Step 1: Install Gradle
Ensure that Gradle is installed on your system.
On Windows
- Download Gradle: Download the latest Gradle distribution from Gradle's official website.
- Extract the Download: Extract the downloaded ZIP file to a directory of your choice.
- Set Environment Variables:
- Open the System Properties window (
Win + Pause
). - Click on "Advanced system settings" and then "Environment Variables".
- Add a new
GRADLE_HOME
variable pointing to the extracted Gradle directory. - Add
%GRADLE_HOME%\bin
to thePATH
variable.
- Open the System Properties window (
On Mac
- Using Homebrew:
brew install gradle
On Linux
- Using SDKMAN:
sdk install gradle
Verify the installation by running:
gradle -v
Step 2: Create a New Gradle Project
Navigate to the directory where you want to create your new Kotlin project and run the following command:
gradle init --type kotlin-application
This command initializes a new Gradle project with Kotlin support.
Step 3: Configure the build.gradle.kts
File
Open the build.gradle.kts
file and configure it to use the latest Kotlin and Gradle versions.
Example build.gradle.kts
:
plugins {
kotlin("jvm") version "1.9.0"
application
}
repositories {
mavenCentral()
}
dependencies {
implementation(kotlin("stdlib"))
testImplementation(kotlin("test"))
}
application {
mainClass.set("com.example.MainKt")
}
tasks.withType<Test> {
useJUnitPlatform()
}
Step 4: Update the Project Structure
Ensure your project structure follows the standard layout for a Kotlin project:
src/
├── main/
│ ├── kotlin/
│ │ └── com/
│ │ └── example/
│ │ └── Main.kt
│ └── resources/
└── test/
├── kotlin/
│ └── com/
│ └── example/
│ └── MainTest.kt
└── resources/
Move your source files to match this structure if necessary.
Step 5: Create a Simple Kotlin Application
Create a simple Kotlin application to test your setup.
Example Main.kt
:
package com.example
fun main() {
println("Hello, Kotlin!")
}
Example MainTest.kt
:
package com.example
import kotlin.test.Test
import kotlin.test.assertEquals
class MainTest {
@Test
fun testMain() {
assertEquals(4, 2 + 2)
}
}
Step 6: Build and Run the Project
Use the following Gradle commands to build and run your project.
Build the Project
gradle build
Run the Application
gradle run
Run the Tests
gradle test
Step 7: Configure Additional Plugins and Settings
Gradle offers a variety of plugins that can enhance your Kotlin project. For example, you might want to add the Kotlin Spring plugin if you're building a Spring application or the Kotlin Android plugin for an Android project.
Example: Adding the Kotlin Spring Plugin
plugins {
kotlin("jvm") version "1.9.0"
kotlin("plugin.spring") version "1.9.0"
application
}
dependencies {
implementation("org.springframework.boot:spring-boot-starter-web")
implementation("org.springframework.boot:spring-boot-starter-thymeleaf")
}
Conclusion
Setting up a Gradle project for Kotlin is straightforward and allows you to leverage the powerful features of both Gradle and Kotlin. By following this guide, you can create a new Kotlin project, configure it with Gradle, and start building your Kotlin applications efficiently.
For more information, refer to the Gradle Kotlin DSL User Guide.
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