The Project tool window Alt+1 displays the structure of your application and helps you browse the project.
For more information on how to use and configure templates, refer to File templates.
Depending on the type of the file that you create, the IDE inserts initial code and formatting that is expected to be in all files of that type.
This chapter explains the compilation and running of Java application. In this case, the IDE has inserted the package statement and the class declaration. We will write and execute the traditional Hello World program. Together with the file, IntelliJ IDEA has automatically generated some contents for your class. If necessary, change the default project location and click Finish. Name the project, for example: HelloWorld. In this tutorial, we're going to do everything from scratch, so click Next. We're not going to use any additional libraries or frameworks for this tutorial, so click Next.ĭon't create a project from the template. In the next dialog, specify the JDK vendor (for example, OpenJDK), version, change the installation path if required, and click Download.
If you don't have the necessary JDK on your computer, select Download JDK. 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 (for example, /Library/Java/JavaVirtualMachines/jdk-13.0.1.jdk). If the necessary JDK is already defined in IntelliJ IDEA, select it from the Project SDK list. To develop Java applications in IntelliJ IDEA, you need the Java SDK ( JDK). In the New Project wizard, select Java from the list on the left. Otherwise, from the main menu, select File | New Project. If the Welcome screen opens, click New Project. In IntelliJ IDEA, a project helps you organize your source code, tests, libraries that you use, build instructions, and your personal settings in a single unit.
Some manual tweaking however is sometimes required.Prepare a project Create a new Java project While the converter is not fool-proof, it does a pretty decent job of converting most boilerplate code from Java to Kotlin. To use J2K on a file, click Convert Java File to Kotlin File in its context menu or in the Code menu of IntelliJ IDEA. The Kotlin plugin also bundles a Java to Kotlin converter ( J2K) that automatically converts Java files to Kotlin. Use '-release option' for cross-compilation (Java 9 and later) By default, this option is selected. This compiler lets you perform joint compilation of Groovy and Java code using the Eclipse compiler. IntelliJ IDEA comes bundled with the Eclipse compiler. Converting an existing Java file to Kotlin with J2K Eclipse (also known as Eclipse Compiler for Java or ECJ).
You can also open the Kotlin runtime configuration manually from Tools | Kotlin | Configure Kotlin in Project. 2 - Enable Automake when the application is running Press: ctrl + shift + A (For Mac + shift + A ) Type: Registry Find the key. The next step is to decide which modules to configure (if the project has more than one module) and whether you want to add the runtime library to the project or use those provided by the current Kotlin plugin. For a Java project, configure the Kotlin runtime as a Kotlin Java Module. If this is the first time you're adding a Kotlin file to this project, IntelliJ IDEA will prompt you to add the required Kotlin runtime. Adding Kotlin source code to an existing Java projectĪdding a Kotlin file to an existing Java project is pretty much the same.