WEBVTT 00:01.430 --> 00:02.030 Hi everyone. 00:02.030 --> 00:03.380 Welcome back to this tutorial. 00:03.380 --> 00:09.920 In this tutorial we will code and explore the instant class that is part of the Java dot time package. 00:09.920 --> 00:18.380 Until now, we have seen different ways of representing the time using date, month, years, hours, 00:18.410 --> 00:20.180 minutes and seconds. 00:20.210 --> 00:24.200 All of these are nothing but a human readable format. 00:24.230 --> 00:31.520 Instant is a class which is part of the Java Time package, which is used to represent the time in a 00:31.520 --> 00:33.500 machine readable format. 00:33.530 --> 00:37.430 Basically it represents the time as a huge number. 00:37.550 --> 00:39.950 How do you create an object of instant? 00:40.430 --> 00:46.010 There is a handy method called now to create an object of instant. 00:46.040 --> 00:54.530 The now method represents the number of seconds from the first second of Jan zero one, 1970, which 00:54.530 --> 00:58.970 is otherwise called as epoch to the current time of this machine. 00:58.970 --> 01:03.720 Let's go ahead and explore using some of the code examples in this tutorial. 01:04.330 --> 01:05.650 At the College Open. 01:05.660 --> 01:10.460 What I'm going to do, I'm going to create a class called Instant Example. 01:13.010 --> 01:17.330 And then I'm going to make this class executable by adding public static void main method. 01:18.170 --> 01:18.800 There we go. 01:18.830 --> 01:22.130 Let's create the instance of instant. 01:23.370 --> 01:28.290 Not now that this is going to give you let me put this in presentation mode. 01:30.910 --> 01:37.930 So this is going to give you the current time of this machine, but it is represented in the form of 01:37.930 --> 01:38.710 seconds. 01:39.370 --> 01:40.690 I'm going to do instant. 01:42.230 --> 01:43.130 An instant. 01:44.720 --> 01:50.480 But if I try to print it, basically it is going to print as if like a date and time. 01:51.770 --> 01:58.940 Because the two string method of instance is going to give you the time in the form of human readable 01:58.940 --> 01:59.390 format. 01:59.390 --> 02:03.980 But behind the scenes it is going to represent the time in a big number. 02:03.980 --> 02:05.450 I will explain you that in a moment. 02:05.450 --> 02:07.070 For now, let's print this and check. 02:07.070 --> 02:07.970 What does it print? 02:11.650 --> 02:15.130 If you take a look at it, it printed the result in a human readable format. 02:15.160 --> 02:17.620 It looks like it has a date and time, right? 02:17.650 --> 02:22.120 Let's go ahead and explore some of the methods that are part of the instant object. 02:22.960 --> 02:24.850 We do instant dot. 02:25.950 --> 02:32.820 There are no methods like get date, get month and get time and stuff like that. 02:32.820 --> 02:37.680 It just has two methods, which is nothing but get nano and get epoch second. 02:37.710 --> 02:40.260 Let's go ahead and print this one and check the value. 02:44.330 --> 02:47.780 Now copy this and put it inside the shirt. 02:48.350 --> 02:49.220 Let's print this. 02:52.730 --> 02:53.100 Well run. 02:53.150 --> 02:54.890 This will check the result. 02:54.920 --> 02:55.310 Now. 02:56.770 --> 02:57.480 But take a look at it. 02:57.490 --> 03:02.650 This is the one which represents the actual current machine's time. 03:02.650 --> 03:03.430 So. 03:04.250 --> 03:07.610 As I mentioned in the presentation, Jan first. 03:10.300 --> 03:11.620 1970. 03:13.140 --> 03:21.660 The skull epoch and each and every day has 86,400 seconds. 03:22.690 --> 03:23.290 Okay. 03:24.710 --> 03:28.820 Each and every day has 86,400 seconds. 03:28.850 --> 03:37.580 The first second of Jan first, 1970, which represents the value as zero from that point to this point. 03:37.610 --> 03:40.270 How many seconds that is this value. 03:40.340 --> 03:49.130 So the current machine's time is 2018, zero 719, and the time is ten, 14 and four zero. 03:49.250 --> 03:49.970 Right. 03:49.970 --> 03:55.160 And then let's go ahead and check the instant dot off method. 03:55.160 --> 03:57.380 There is a handy off method. 03:59.760 --> 04:02.940 And I'm going to pass zero as a value. 04:03.460 --> 04:05.230 They pass the zero as a value. 04:05.250 --> 04:07.910 This is going to give me the time as this one. 04:07.920 --> 04:13.530 Let's go ahead and check that because that is the first second which represents. 04:14.100 --> 04:14.790 The epic. 04:17.540 --> 04:18.740 Run this example. 04:22.060 --> 04:22.690 Take a look at it. 04:22.690 --> 04:24.190 It represents 19 04:24.190 --> 04:30.520 0101000000Z. 04:30.910 --> 04:31.330 So. 04:32.750 --> 04:35.720 This is the starting of the epoch. 04:36.550 --> 04:39.550 Now, let's say you have another instance. 04:40.830 --> 04:43.560 Of instant, instant, instant. 04:43.560 --> 04:44.910 1 or 2. 04:45.270 --> 04:46.440 Instant dot. 04:51.280 --> 04:57.160 If you want to find the difference between these two instant, this instant and this instant, there 04:57.160 --> 05:02.920 is a handy method called duration, which we used for the local time and local date time. 05:02.920 --> 05:03.190 Right? 05:03.190 --> 05:04.680 You can use the same thing here. 05:04.690 --> 05:07.690 Duration dot between. 05:08.470 --> 05:09.370 Instant. 05:11.030 --> 05:12.560 Comma, instant one. 05:14.090 --> 05:20.660 This is going to give you the difference between them and it is going to give you the duration as a 05:20.660 --> 05:21.620 response. 05:23.670 --> 05:25.440 Now what we are going to do. 05:26.540 --> 05:33.230 We're going to get the duration and represent that in nano form because there is not much difference 05:33.230 --> 05:35.750 between these two time instances. 05:35.750 --> 05:35.990 Right? 05:35.990 --> 05:40.400 Because this is created at line number ten and this is created at line number 18. 05:40.430 --> 05:43.340 The time difference between them is going to be very, very minimal. 05:43.340 --> 05:47.210 So in order to show some value, I'm going to represent that in nanoseconds. 05:48.420 --> 05:50.400 Gonna have difference here. 05:52.510 --> 05:54.670 Let's run this example and check the result. 05:57.120 --> 05:57.700 There you go. 05:57.720 --> 06:03.900 It gave you the time difference between these two instances as a nanosecond. 06:04.200 --> 06:07.200 So this is all about instant, which you have to know. 06:07.230 --> 06:13.080 The fundamental thing is instant is used to represent the time in a machine readable format. 06:13.800 --> 06:15.570 With this, we came to the end of this tutorial.