IntelliJ IDEA Keyboard Shortcuts by dmop

Ctrl + /	Comment line
Ctrl + Shift + /	Comment block
Ctrl + D	Duplicate line
Alt + Shift + Down/Up	Move line
Ctrl + Alt + Shift + Down/Up	Move whole statement
Ctrl + - (number pad)	Collapse block
Ctrl + + (number pad)	Expand Block
Ctrl + Shift + +/- (number pad)	Collap­se/­Expand whole file

Ctrl + A	Select whole file
Ctrl + W	Extend selection to next code block
Ctrl + Shift + W	Shrinks selection
Alt + J	Select next occurrence
Alt + Shift + J	Deselect last occurrence
Ctrl + Alt + Shift + J	Select all occurr­ences in file
Ctrl + Shift + F7	Highlight all usages in file

Ctrl + Space	Suggest (Enter for add/Tab to overwrite)
Ctrl + Space x2	Deeper level of suggestion
Ctrl + Shift + Space	List of matching suggestion
Ctrl + Shift + Space x2	Suggestion in return statement
Ctrl + Shift + Enter	Complet statement

Shift + F6	Rename
Ctrl + Alt + V	Extract variable or field
Ctrl + Alt + M	Encapsule code in new method
Ctrl + Alt + C	Extract selected expression into a constant
Ctrl + Alt + P	Extract selected expression into a parameter
Ctrl + Alt + T	Surrou­nd/wrap selected code

Ctrl + P	See method signature
Ctrl + J	Insert live template
Ctrl + Q	See method docume­nta­ntion
Ctrl + Alt + L	Reformat code
Ctrl + Shift + i	See definition
F2	Next highli­ghted error in file
Ctrl + F1	See descri­ption error
Alt + Enter	See suggested solution

Ctrl + N	Search Class
Ctrl + Shift + N	Search File
F4	Jump to source
Ctrl + B	Jump to declar­ation
Ctrl + Alt + B	Jump to implem­ent­ation
Ctrl + F12	See file structure