Any way (or shortcut) to auto import the classes in IntelliJ IDEA like in Eclipse?

Question

In Eclipse, while coding in Java and press Ctrl + Shift + O auto import all the Classes automatically.
In NetBeans, this is done with

Answer 1

I think the best solution, though not exactly the same as Eclipse/Netbeans, is to change the 'Optimize Imports' settings.

Under Preferences > Editor > General > Auto Import

Set Add unambiguous imports on the fly

Edit: Using this method, when there are ambiguous imports, IntelliJ will let you know, and you can then use Alt + Enter method outlined in the answer by Wuaner

I find that, almost always, the most appropriate Import is at the top of the list.