Intellij comment format

IntelliJ 2017.2 now does exactly what you want. I'm not sure when this was originally introduced.

Project Settings > Code Style > Java
Change tab to Code Generation, locate Comment Code section
Uncheck "Line Comment at First Column"
Check "Add a space at comment start"

Now when you press Control-/

    boolean goodCode = true;

becomes

    // boolean goodCode = true;

There is an option in: Code Style > Java > Code Generation > Comment Code

intellij cfg

With "Line comment at first column" you can switch between:

    //System.out.println("");
//  System.out.println("");

So, you don't have a 'space' after comment (in first line), but its close enough :)

Idea 2017.2+

Recent versions of IntelliJ IDEA support adding a space after the line comment. The setting is at the same location.

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