$ mkdir helloworld-proj # create project dir $ cd helloworld-proj $ mkdir src/main # main source dir $ mkdir src/test # test (junit) source dir $ mkdir bin # shell/bat scripts to run $ mkdir lib # lib ...

Within the src/main/java/hello directory, you can create any Java classes you want. To maintain consistency with the rest of this guide, create these two classes: HelloWorld.java and Greeter.java.