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Package as JARĪt this point, you know how to write code and run it from IntelliJ IDEA, which is convenient in the development process. When the program has started, the Run tool window opens, where you can review the output and interact with the program. You don't need to worry about the technical aspect because IntelliJ IDEA automatically does all the necessary preparations behind the scenes.Ĭlick the Run icon in the gutter and select Run 'MainKt' or press Ctrl+Shift+F10. IntelliJ IDEA allows you to run applications right from the editor. Let's verify that our program works as expected. Now we have a working code that reads the username from the console, stores it in a read-only variable, and outputs a greeting using the stored value. Press Ctrl+Space to invoke code completion and select the name variable from the list. Place the caret inside the parentheses of the println statement and type "Hello, $". To learn about other available live templates or configure your own, go to Settings/Preferences | Editor | Live Templates | Kotlin. Move the caret to the next line, type sout, and hit Enter. IntelliJ IDEA will suggest to convert rl to readln(). Move the caret to the next line and type val name = rl. Also, the program needs to store the input somewhere. Now that the program asks users for input, provide them with a way to give it. Replace the Hello World! sample with the following code snippet: This function is the entry point of your program. The file only contains the main() function with print statements. In the Project tool window on the left, expand the node named after your project and open the /src/main/kotlin/main.kt file. In this tutorial we are going to start with a simple three-line application that asks the user their name and greets them. Real projects may be very big and contain hundreds of thousands lines of code. In source code, you define what your application will be doing. Source code is the central part of your project.
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If you don't have the necessary JDK on your computer, select Download JDK.Įnable the Add sample code option to create a file with a sample Hello World! application. If the JDK is installed on your computer, but not defined in the IDE, select Add JDK and specify the path to the JDK home directory. Select the Gradle IntelliJ Maven build system.Ĭhoose the Groovy Kotlin language for the build script.įrom the JDK list, select the JDK that you want to use in your project. You will be able to do it later at any time.
Select the Create Git repository checkbox to place the new project under version control. Name your new project and change its location if necessary.
Otherwise, from the main menu, select File | New | Project.įrom the list on the left, select New Project. On the Welcome screen, click New Project. In IntelliJ IDEA, a project helps you organize everything that is necessary for developing your application in a single unit.
To learn how to accomplish the same using other build tools, use the Build tool switcher at the top of the page. The instructions are provided for IntelliJ IDEA build tool. The instructions are provided for Gradle and Groovy as DSL. The instructions are provided for Gradle and Kotlin as DSL. You can choose to build your app with one of the four supported build tools. Write code using the basic coding assistance features. Tutorial: Create your first Kotlin application
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