How to remove unnecessary blank line on code formatting in IntelliJ?

Question

Is it possible to remove empty/blank lines using code formatting in Intellij IDEA?

Answer 1

Yes. It is possible to configure the number of blank lines in the settings menu (CTRL+ATL+S): File -> Settings -> Editor -> Code Style -> Java(or Scala or whatever your language is) -> Blank Lines

Answer 2

• File >> Setting >> Editor >> Code style java >>Blank lines tab

• You should change to 0 in code label(as picture), It would remove all unnecessary blank line when press format shortcut: ctrl + alt + L

Answer 3

You can find and replace with regex option also ^(?:[\t ]*(?:\r?\n|\r))+. It searches all empty lines in file. You need to just replace it with empty

Answer 4

Just in case it helps someone using newer versions of Intellij, in Intellij IDEA 2016.2.4 it is File -> Other Settings -> Default Settings -> Editor -> Code Style -> Java(or Scala or whatever your language is) -> Blank Lines

Answer 5

I use regular expression to remove extra blank line from code. Here are the instructions

• Open Find and Replace dialog. Use shortcut CTRL+SHIFT+R.
• In the search box type ^(?:[\t ]*(?:\r?\n|\r)){2,}. This will search for two ore more blank lines.
• In a replace box type \n. This will replace with one blank line.

• Open Reformat Code dialog and click Run. Use shortcut CTRL+ALT+L.

This works on all JetBrains IDEs. Use the screenshot as referece.