What is the version of groovy?

Can u inform me about the version of groovy which the Web-IDE is supporting?

And also, to support the version of groovy, which version of JAVA should we install?

Now, I wanna make environment to develop Smart Apps on local device.
So, suppose there is anyone who know it, kindly inform me about them.

For compatibility purposes running with Groovy 2.0.8 would be your best choice. However, locally you could run a newer version as long as your not using features that were only introduced > 2.0.8.

As far as Java support goes you’ll want to running some flavor of JDK7, the latest update should serve you well. Only Groovy 2.3 and higher officially supports JDK8, so you won’t want to upgrade to that yet.