
        ZonedDateTime zonedDateTime = ZonedDateTime.of(localDate, localTime,ZoneId.systemDefault());
        System.out.println(zonedDateTime);

    }

}

Output

2017-02-03T12:30:30+05:30[Asia/Calcutta]

ZoneDateTimeDemo3.java

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class ZoneDateTimeDemo3
{

    public static void main(String[] args)
    {

        LocalDateTime localDateTime = LocalDateTime.now();

        /*
         * Parameters:
         *
         * localDateTime - the local date-time, not null
         *
         * zone - the time-zone, not null
         *
         * Returns:
         *
         * the zoned date-time, not null
         */
        ZonedDateTime zonedDateTime = ZonedDateTime.of(localDateTime,
                ZoneId.systemDefault());
        System.out.println(zonedDateTime);

    }

}

Output

2018-02-09T09:59:31.014+05:30[Asia/Calcutta]

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/ZoneDateTimeDemo_of_methods.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ZoneDateTimeDemo_of_methods

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/1bca0230c22240afa29522b797f3f11c5a905b74/BasicJava/ZoneDateTimeDemo_of_methods/?at=master

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