Gradle execute java code

Building Java Applications Sample

This guide demonstrates how to create a Java application with Gradle using gradle init . You can follow the guide step-by-step to create a new project from scratch or download the complete sample project using the links above.

What you’ll build

You’ll generate a Java application that follows Gradle’s conventions.

What you’ll need

• A text editor or IDE — for example IntelliJ IDEA
• A Java Development Kit (JDK), version 8 or higher — for example AdoptOpenJDK
• The latest Gradle distribution

Create a project folder

Gradle comes with a built-in task, called init , that initializes a new Gradle project in an empty folder. The init task uses the (also built-in) wrapper task to create a Gradle wrapper script, gradlew .

The first step is to create a folder for the new project and change directory into it.

Run the init task

From inside the new project directory, run the init task using the following command in a terminal: gradle init . When prompted, select the 2: application project type and 3: Java as implementation language. Next you can choose the DSL for writing buildscripts — 1 : Groovy or 2: Kotlin . For the other questions, press enter to use the default values.

The output will look like this:

$ gradle init Select type of project to generate: 1: basic 2: application 3: library 4: Gradle plugin Enter selection (default: basic) [1..4] 2 Select implementation language: 1: C++ 2: Groovy 3: Java 4: Kotlin 5: Scala 6: Swift Enter selection (default: Java) [1..6] 3 Select build script DSL: 1: Groovy 2: Kotlin Enter selection (default: Groovy) [1..2] 1 Select test framework: 1: JUnit 4 2: TestNG 3: Spock 4: JUnit Jupiter Enter selection (default: JUnit 4) [1..4] Project name (default: demo): Source package (default: demo): BUILD SUCCESSFUL 2 actionable tasks: 2 executed

The init task generates the new project with the following structure:

├── gradle (1) │ └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew (2) ├── gradlew.bat (2) ├── settings.gradle.kts (3) └── app ├── build.gradle.kts (4) └── src ├── main │ └── java (5) │ └── demo │ └── App.java └── test └── java (6) └── demo └── AppTest.java

├── gradle (1) │ └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew (2) ├── gradlew.bat (2) ├── settings.gradle (3) └── app ├── build.gradle (4) └── src ├── main │ └── java (5) │ └── demo │ └── App.java └── test └── java (6) └── demo └── AppTest.java

1	Generated folder for wrapper files
2	Gradle wrapper start scripts
3	Settings file to define build name and subprojects
4	Build script of app project
5	Default Java source folder
6	Default Java test source folder

You now have the project setup to build a Java application.

Review the project files

The settings.gradle(.kts) file has two interesting lines:

rootProject.name = "demo" include("app")

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Gradle execute java code

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