Java application deployment

Builds with Gradle, Buildr, Maven, and Ant

By Richard Mayhew

Builds with Gradle, Buildr, Maven, and Ant

We’ll be looking at identical builds for three build tools: gradle, maven, and buildr. There are no differences between the project file structures, only the build directive files were different.

The “test project” was a simple Newton-Raphson implementation for calculating square roots, with one interface, one implementation (using 1.6’s “@Override” in the implementation), and one TestNG test; the goal is to show a simple project with a TestNG dependency. Other dependencies shouldn’t change the build files much.


This is our baseline project configuration, and should represent a close minimum of a Maven 3.0 pom for a project with a dependency on JDK 1.6 and TestNG. It will use the most recent version of TestNG that it is able to find (which is the “[5.14.0,)” version number in the TestNG dependency block.) The file will normally be named pom.xml:

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns=""
































The project is built with “mvn package”. It gives a deployable artifact, called “” (the rest of these yield “nr-1.0.jar” files.)


The equivalent gradle configuration file (build.gradle) would look like this:

apply plugin: 'java'

repositories {



dependencies {

    testCompile group: 'org.testng', name: 'testng', version: '5.14+'



The invocation command line is “gradle assemble”.


Buildr’s build file is “buildfile”; the project definition looks like this:

repositories.remote << ''

define 'nr' do


   package :jar

   test.using :testng

   compile.using :source=>'1.6', :target=>'1.6'


The invocation command line is simply “buildr package”.

18 Nov 2010

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