Code Style Kotlin
for Windows and Linux
for OS X
Use this page to configure formatting options for Kotlin files. View the result in the
Preview pane on the right.
On this page:
Tabs and Indents
|Use tab character||
If this check box is selected, tab characters are used:
- On pressing the Tab key
- For indentation
- For code reformatting
When the check box is cleared, IntelliJ IDEA uses spaces instead of tabs.
- If this check box is selected, the part of indentation defined by the nesting of code blocks,
is made of the tabs and (if necessary) spaces, while the part of indentation defined by
the alignment is made only of spaces.
- If this check box is cleared, only tabs are used. This means that a group of spaces that
fits the specified tab size is automatically replaced with a tab, which may result in
breaking fine alignment.
The Smart Tabs check box is available if the
Use Tab Character check box is selected.
|Tab size||In this text box, specify the number of spaces included in a tab.|
|Indent||In this text box, specify the number of spaces (or tabs if the
Use Tab Character
check box is selected) to be inserted for each indent level.
|Continuation indent||In this text box, specify the number of spaces (or tabs if the
Use Tab Character check box is selected) to be inserted between the elements
of an array, in expressions, method declarations and method calls.|
|Keep indents on empty lines||If this check box is selected, then IntelliJ IDEA will keep indents on the empty lines as if they
contained some code.|
If this check box is not selected, IntelliJ IDEA will delete the tab characters and spaces.
Use this tab to specify where you want spaces in your code. To have IntelliJ IDEA automatically insert a space at a location,
select the check box next to this location in the list.
The results are displayed in the Preview pane.
Wrapping and braces
In this tab, customize the code style options, which IntelliJ IDEA will apply on
reformatting the source code. The left-hand pane contains the list of exceptions
(Keep when reformatting), and placement and alignment options for the various code
constructs (lists, statements, operations, annotations, etc.) The right-hand pane shows preview.
Alignment takes precedence over indentation options.
Keep when reformatting
Use the check boxes to configure exceptions that IntelliJ IDEA will make when reformatting the source code.
For example, by default, the Line breaks check box is selected. If your code contains lines that are shorter than a
standard convention, you can convert them by disabling the Line breaks check box before you reformat the source code.
The wrapping style applies to the various code constructs, specified in the left-hand pane (for example, method call arguments, or assignment statements).
|Wrapping style||From this drop-down list, select the desired wrapping style:
|Align when multiline||If this check box is selected, a code construct starts at the same column on each next line.
Otherwise, the position of a code construct is determined by the current indentation level.
|Top-level Symbols||Use this area to define how the top-level symbols are imported. The possible options are:
- Use single name import: if this option is selected, only a particular
declaration from a package during code generation or import optimization is imported.
- Use import with '*': if this option is selected, a statement importing an
entire package is inserted.
- Use import with '*' if at least <n> names used: if this option is
selected, specify the number of declarations to be imported from a single package, until all the
statements importing a single declaration are substituted with a statement importing an entire
|Java Statics and Enum Members||Use this area to define how Java statics and enums are imported.
|Other||Use this area to define how the other symbols are imported.
Insert imports for nested classes:
- If this check box is selected, IntelliJ IDEA creates imports for the nested classes referenced
in your code.
- If this option is not selected, IntelliJ IDEA generates import for the top-level class and
qualifies the name of the nested class with the name of its top-level class.
|Packages to Use Import with '*'||Use the table as follows:
- Package: In the text fields of this column, specify the packages to be
- With Subpackages: Select this check box to have IntelliJ IDEA import all the
subpackages of the selected package.
Click this link to reveal the list of languages to be used as the base for the current language code style.
So doing, only the settings that are applicable to the current language are taken. All the other settings
are not affected.
This link appears in the upper-right corner of the language-specific code style page, when
Click Reset to discard changes and return to the initial set of code style settings.
Language and Framework-Specific Guidelines:
Last modified: 29 November 2016