WEBVTT 00:00.320 --> 00:00.890 Hi everyone. 00:00.890 --> 00:02.150 Welcome back to this tutorial. 00:02.150 --> 00:09.440 In this tutorial, we will learn about how to make use of the new Java Time libraries to work with time 00:09.440 --> 00:10.070 zones. 00:10.070 --> 00:17.360 Until now we have seen different examples of date and time, but all of the examples are local date 00:17.360 --> 00:18.110 and time. 00:18.110 --> 00:25.250 Java eight introduced some zone specific date time libraries that will be covering in this tutorial, 00:25.250 --> 00:30.950 such as the zoned date, time zone ID and zone offset. 00:30.980 --> 00:33.620 Let's talk about the zoned date time. 00:33.620 --> 00:40.220 First, it represents the date and time with its associated time zone and offset. 00:40.490 --> 00:45.010 Here is an example of the output of the zoned date time instance. 00:45.020 --> 00:50.930 In general, time zones are categorized by zone offset and zone ID. 00:51.080 --> 00:58.310 If you take a look at the example here, it has the time along with the zone offset and the zone ID 00:58.550 --> 01:08.910 zone offset here is nothing but -0 five colon zero zero zone offset represents the offset time from 01:08.910 --> 01:09.990 the UTC time. 01:12.280 --> 01:15.640 The example here is from my local machine time. 01:15.640 --> 01:21.590 It has the offset value of -five hours from the UTC time. 01:21.610 --> 01:22.990 What is the zone ID? 01:23.140 --> 01:23.950 Zone ID. 01:24.040 --> 01:30.820 This is another unique identifier which can be used to determine the zone to which the time belongs 01:30.820 --> 01:31.300 to. 01:32.930 --> 01:36.740 Let's go ahead and explore the time zones using some examples. 01:36.740 --> 01:38.090 I'm going to go back to the IntelliJ. 01:38.750 --> 01:39.650 There we go. 01:41.960 --> 01:42.980 Let me close this. 01:43.430 --> 01:47.810 I'm going to create a class called zoned Date time Example. 01:48.920 --> 01:53.300 Be zoned date time Example. 01:54.280 --> 01:57.100 Wanna to add the public static void main method here. 01:57.610 --> 01:58.570 There you go. 01:59.430 --> 02:01.060 Gonna put this in presentation mode. 02:01.970 --> 02:02.780 Now. 02:03.640 --> 02:06.700 I'm going to create a zoned date time instance. 02:06.700 --> 02:07.940 How can we create it? 02:07.960 --> 02:13.210 We're going to use the zoned date time class dot now. 02:14.720 --> 02:18.860 And this is going to return me an instance of zoned datetime. 02:18.860 --> 02:20.300 I'm going to give it a name. 02:21.670 --> 02:22.450 Here we go. 02:22.660 --> 02:24.550 Let's print this and check the result. 02:30.100 --> 02:30.750 Monoprint. 02:30.820 --> 02:32.170 Zoned date and time. 02:32.590 --> 02:32.950 We run. 02:32.970 --> 02:35.050 This is going to give me. 02:36.260 --> 02:38.120 The date time. 02:38.240 --> 02:45.710 Along with that, it gave me the offset and the time zone ID to which it belongs to. 02:46.010 --> 02:52.070 How can we get this offset value and the zone ID value from the zoned date time instance? 02:52.340 --> 02:54.530 It has some handy methods in it. 02:54.890 --> 02:56.960 The first thing is I'm going to get. 02:58.140 --> 02:58.800 Zone. 03:00.100 --> 03:00.700 Offset. 03:03.630 --> 03:09.510 So this zoned daytime instance has a method called get offset. 03:09.540 --> 03:15.960 If you give that value, if you call that method, it is going to give you the offset time. 03:18.820 --> 03:21.370 Though the officer time is returned as minus five. 03:21.460 --> 03:30.310 Basically, this gives me my local times zone information and my local time is -five hours from the 03:30.310 --> 03:31.390 UTC time. 03:31.420 --> 03:34.810 Now how can we get this zone ID out of it? 03:35.110 --> 03:41.230 Because we have seen different examples of getting the date, time, year, month, date and all those 03:41.230 --> 03:42.640 things in the prior tutorials. 03:42.640 --> 03:45.930 Now we are going to focus mainly on the zone related information. 03:45.940 --> 03:47.260 How can we get the zone ID? 03:47.650 --> 03:48.190 Again? 03:48.190 --> 03:54.640 It has a handy method called get zone id using which I'm going to give zone date time dot. 03:54.820 --> 03:58.450 If we give get zone, it's going to give you the zone ID. 03:58.480 --> 04:03.340 If you go to the method, it gives you the zone ID as a response. 04:04.630 --> 04:06.730 More on this example and check the result. 04:08.270 --> 04:09.050 To check the result. 04:09.050 --> 04:14.210 It gave you the zone ID as America slash Chicago. 04:14.240 --> 04:19.460 Now let's take a look at what are the different zones it supports. 04:19.490 --> 04:20.120 Right. 04:20.120 --> 04:21.740 So how can we check? 04:21.740 --> 04:24.620 What are the list of available zone IDs? 04:24.980 --> 04:26.750 There is a handy method called. 04:27.790 --> 04:32.440 We have to use the zone ID class dot, get available zone IDs. 04:32.440 --> 04:34.210 I'm just going to print this one. 04:39.210 --> 04:40.620 Available zones. 04:40.620 --> 04:46.350 So this is going to give you the list of zones that this Java API supports. 04:47.320 --> 04:48.070 I'm going to run this. 04:48.070 --> 04:51.370 It's going to give you a lot of zones, actually. 04:52.190 --> 04:57.050 If we take a look at it, it print it printed a lot of information and it is not in a readable format. 04:57.080 --> 05:04.340 What I'm going to do, I'm going to make use of the Frames library to print this data in a readable 05:04.340 --> 05:04.820 format. 05:04.850 --> 05:11.990 Get available zone IDs, dot frame, and then we're going to make use of the for each method, which 05:11.990 --> 05:13.100 is part of the. 05:14.290 --> 05:17.440 Dream, and then I'm going to give. 05:18.800 --> 05:19.370 John. 05:19.580 --> 05:21.620 The Forejt takes in a consumer, right? 05:21.620 --> 05:23.330 And then shuts out. 05:25.170 --> 05:25.500 Zone. 05:28.550 --> 05:30.080 Now I'm going to run this example. 05:30.080 --> 05:33.230 It is going to print the result in a readable format. 05:35.160 --> 05:35.690 There you go. 05:35.700 --> 05:38.790 So these are the different zones it supports. 05:38.790 --> 05:39.930 It's a lot of zones. 05:39.930 --> 05:41.700 I believe the number is 600. 05:41.730 --> 05:42.780 Let's go ahead and check that. 05:42.780 --> 05:47.310 Also, what I'm going to do, I'm going to come on this piece of code. 05:49.960 --> 05:52.780 Let's check how many zones it supports. 05:54.280 --> 05:57.000 I'm going to give number of zones. 05:58.040 --> 06:06.980 And it's going to be zone ID dot get available zone IDs, dot not stream. 06:06.980 --> 06:08.210 It's going to be size. 06:09.110 --> 06:11.090 So this is going to return you a set. 06:11.090 --> 06:13.970 And then we are calling the size method in that set. 06:17.210 --> 06:20.900 So the total number of zones it supports is 600. 06:21.350 --> 06:27.890 Now, in this tutorial, what I'm going to do, I'm going to show you a demo of how to get different 06:27.890 --> 06:29.660 time zones in America. 06:29.660 --> 06:33.440 So basically in America there are four different time zones. 06:33.980 --> 06:34.850 One is east. 06:37.700 --> 06:41.900 DST and CST change this order a little bit. 06:42.680 --> 06:43.460 Going to be. 06:44.930 --> 06:50.360 Este este este and how do you get the time? 06:50.660 --> 06:52.970 So I'm going to give. 06:56.610 --> 07:01.410 Chicago, because Chicago, if you take a look at it, I'm I'm in the zone. 07:01.440 --> 07:04.590 America, Chicago will give you the time. 07:06.630 --> 07:11.550 And then we are going to do zoned date time dot. 07:11.730 --> 07:16.200 Now in here, the now is going to give you the local machines, right? 07:16.200 --> 07:18.680 But I want to pass a zone ID as part of it. 07:18.690 --> 07:23.970 So if you take a look at the now, now has three different versions. 07:23.970 --> 07:27.150 We looked at the now just now method without any parameters. 07:27.150 --> 07:30.060 This is going to give you that machines time zone. 07:30.060 --> 07:35.280 Now we are going to make use of the now method which accepts the zone ID as an input. 07:35.550 --> 07:42.060 So if you go here, zone ID dot off, you pass the string, right? 07:42.060 --> 07:45.180 The string is going to be America slash. 07:46.120 --> 07:46.780 Chicago. 07:47.490 --> 07:50.610 So this will give you the time. 07:51.930 --> 07:52.530 Of the. 07:53.010 --> 07:59.200 So if you take a look at it, it gives it gave you the time of the day and the time is 609. 07:59.220 --> 08:04.680 Now what I want I want the Eastern Time zones, current time for the Eastern Time zone. 08:04.680 --> 08:06.030 I'm going to use Detroit. 08:07.930 --> 08:08.650 Applied. 08:10.330 --> 08:11.170 Going to be. 08:12.660 --> 08:13.950 It right now. 08:13.950 --> 08:15.720 Let's take a look at the time difference here. 08:15.750 --> 08:18.300 Detroit is one hour ahead of CST. 08:20.250 --> 08:25.770 If you take a look out here, it printed the time as 709 and the time is. 08:26.700 --> 08:28.770 6 or 9, to name this one as ist. 08:29.010 --> 08:34.170 Now what I'm going to do, I want to check the Pacific Standard time. 08:34.880 --> 08:37.350 Ist going to be L.A. 08:38.720 --> 08:41.740 I want to keep this colon in sync so that it will be easy to read. 08:42.040 --> 08:45.220 I'm going to give Los Angeles. 08:49.390 --> 08:49.810 Right. 08:50.140 --> 08:51.190 They give the value, right. 08:51.220 --> 08:53.680 Let's go and check this by running this example. 08:55.700 --> 08:57.980 Run this example in Los Angeles. 08:58.010 --> 08:59.720 The current time is. 09:01.020 --> 09:01.890 There is a current time. 09:02.340 --> 09:07.080 The current time is zero four, which is two hours before the CST. 09:07.110 --> 09:19.020 The time is six and the time is seven and time is zero four, which is two hours before the time now. 09:20.180 --> 09:22.550 I'm going to print the time. 09:23.210 --> 09:23.750 Right. 09:23.750 --> 09:25.040 And it's going to be Denver. 09:28.200 --> 09:28.410 Oh. 09:30.420 --> 09:33.360 And I'm going to pass this value as Denver. 09:34.290 --> 09:35.460 Let's go ahead and run this. 09:39.420 --> 09:46.350 Gave you the value as zero five colon 1111 I'm going to use as a benchmark here because since I'm on, 09:46.760 --> 09:48.390 it is easy for me to compare. 09:48.390 --> 09:54.990 If you take a look at it, the time is an hour ahead, an hour before the time. 09:54.990 --> 10:03.210 So using the zoned date time class, you can get the times of that particular time zone. 10:03.390 --> 10:05.100 Time zones, local date and time. 10:05.100 --> 10:06.420 So if you take a look at it. 10:07.080 --> 10:10.410 This one gave you the time of cst's local time. 10:10.410 --> 10:13.710 This one gave you the time of its local time. 10:13.710 --> 10:19.770 This one gave you the time of its local time and this one gave you the time of its local time. 10:19.770 --> 10:23.460 This is advantage of its zoned date time class. 10:23.460 --> 10:30.150 This was never possible with local date and time because it was able to give you only the time of that 10:30.150 --> 10:30.660 machine. 10:30.660 --> 10:36.720 Actually, whenever you call local daytime dot now it is going to give you that machine's local date 10:36.720 --> 10:37.440 and time. 10:37.440 --> 10:44.490 Now we have seen the zone Datetime.now, which takes in the zone ID as an input. 10:44.490 --> 10:44.970 Right? 10:44.970 --> 10:47.790 There is another version which takes in. 10:48.790 --> 10:52.020 Zone date and time dot now, which takes in a clock. 10:52.030 --> 10:52.330 Right? 10:52.330 --> 10:53.930 Let's go ahead and explore that one too. 10:54.130 --> 11:00.490 So I'm going to pass the clock dot system and then I'm going to pass the. 11:01.940 --> 11:03.140 Time zone of this. 11:04.500 --> 11:11.520 This is going to give me again the zoned date and time of this particular zone. 11:11.520 --> 11:16.030 But if you take a look at the instance, it took clock as an input, right? 11:16.170 --> 11:17.010 So I'm going to. 11:19.260 --> 11:20.490 Give it a comment here. 11:21.210 --> 11:22.920 Zoned date time. 11:24.750 --> 11:25.860 Using clock. 11:28.460 --> 11:28.880 Block. 11:30.120 --> 11:31.230 Now the code is not readable. 11:31.230 --> 11:33.270 Now I'm going to copy this and put it here. 11:36.730 --> 11:37.400 There you go. 11:37.420 --> 11:38.620 Let's run this. 11:42.600 --> 11:47.580 If you take a look at the Denver time, the Denver time is 513. 11:47.580 --> 11:50.070 And here the Denver time is also 513. 11:50.070 --> 11:57.570 But this one, we got the zone date and time using the clock as an input to that zone date time dot 11:57.570 --> 11:58.230 now method. 11:58.260 --> 12:04.560 Now let's explore some other approaches of creating a local date time using the time zone. 12:04.830 --> 12:06.330 What I'm going to do. 12:07.710 --> 12:12.630 Until now, we have seen examples like local date time dot now, right? 12:12.630 --> 12:16.200 But if you take a look at it, it accepts something called time zone. 12:16.200 --> 12:17.790 Let's go ahead and explore that. 12:17.820 --> 12:25.230 If you give the zone ID, I'm going to give the zone ID as Detroit and then check what is the local 12:25.230 --> 12:27.630 date time it is going to give as part of it. 12:29.390 --> 12:32.120 Want to give local date time, local date time. 12:32.840 --> 12:33.830 I'm going to print it. 12:39.270 --> 12:40.920 System.out.println. 12:40.920 --> 12:45.060 And in here I'm going to give the Detroit. 12:50.660 --> 12:51.560 And then. 12:53.170 --> 12:54.490 Local daytime. 12:55.410 --> 12:57.700 Want to just print the local daytime and check? 12:59.340 --> 13:06.720 So if we take a look at the time it gave you the local date time of Detroit, but it did not have any 13:06.720 --> 13:09.250 of the time zone related information. 13:09.270 --> 13:14.600 I'll be covering how to convert a local date time to a zoned date time in the next tutorial. 13:14.610 --> 13:21.810 For now, you can get the local date time of that particular zone using the local daytime dot now which 13:21.840 --> 13:25.140 accepts the zone ID as an input. 13:25.930 --> 13:31.090 Now let's explore the another version of it which accepts the clock. 13:32.500 --> 13:34.870 I'm going to give clock Dot. 13:36.410 --> 13:39.500 System which accepts a zone ID as an input. 13:41.640 --> 13:47.940 So again, this is going to be Detroit, but it accepts the clock as an input instead of just zone ID. 13:49.060 --> 13:51.040 Going to print local daytime here. 13:51.490 --> 13:52.840 Let's go ahead and run this one. 13:55.080 --> 13:55.550 There you go. 13:55.560 --> 13:57.870 It gave you the same value as the. 13:58.640 --> 14:01.160 Local date time dot now which accepts the zone ID. 14:01.700 --> 14:08.360 So these are the different ways of creating the local date time using the zone as as an input. 14:08.390 --> 14:15.020 Now what I'm going to do, I'm going to create an instant using the instant I'm going to create the 14:15.020 --> 14:17.840 appropriate zone related information. 14:17.840 --> 14:22.040 So I'm going to use local date time dot of instance. 14:22.040 --> 14:27.380 There is a handy method called off instant to which you will pass the current zones. 14:28.530 --> 14:29.910 The first input to this one. 14:29.910 --> 14:33.750 If you go to the instant method, it accepts the instant and zone ID as an input. 14:33.780 --> 14:35.310 I'm going to do instant. 14:36.450 --> 14:41.820 Dot now, which is going to give me this current machines local date and time and then I'm going to 14:41.820 --> 14:46.950 give zone ID dot there is a system default. 14:46.950 --> 14:49.860 This is going to give you the current machines zone. 14:50.130 --> 14:56.280 And then I'm going to create local daytime instance and local date time two instance. 14:56.280 --> 15:03.600 Basically we are creating a local date time using the off instance method that is part of the local 15:03.600 --> 15:05.250 date time class. 15:06.390 --> 15:08.180 I'm going to give off instant. 15:08.210 --> 15:10.670 It's going to be local date time to. 15:11.410 --> 15:12.940 I'm going to run this example. 15:14.940 --> 15:19.470 But on this example, this will give you this machine's local date and time. 15:19.470 --> 15:25.290 But the method that we have used in order to create the local date time is of instant. 15:25.560 --> 15:30.960 So these are the different methods that you can use if you have any zone related use case. 15:30.960 --> 15:37.140 And this one is really handy using which you can determine the different time zones that Java Library 15:37.140 --> 15:37.620 supports. 15:37.620 --> 15:41.070 Basically, it supports all the time zones throughout the world. 15:42.480 --> 15:44.250 So with this we came to the end of this tutorial. 15:44.250 --> 15:50.550 Let's explore how to convert a local date time and an instant to a zoned date time in the next tutorial. 15:50.640 --> 15:51.660 Thank you for watching.