How to install Groovy on Windows?

Groovy is a great scripting language for the Java platform.

The first step to install it is to download the archive (ZIP).
http://groovy.codehaus.org/Download?nc

The second step is to unzip to a folder.
For example, C:\Java\groovy\2.0.5

Set GROOVY_HOME to the installation folder.

Then, edit the PATH variable, to add, in the beginning:
%GROOVY_HOME%\bin;

Finally, open a new console and execute the following command that should print the installed Groovy version:

groovy -version