Ctrl+Shift+I # View the contents of a file in the popup window without opening it. To open a quick definition window, select a file in the Files tool window (Views | Tool Windows | Files) and press Ctrl+Shift+I.
Ctrl+空格 # When using basic code completion Ctrl+空格, you don't need to type the upper-case letters in CamelHump names. It is enough to type the initial letters of the camel names in lower case, and they will be smartly recognized.
Ctrl+Shift+F7 # To view all methods of the implemented interfaces in a class, place the caret at the implements keyword in the class declaration and press Ctrl+Shift+F7.
Ctrl+Shift+N # To quickly open a file, press Ctrl+Shift+N (Navigate | File) and start typing its name. Use the filter icon to only search among the selected file types:
Alt+Enter # Press Alt+Enter to replace a complicated comparison with the BETWEEN operator. (数据库操作)
Ctrl+K # Press Ctrl+K to invoke the Commit Changes dialog.
It shows all modifications in a project, provides files' status summary, and suggests improvements before checking in.