Installing Groovy

Installing Groovy is not much different from the other languages covered so far. Using your favorite browser, visit its home page at http://groovy-lang.org:

Here's the installation procedure:

• From the home page, find the Download section.
• Click the prominent Download button. This will start the download of a ZIP file. At the time of writing, this was apache-groovy-sdk-2.4.10.zip.
• Extract the file to a convenient place on your system and add its bin directory to your system's path.

Groovy is bundled with two REPL environments: the GUI-based GroovyConsole and the text-based GroovyShell. Let's validate the installation by launching the GUI application, GroovyConsole. After adding the bin directory to the PATH of your system, as instructed earlier, launch a new Command Prompt (Windows) or Terminal window (macOS and Linux), and then run the following command:

GroovyConsole

This will launch the GroovyConsole. This is a convenient program to run small Groovy scripts, and we will use...