Shortcut keys commonly used in idea

• Copy line ： Ctrl+D

• Delete row ： Ctrl+Y

• Cut line ： Ctrl+X

• Rename class 、 Variable 、 Such method ： Select the element with the same name , Press Shift+F6

• formatting code ：Ctrl+Alt+L ( Make the code more standard , for example : Indent 、 Wrap each statement )

• Convert case ：Ctrl+Shift+U

• Automatically declare variables to receive the result of method call expression ：Ctrl+Alt+V

• Select row , Annotate with a single line ：Ctrl+/

• Select row , Uncomment a single line ： Press again Ctrl+/

• Select row , Comment with multiple lines ：Ctrl+Shift+/

• Select row , Cancel multiline comment ： Press again Ctrl+Shift+/

• Insert a blank line to start editing ：

• Insert an empty line under the current cursor to start editing ：Shift+ enter

• Insert an empty line on the current cursor to start editing ：Ctrl+Alt+ enter

• Mobile code

• Move up ：Ctrl+Shift+↑( The whole method moves ) or Alt+Shift+↑ ( Move line by line )

• Move down the ：Ctrl+Shift+↓( The whole method moves ) or Alt+Shift+↓ ( Move line by line )

• Smart tips :Alt+ enter