Groovy Error

Groovy provides a number of helper methods when working with I/O. Groovy provides easier classes to provide the following functionalities for files.

• Reading files
• Writing to files
• Traversing file trees
• Reading and writing data objects to files

In addition to this, you can always use the normal Java classes listed below for File I/O operations:

• java.io.File
• java.io.InputStream
• java.io.OutputStream
• java.io.Reader
• java.io.Writer

it has already been answered in this article - https://intellij-support.jetbrains.com/hc/en-us/community/posts/206637955-groovy-consolefnaf 4