WEBVTT 00:00.510 --> 00:00.960 Hi everyone. 00:00.960 --> 00:02.460 Welcome back to this tutorial. 00:02.670 --> 00:06.230 In the previous tutorial we discussed the theory part of method reference. 00:06.240 --> 00:12.420 In this tutorial we will code and implement the method reference Using some examples, I'm going to 00:12.420 --> 00:14.040 create a package called. 00:15.580 --> 00:16.750 A third reference. 00:19.050 --> 00:23.460 The first example for method reference is by using the function functional interface. 00:23.730 --> 00:30.870 I'm going to create a class called function method reference. 00:32.890 --> 00:34.960 Sample typo here. 00:34.960 --> 00:36.250 I'm going to change that. 00:38.030 --> 00:38.690 Then. 00:39.570 --> 00:41.190 Let's make this class executable. 00:41.220 --> 00:42.780 Public static, void main. 00:43.590 --> 00:44.160 There we go. 00:44.490 --> 00:48.510 Now, I'm going to use the same example that I showed in the presentation. 00:48.900 --> 00:50.160 Let's make it static. 00:50.920 --> 00:51.520 Function. 00:51.550 --> 00:54.850 This is going to take in a string. 00:57.570 --> 00:59.720 As an input and string as an output. 00:59.730 --> 01:01.140 The function takes two inputs. 01:01.140 --> 01:04.050 One is the input type and second is the output type. 01:04.620 --> 01:06.600 I'm going to name this one first. 01:06.660 --> 01:08.220 Let's code the function. 01:08.250 --> 01:10.200 The name is to. 01:11.770 --> 01:13.270 Her case of lambda. 01:14.710 --> 01:22.000 Equal to basically it is accepting an input and then it performs a uppercase on that input. 01:23.270 --> 01:27.620 You go Now let's check this by passing the input. 01:28.490 --> 01:30.530 Two uppercase lambda dot apply. 01:32.670 --> 01:33.510 Java eight. 01:34.470 --> 01:41.730 If you run, this basically is going to give me the output, but with the uppercase operation on top 01:41.730 --> 01:42.270 of it. 01:42.630 --> 01:43.620 Now. 01:44.370 --> 01:49.920 How do we write the method reference implementation of the same thing? 01:50.930 --> 01:52.670 I'm going to use two uppercase. 01:52.670 --> 01:54.740 I'm going to give a different name. 01:55.430 --> 01:58.340 And then the place of this. 01:59.510 --> 02:01.280 You're going to replace this one with method reference. 02:01.310 --> 02:02.330 We know the syntax. 02:02.690 --> 02:05.960 Class name double colon and then the method name. 02:06.080 --> 02:10.160 So it is class name, double colon and the method name. 02:10.400 --> 02:13.820 See, this is the same implementation as the upper one. 02:14.980 --> 02:16.630 It's a god. 02:18.060 --> 02:20.010 Two uppercase method reference dot apply. 02:20.670 --> 02:22.110 Let's go ahead and run this. 02:23.400 --> 02:23.840 There you go. 02:23.860 --> 02:25.720 Both the output are the same. 02:26.170 --> 02:31.700 Let's see whether IntelliJ is going to help us create these method references. 02:31.720 --> 02:33.900 So click on this lambda expression. 02:33.910 --> 02:34.900 I'm using Mac. 02:34.930 --> 02:38.090 I'm pressing the option Enter key. 02:38.110 --> 02:42.800 As soon as I click that option for Windows, it is Add plus enter as you see in the screen. 02:42.820 --> 02:49.490 As soon as I press those keys, it is giving me this option to replace this lambda with method reference. 02:49.510 --> 02:55.720 As soon as I click it, there you go, It automatically creates a method reference implementation for 02:55.720 --> 02:56.950 the lambda expression. 02:57.190 --> 02:59.170 That's one of the advantages of using IntelliJ. 02:59.440 --> 03:05.410 IntelliJ has the code to convert the lambda expression to the method reference. 03:06.220 --> 03:10.870 This is one of the shortcut which you can use to check whether the lambda expression, whatever you 03:10.870 --> 03:14.590 have in your code is eligible for a method reference or not. 03:14.890 --> 03:20.950 So we have successfully implemented the Lambda expression and the equivalent method reference for that 03:20.950 --> 03:21.400 one. 03:22.180 --> 03:24.110 But thus we came to the end of this tutorial. 03:24.130 --> 03:27.400 Let's take a look at some more examples in the next tutorial. 03:27.790 --> 03:28.150 Thank you for.