I am the eclipse turned around, IntelliJ idea can be set into Eclipse shortcut key style, may be a little different, according to the needs of their own configuration on the line. Set the shortcut key, open the settings (ctrl+alt+s) Search Keymap, select Eclipse in Keymaps.
Using Eclipse's Code completion shortcut key alt+/has been accustomed to, but inteljidea this shortcut key combination has no effect, then we can modify it, press Ctrl+alt+s to open the settings interface
Then select Eclipse in the Keymaps, then the following will be modified, in the upper right corner of the search box enter completion, in MainMenu can find
With the basic line selected, right-click, select Add Keyboard Shortcut, press and hold the alt+/key in the first stroke of the window, then OK.
Change IntelliJ shortcut keys for Eclipse style, and recover alt+/Code Auto-complete shortcut keys code completion