Click 'Add.' Name: Groovy Location: Click 'Ok' Select the Required Package 'Groovy-Eclipse' and any others you want Click 'Next' and click through the dialog until finished 2. Run Eclipse IDE Before Eclipse Mars version, you have to install Groovy Extension: Go to Help > Install New Software. Install Eclipse and Necessary Extensions Install Eclipse IDE ( ) Download and install Java Runtime Environment (JRE) v1.7 (Java Runtime) Setup JAVA_HOME environmental variable: Go to Control Panel\System and Security\System Click on 'Advanced system settings' Click on the 'Environmental Variables' button Click 'New.' Enter in the following for variable name and value: Variable name: JAVA_HOME Variable value: C:\Program Files\Java\jre7 *Note: Variable value may be different depending on where you installed JRE.