Kotlin - Hello World + Gradle Setting

코틀린, 왜?

Kotlin을 쉽게 결론내면, Java와 Scala의 혼종이 아닐까 싶다.

JVM의 패왕Java.

개발자들이 Java의 문법에 지쳐갈 때 쯤... Scala가 나왔다.

FP. Functional Programming를 표방하면서...

 

FP와 OOP의 어느 중간쯤에서 태어난 혼종.

 

Hello World

package sample

fun main(args : Array) {
	println("Hello, world!")
}

 

Gradle

현재 시점 2018-10-02 JDK8까지 지원.

plugins {
	id 'org.jetbrains.kotlin.jvm' version '1.2.71'
}
ext {
	lombok_version = '1.18.2'
	spring_boot_version = '2.0.5.RELEASE'
	junit_version = '4.12'
	java_version = '1.8'
}

apply plugin: 'idea'
apply plugin: 'eclipse'

group 'archmagece'
version '1.0-SNAPSHOT'

sourceCompatibility = java_version
targetCompatibility = java_version
compileKotlin {
	kotlinOptions.jvmTarget = java_version
	kotlinOptions.freeCompilerArgs = ['-Xjsr305=strict']
}
compileTestKotlin {
	kotlinOptions.jvmTarget = java_version
	kotlinOptions.freeCompilerArgs = ['-Xjsr305=strict']
}

idea {
	module {
		downloadJavadoc = true
		downloadSources = true
	}
}
eclipse {
	classpath {
		downloadJavadoc = true
		downloadSources = true
	}
}

repositories {
	mavenCentral()
	jcenter()
	mavenLocal()
	maven {
		url "https://plugins.gradle.org/m2/"
	}
}

dependencies {
	compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
	testCompile "org.jetbrains.kotlin:kotlin-test"
	testCompile "org.jetbrains.kotlin:kotlin-test-junit"

	//logging
	compile "org.springframework.boot:spring-boot-starter-logging:$spring_boot_version"

	testImplementation "junit:junit:$junit_version"
}