Here's another question about the logic behind IDEA's code suggestions (Using IDEA 12.1). Consider this screenshot:
Why does IDEA not select setText(String text) for the JLabel? I have to either use the cursor keys to get to the right line, or I have to go back and change the "t" into "T" manually, because if I hit "(" now, the method "settext(" is not recognized (obviously), but if I hit "enter", the wrong method is inserted.
Note that this is the auto-popup. If I hit CTRL-SHIFT-space, "setText(String text)" is selected.
Edit: When I set the option in Settings -> Editor -> Code completion it does work as desired, although the description of the checkbox does not suggest that it would do that.