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Hi everyone, welcome back. In this lecture we are going to be writing a similar functionality

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but we are going to be exploring the coding assistant which is our github copilot that we

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have installed and we are going to use the coding assistant to write the similar code for us because

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the coding assistants are on the rise and all the organizations today are recommending the developers

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to start leveraging these tools to improve the productivity and also using these tools the right

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way will benefit you in many ways and using the wrong way is not going to benefit you in many ways

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so in this course i'll walk you through what are the ways that we can use these tools in the

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correct way that can benefit the developers i don't have the whole course updated with the

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github copilot assistant but whatever new lectures all the java 25 features that we are going to

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explore we are going to leverage the copilot assistant now what i'm going to do is there are

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different modes available here so number one is the ask mode number two is the agent mode number

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three is a edit mode ask mode is something which you can chat and interact with like how you can

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do it with chat cpt so now what i'm going to do is i'm going to ask can you write a simple java

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program using the compact main functionality that's introduced in java 25 okay so then i'm

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going to press enter so this is not going to edit the source code files this is going to just give

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you the program for you so that you can take this program and then put this in your class file as

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you can see so here is a simple java program using the compact main functionality introduced in java

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25 and you can see that it gave me this code whatever we wrote right so it took us like

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probably uh three to five minutes to write this code and explain the code but here you go you have

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the code readily available within a few seconds so this is the beauty of these copilot ai coding

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assistant tools but one thing we need to make sure is that we need to ask the right question so that

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you will get the right answer and the model that i'm using is that clarkson at 4.5 and what i did

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was i went ahead and subscribed for the github copilot pro license which is 10 dollars per month

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that's the reason why i have access to all these models i'm using the clarkson at 4.5 this is the

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latest and greatest model at the time of recording this lecture if you're using a free tier you might

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be having access to 3.5 or something like that or the 4.1 version so use the latest model that's

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available to you but using the premium models is what is going to give you the right code because

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java 25 is one of the latest feature if you use the older model it might not have knowledge about

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the java 25 features at all so it's better to use the latest and greatest model so this is the ask

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mode so what i'm going to do is i'm going to look into the edit mode so in the edit mode what i'm

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going to do let me copy the prompt over here copy it over here and then click on the edit mode i'm

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going to ask can you introduce a variable named course and then print it in the console okay and

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then you need to add the files where you want to edit to happen so select the simple hello hold

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there you go we have the simple hello world selected and then send when you do this what

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this is going to do is this is going to go ahead and edit the file for you as you can see it added

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the course name as modern java and then printed that value in the console so now it has this

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changes being made as a user of the coding assistant we are the developers we need to

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accept this change or discard this change when you accept this change this is going to be basically

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making the code available in the class if you discard the change then it will automatically

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remove the change now i'm going to execute this particular class and as you can see the class is

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getting executed there you go so we have the course value as modern java now let's take a look

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at the agent mode agent mode is something which is an advanced mode which can go ahead and create the

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class for you which can also create the functions variables whatnot whatever you ask it to do

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it will actually do it for you but you need to be really clear about what you want the agent to do

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otherwise it will try to do something which you do not expect it to do so what i'm going to do is

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i'm going to copy the same thing over here and place it over here so i'm going to be telling

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that create a simple java program using the compact main and make sure you have the latest

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model here i'm selecting the clotson at 4.5 and here i'm going to ask it to do the new class name

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should be simple hello world one or i can say v1 okay so you need to be explicit about what you want

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the agent to do otherwise it will do some random things which is not expected so i'm going to press

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enter okay so it created a class named simple hello world v1 right so it is actually over here

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and you can see that it added bunch of things over here right so you didn't ask it to do it but still

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it went ahead and added all these different things so now i'm going to accept it all and then show

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you what it means so it basically took some of the examples that we did in the simple hello world

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class and also it added what is the benefit of the compact main feature so it has the no class

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declaration needed no public static modifiers required and simplified io dot main method

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and top level instance variables are allowed it also showed the traditional system dot out dot

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printer and syntax and also it created the function for you so basically we didn't ask it to do all

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of these things but it did went ahead and made those changes so now we can actually ask it hey

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it looks like you made more changes than what i expected can you just have the first four lines

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of println okay and then you can tell it to remove all the other code and then press enter so you can

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see that the simple hello world v1 is the one which is being referenced now it went ahead and

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removed all the changes for you okay so you can see that it edited the file perfect i have

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simplified the code it says that now it just has the three instance variable at the top and the

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main function with only the first four println statements now we accept this change and you do

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the accept all there you go you have the simplified compact main function readily available the code

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is completely written by the copilot assistant so this is one of the benefit of using these

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a assistant tools what it can do is that it can help you learn the new features faster and you

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don't have to write the code the basic code from scratch you can use the assistant to write for you

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another thing is that you can actually highlight the code and ask and interact with the assistant

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directly from the code itself so you can actually select this you can say like what is the benefit

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of using this over system.out.println it will also give you thoughts of why using io.println

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instead of system.out.println can provide benefits such as abstraction easier testing and flexibility

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and also using different models will give you different answer but using the latest model

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always gives you the best answer as far as i can think of because the newer models are

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continuously better in reasoning they are really better in latest and greatest training data so i'm

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going to ask the same question what is the benefit of io.println over system.out.println

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so you see that right using io.println over system.out.println provides several benefits

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cleaner syntax simplified imports consistency with modern java to also talk about the simplified java

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features designed to reduce ceremony of simple programs testing flexibility feature proof so this

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model gave me the right answer when i used a 4.1 it gave an answer but it is not a great answer

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so this is also another feature when you install this copilot assistant you can directly highlight

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the code and you can ask it to explain what that code is it will be able to provide you a answer

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and you can actually read through it and get an understanding on it with this we came to the end

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of this lecture i hope you all had fun coding the compact main functionality completely using the

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copilot assistant these copilot assistants are going to stay and this is going to be the feature

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which all the organizations are going to push the developers to get comfortable with

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if you're not going to be comfortable using these tools i'm really sorry to say that you'll be left

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out and the companies will continuously going to enforce this tools to be used in your day-to-day

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development this marks the end of this lecture thank you for watching