How to have the formatter wrap code with IntelliJ?

问题:

I'm not able to format my code in IntelliJ.

I can see the margin line (by default at 120 columns) but it seems that the activation from the menu:

Code -> Reformat Code

is just ignoring this margin.

回答1:

Do you mean that the formatter does not break long lines? Check Settings / Project Settings / Code Style / Wrapping.

Update: in later versions of IntelliJ, the option is under Settings / Editor / Code Style. And select Wrap when typing reaches right margin.

回答2:

IntelliJ IDEA 14, 15, 2016 & 2017

Format existing code

1. Ensure right margin is not exceeded

   File > Settings > Editor > Code Style > Java > Wrapping and Braces > Ensure right margin is not exceeded

   

2. Reformat code

   Code > Reformat code...

   

   or press Ctrl + Alt + L

   If you have something like this:

   thisLineIsVeryLongAndWillBeChanged();   // comment
   

   it will be converted to

   thisLineIsVeryLongAndWillBeChanged();   
   // comment  
   

   instead of

   // comment  
   thisLineIsVeryLongAndWillBeChanged();   
   

   This is why I select pieces of code before reformatting if the code looks like in the previous example.

Wrap when typing reaches right margin

• IntelliJ IDEA 14: File > Settings > Editor > Code Style > Wrap when typing reaches right margin

  

• IntelliJ IDEA 15, 2016 & 2017: File > Settings > Editor > Code Style > Wrap on typing

  

回答3:

Or you can use the shortcut:

Ctrl + Alt + L

回答4:

You can create a macro for Ctrl +Shift + S (for example) that do all this things:

Edit > Macros > Start Macro Recording (the recording will start). Click where you need.

For example:

Code > Reformat Code
Code > Auto-Indent Lines
Code > Optimize Imports
Code > Rearrange Code
File > Save All
... (all that you want)

Then, click on red button in bottom-right of the IDE to stop the Macro recording.

Set a macro name.

Go to File > Settings > Macros > YOUR MACRO NAME.

Right Click > Add Keyboard Shortcut, and type Ctrl + Shift + S.

回答5:

Enabling "Ensure right margin is not exceeded" doesn't work for me in Intellij IDEA 2018.2. I have found the workaround, we need to change every elements below from "Do not wrap" to "Wrap if long".

After that, we can preview what kind of wrap type will be changed by looking into right panel. If we are satisfied, Click "OK" or "Apply" to apply the changes. Finally we need a mannual format by using CTRL+ ALT+ L in Windows and Command+ Shift+ L in MacOS.