Is there really no way to generate a switch case for a given variable in IntelliJ?
Ctrl+Space as well as Ctrl+J yield no results.
For enum variables, enter switch (myEnumVar)
and press Alt+Enter. Smart completion will suggest: Create missing 'switch' branches
Crazy Coder provided the following screenshot showing how to enable the Create Enum Switch Branches intention.
See YouTrack issue 6374.