Create Java console app

2 minutes to read

Install Java, Gradle on WSL2 (Ubuntu) and VS Code extensions

You can skip this section if you have already setup Java development environment.
Follow this document to install Java, Gradle build tool and VS Code extensions.

Create a new Java console app with Gradle

Open a terminal and execute the following commands to reate a project folder:
```
  mkdir demo
  cd demo
```
Init Java project with Gradle

  gradle init

Then select the following options and press enter to create a new Java application project.

  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
  Split functionality across multiple subprojects?:
    1: no - only one application project
    2: yes - application and library projects
  Enter selection (default: no - only one application project) [1..2] 1
  Select build script DSL:
    1: Groovy
    2: Kotlin
  Enter selection (default: Groovy) [1..2] 1
  Generate build using new APIs and behavior (some features may change in the next minor release)? (default: no) [yes, no]
  Select test framework:
    1: JUnit 4
    2: TestNG
    3: Spock
    4: JUnit Jupiter
  Enter selection (default: JUnit Jupiter) [1..4] 3
  Project name (default: demo):
  Source package (default: demo):

The init task generates the project with the following structure:

  tree .
  ├── app
  │   ├── build.gradle
  │   └── src
  │       ├── main
  │       │   ├── java
  │       │   │   └── demo
  │       │   │       └── App.java
  │       │   └── resources
  │       └── test
  │           ├── groovy
  │           │   └── demo
  │           │       └── AppTest.groovy
  │           └── resources
  ├── gradle
  │   └── wrapper
  │       ├── gradle-wrapper.jar
  │       └── gradle-wrapper.properties
  ├── gradlew
  ├── gradlew.bat
  └── settings.gradle

Run Java console app

Execute the following comand to run the console app
```
  ./gradlew run
```

You will find Hello World! message in a terminal as following:

  > Task :app:run
  Hello World!
  BUILD SUCCESSFUL
  2 actionable tasks: 2 executed

Run a unit test case

Execute the following comand to run a unit test case
```
  ./gradlew test
```

Credit & Useful link

Loading comments...