Idea shortcut

ctrl+space, Automatically prompt to complete the code
ctrl+shift+space, Intelligent completion code
ctrl+shift+enter Intelligently complete the statement and apply the format
alt+enter Call out the modification of the prompt at the prompt
ctrl+W, Intelligently select code snippets , Repeat to expand the scope
ctrl+shift+w, Narrow the scope of the selected code block
alt+shift+ arrow , Quickly move the position of the current line
ctrl+shift+ arrow , The method of moving blocks quickly （ The cursor is in front of the method name ）
ctrl+alt+T, Add wrapping methods to your code （if,try,while,for…）
ctrl+shift+delete Remove wrapping from wrapping code
ctrl+alt+V Extract multiple used local variables （ Used multiple times i+1, take i+1 Extract into a single variable ）
ctrl+alt+M Extract code blocks into a method , Fast extraction of common methods
ctrl+shift+alt+T Fast refactoring
ctrl+alt+L,ctrl+alt+shift+L Quickly optimize code format, etc
ctrl+P Check the method parameter signature
ctrl+Q View the document of the object
ctrl+shift+I View the definition method of the object
ctrl+E, View recently opened files
ctrl+shift+E View recently visited dai