IntellijIDEA lets you add different intentions for strings and perform different actions with strings in Scala. IntellijIDEA also supports a Scala multi-line strings feature. This feature lets you format literals and helps your code to look more orderly.
1. How to Insert Gap with concatenation into a String
IntellijIDEA lets you insert a gap with concatenation intention. To do that, in your editor enter a string and press Alt+ Enter. The list of appropriate intentions opens.
Select Insert gap with concatenation ("+ +") and press Enter.
Now you can insert a value into your string. You can evaluate the result in Scala Console.
2. How to Convert a String Concatenation into Interpolated String
For the Scala version 2.10 and later you also have the ability to convert a string concatenation into the interpolated string.
To do that, select a value with concatenation in your string and press Alt+ Enter. The list of appropriate intentions opens. (You can also choose an option Convert to formatted string and get your basic Java formatted string.)
Select Convert to interpolated string, press Enterand view the result.
3. How to Convert a String into a Multi-line String
You can convert your string into a multi-line string. Simply press Alt+ Enterand select Convert to """string""" option in the drop-down list of intentions.
To start entering a multi-line string, simply type triple quotes in your editor.
If you press Enter, it will automatically envoke stripMargin method. The stripMargin method removes the left-hand part of a multiline string up to a specified delimiter.
The white spaces are also preserved. Please see the following example:
4. How to Insert a Replace Intention
The .replace("\r"," ") intention lets you keep the carret in the correct place on the next line in the multi-line strings regardless of what operating system you have at the moment.
5. How to Edit Multi-line Strings Settings
You can set a different format for multi-line strings options such as Margin char indent or Margin Char. You can also disable a multi-line strings support.
To open the Multi-line strings settings, in the main menu select File → Setting → Project Settings → Code Style → Scala. On the Scala page select the Multi-line strings tab.