How to see an object's full type name in IntelliJ Idea?
Hover the mouse over the identifier with the ctrl key held down, and you will see a tooltip containing the full type name.
If you place the caret inside the variable you want to identify and press
CTRL + SHIFT + P
a small popup will show the type like so:
If you place the caret inside an expression, Idea will first ask what part of the expression you want to identify.