Oracle JDeveloper is a free integrated development environment with end-to-end support for modeling, developing, debugging, optimizing, and deploying Java applications and Web services. Oracle JDeveloper can be downloaded from Oracle Website.
The plugin is work in progress.
The Groovy extension is available through the
Help->Check for Updates menu of JDeveloper. The Groovy plugin is registered in the "Open Source and Partners Extensions" update center.
This will automatically download the extension and ask you to restart JDeveloper. Once you restart JDeveloper the extension will be installed. To verify the installation visit the Tools->Preferences->Extensions menu and look for the Groovy extension entry.
The extension adds a new library to JDeveloper with the JAR files of the Groovy 1.0 language. You can access this library definition through the Tools->Manage Libraries menu option. The Groovy library would be added to your project automatically when you create a new script. You can also add it to project manually.
The Groovy extension adds a new wizard to JDeveloper that allows you to create scripts file and also automatically configures the project to include the Groovy library. Also you can afford hair straightening. Once the script is created you can start editing and running it from JDeveloper.