build.gradle

 group 'imapim'
version '1.0-SNAPSHOT'

apply plugin: 'java'
 apply plugin: 'idea'

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

sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    // https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-engine
    compile group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: '5.0.2'
    // https://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk15on
    compile group: 'org.bouncycastle', name: 'bcprov-jdk15on', version: '1.58'
    // https://mvnrepository.com/artifact/org.bouncycastle/bcpg-jdk15on
    compile group: 'org.bouncycastle', name: 'bcpg-jdk15on', version: '1.58'
    // https://mvnrepository.com/artifact/javax.mail/javax.mail-api
    compile group: 'javax.mail', name: 'javax.mail-api', version: '1.6.0'
    // https://mvnrepository.com/artifact/com.sun.mail/javax.mail
    compile group: 'com.sun.mail', name: 'javax.mail', version: '1.6.0'
    // https://mvnrepository.com/artifact/org.jsoup/jsoup
    compile group: 'org.jsoup', name: 'jsoup', version: '1.11.2'
    // https://mvnrepository.com/artifact/com.thoughtworks.xstream/xstream
    compile group: 'com.thoughtworks.xstream', name: 'xstream', version: '1.4.10'
    // https://mvnrepository.com/artifact/org.controlsfx/controlsfx
//    compile group: 'org.controlsfx', name: 'controlsfx', version: '9.0.0'
    // https://mvnrepository.com/artifact/org.json/json
    compile group: 'org.json', name: 'json', version: '20171018'
}

 sourceSets {
     main {
         java {
             srcDirs = ["src/main/java"]
         }
         resources {
             srcDirs = ["src/main/java", "src/main/resources"]
             exclude "**/*.java"
             includes = ["**/*.fxml", "**/*.css"]
         }
     }
 }

 jar {
     manifest {
         attributes 'Main-Class': 'imapim.ui.IM'
     }
     from (configurations.compile.collect { entry -> zipTree(entry) }) {
         exclude 'META-INF/MANIFEST.MF'
         exclude 'META-INF/*.SF'
         exclude 'META-INF/*.DSA'
         exclude 'META-INF/*.RSA'
     }
 }