Gradle

Setup

• Ubuntu 20.04
• Java 14.0.2
• Kotlin 1.4.0
• Gradle 6.6

Kotlin (JVM)

Setup was very simple

gradle init --type kotlin-application

build.gradle.kts

This was the output from the above command

/*
 * This file was generated by the Gradle 'init' task.
 *
 * This generated file contains a sample Kotlin application project to get you started.
 */

plugins {
    // Apply the Kotlin JVM plugin to add support for Kotlin.
    id("org.jetbrains.kotlin.jvm") version "1.3.72"

    // Apply the application plugin to add support for building a CLI application.
    application
}

repositories {
    // Use jcenter for resolving dependencies.
    // You can declare any Maven/Ivy/file repository here.
    jcenter()
}

dependencies {
    // Align versions of all Kotlin components
    implementation(platform("org.jetbrains.kotlin:kotlin-bom"))

    // Use the Kotlin JDK 8 standard library.
    implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")

    // Use the Kotlin test library.
    testImplementation("org.jetbrains.kotlin:kotlin-test")

    // Use the Kotlin JUnit integration.
    testImplementation("org.jetbrains.kotlin:kotlin-test-junit")
}

application {
    // Define the main class for the application.
    mainClassName = "test7.AppKt"
}

File Structure

src
├── main
│   ├── kotlin
│   │   └── test7
│   │       └── App.kt
│   └── resources
└── test
    ├── kotlin
    │   └── test7
    │       └── AppTest.kt
    └── resources

Java

Project Setup

mkdir -p test/src/main/java/hello
cd test
touch src/main/java/hello/HelloWorld.java
touch src/main/java/hello/Greeter.java

Source Files

HelloWorld.java

package hello;

import org.joda.time.LocalTime;

public class HelloWorld {
  public static void main(String[] args) {
    LocalTime currentTime = new LocalTime();
    System.out.println("The current local time is: " + currentTime);

    Greeter greeter = new Greeter();
    System.out.println(greeter.sayHello());
  }
}

Greeter.java

package hello;

public class Greeter {
  public String sayHello() {
  return "Hello world!";
  }
}

Build File

Create a build.gradle in the project root

apply plugin: 'java'

// Repositories for 3rd parties (nuget repos)
repositories {
    mavenCentral()
}

sourceCompatibility = 1.8
targetCompatibility = 1.8

// Dependicies (nuget)
dependencies {
    compile "joda-time:joda-time:2.2"
    testCompile "junit:junit:4.12"
}

// Name of jar to create
jar {
    baseName = 'gs-gradle'
    version =  '0.1.0'
}

Create Gradle Wrapper

This allows others to build it too maybe on winding

gradle wrapper --gradle-version=5.1.1

Update Gradle Wrapper

gradle wrapper --gradle-version 6.7.1

Run build

./gradlew build