DPE University Training

Gradle Init Exercise

This is a hands-on exercise to go along with the Introduction to Gradle Build Tool for Developers training module. In this exercise you will go over the following:

• Initializing new Gradle project
• Opening a Gradle project in an editor
• Explore Gradle files

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Prerequisites

• JDK 1.8+ and a recent version of Gradle build tool installed
  • https://gradle.org/install/
• A good editor such as IntelliJ IDE
  • https://www.jetbrains.com/idea/download/

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Initialize new Gradle Project

1. Open a terminal and create a folder called lab, then go inside it. Initialize a new Gradle project by running the gradle init command and enter the following responses for the questions:

Note: The questions gradle init asks may differ for different version of Gradle build tool.

• Type of build to generate: application
• Language: Java
• Java version: Execute java -version to find version
• Project name: lab
• Application structure: single application
• Build script DSL: Kotlin
• Test framework: JUnit Jupiter
• Use new APIs?: no

$ gradle init

Select type of build to generate:
  1: Application
  2: Library
  3: Gradle plugin
  4: Basic (build structure only)
Enter selection (default: Application) [1..4] 

Select implementation language:
  1: Java
  2: Kotlin
  3: Groovy
  4: Scala
  5: C++
  6: Swift
Enter selection (default: Java) [1..6] 

Enter target Java version (min: 7, default: 21): 11

Project name (default: lab): 

Select application structure:
  1: Single application project
  2: Application and library project
Enter selection (default: Single application project) [1..2] 

Select build script DSL:
  1: Kotlin
  2: Groovy
Enter selection (default: Kotlin) [1..2] 

Select test framework:
  1: JUnit 4
  2: TestNG
  3: Spock
  4: JUnit Jupiter
Enter selection (default: JUnit Jupiter) [1..4] 

Generate build using new APIs and behavior (some features may change in the next minor release)? (default: no) [yes, no] 

2. Ensure the generated files in the solution directory look as follows:

$ ls -ltr
total 32
drwxr-xr-x  3 adayal  staff    96 May 12 06:35 gradle
-rwxr-xr-x  1 adayal  staff  8070 May 12 06:35 gradlew
-rw-r--r--  1 adayal  staff  2763 May 12 06:35 gradlew.bat
-rw-r--r--  1 adayal  staff   372 May 12 06:38 settings.gradle.kts
drwxr-xr-x  4 adayal  staff   128 May 12 06:38 app

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Open Project in Editor and Explore Files

1. Launch your Editor and open the lab folder

2. Look at the following files:

• settings.gradle.kts
• app/build.gradle.kts
• gradle/wrapper/gradle-wrapper.properties

3. In the app/build.gradle.kts file hover over the mavenCentral() word and notice the help tooltip popup.

4. Notice sample sources and tests have been created:

• app/src/main/java/com/gradle/lab/App.java
• app/src/test/java/com/gradle/lab/AppTest.java

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Solution Reference

If you get stuck you can refer to the solution branch of this repository.