Easy to use shortcut keys in idea

Open Settings

ctrl alt s

Select text in any style

ctrl+shift+alt Hold on
Drag the mouse to select text
After copying the code, it is necessary to remove superfluous things ！

Rectangle selected text

Switch to this mode :shift+alt+insert
Cancel this mode in the same way

formatting code

ctrl+alt+l

Find rewritable methods in the class

ctrl+o

Find a word in the code

Eternal ctrl+f
Enhanced search （ Global search ）:Ctrl + shift +F

Pick a word

Place the cursor in the middle of the word , then ctrl+w

Copy a whole line

Place the cursor in the middle of a line , then Ctrl+c

Add constructors, etc

The cursor is in a class
Alt+Insert

Quickly return to the location where you last viewed the code

ctrl+alt+ Direction key