Google's Java Style Checkstyle Coverage

Useful information

This coverage report was created for Google Java Style( cached page) , version of 28 February 2017

Checkstyle's html report for Guava library

Checkstyle configuration for 'Google Java Style'

Legend

"--" - There is no rule in this paragraph.
"↓" - This paragraph is the high-level point of some group.
- Existing Check covers all requirements from Google.
- Existing Check covers some part of requirements from Google.
- Requirements are not possible to check by Checkstyle at all.

Coverage table

Google's Java Style Rule Checkstyle Check Applied to config
1 Introduction --
1.1 Terminology notes --
1.2 Guide notes --
2 Source file basics
2.1 File name OuterTypeFilename config
test
2.2 File encoding: UTF-8 explanation
2.3.1 Whitespace characters FileTabCharacter config
test
2.3.2 Special escape sequences IllegalTokenText config
test
2.3.3 Non-ASCII characters AvoidEscapedUnicodeCharacters config
test
3 Source file structure EmptyLineSeparator config
test
3.1 License or copyright information, if present --
3.2 Package statement LineLength

NoLineWrap
config
test
config
test
3.3 Import statements
3.3.1 No wildcard imports AvoidStarImport config
test
3.3.2 No line-wrapping LineLength

NoLineWrap
config
test
config
test
3.3.3 Ordering and spacing CustomImportOrder config
test
3.3.4 No static import for classes That validation could not be checked by Checkstyle. It's need information from another class(java file). But Checkstyle have no way to open or look at another java file.
3.4 Class declaration
3.4.1 Exactly one top-level class declaration OneTopLevelClass config
test
3.4.2 Class member ordering --
3.4.2.1 Overloads: never split OverloadMethodsDeclarationOrder config
test
4 Formatting --
4.1 Braces
4.1.1 Braces are used where optional NeedBraces config
test
4.1.2 Nonempty blocks: K & R style LeftCurly
RightCurly
config
test
config
test
4.1.3 Empty blocks: may be concise EmptyBlock

EmptyCatchBlock
config
test config
test
4.2 Block indentation: +2 spaces Indentation
The rule "A line is never broken adjacent to the arrow in a lambda, except that a break may come immediately after the arrow if the body of the lambda consists of a single unbraced expression" will be addressed in the issue #4006.
config
test
4.3 One statement per line OneStatementPerLine config
test
4.4 Column limit: 100 LineLength
We can detect URL with protocol type as http://, https:// etc.
JSNI could not be detected right now, but might be possible after comments and javadoc support appear in Checkstyle
config
test
4.5 Line-wrapping --
4.5.1 Where to break OperatorWrap

SeparatorWrap

MethodParamPad
config
test
config
test
config
test
4.5.2 Indent continuation lines at least +4 spaces Indentation config
test
4.6 Whitespace
4.6.1 Vertical Whitespace EmptyLineSeparator
Blank lines between two consecutive fields are optional. This exception is not satisfied
config
test
4.6.2 Horizontal whitespace WhitespaceAround

GenericWhitespace

MethodParamPad

ParenPad

NoWhitespaceBefore
config
test
config
test
config
test
config
test
config
test
4.6.3 Horizontal alignment: never required --
4.7 Grouping parentheses: recommended --
4.8 Specific constructs
4.8.1 Enum classes --
4.8.2 Variable declarations
4.8.2.1 One variable per declaration MultipleVariableDeclarations config
test
4.8.2.2 Declared when needed VariableDeclarationUsageDistance
config
test
4.8.3 Arrays
4.8.3.1 Array initializers: can be "block-like" --
4.8.3.2 No C-style array declarations ArrayTypeStyle config
test
4.8.4 Switch statements --
4.8.4.1 Indentation Indentation config
test
4.8.4.2 Fall-through: commented FallThrough config
test
4.8.4.3 The default case is present MissingSwitchDefault
"Exception: enum type may omit the default statement group" requirement can not be covered as we can not distinguish types, enum values may look the same as static final String constants.
config
test
4.8.5 Annotations AnnotationLocation config
test
4.8.6 Comments
4.8.6.1 Block comment style CommentsIndentation config
test
4.8.7 Modifiers ModifierOrder config
test
4.8.8 Numeric Literals UpperEll config
test
5 Naming
5.1 Rules common to all identifiers "5.2 Rules of identifier type" already includes this rule.
5.2 Rules by identifier type
5.2.1 Package names PackageName config
test
5.2.2 Class names TypeName config
test
5.2.3 Method names MethodName
No ability to distinguish verb at the beginning of name, no way distinguish Test method from others so "_" is allowed in names
config
test
5.2.4 Constant names Every constant is a static final field, but not all static final fields are constants - impossible to check such rule.
5.2.5 Non-constant field names MemberName config
test
5.2.6 Parameter names ParameterName

CatchParameterName
config
test
config
test
5.2.7 Local variable names LocalVariableName config
test
5.2.8 Type variable names MethodTypeParameterName
ClassTypeParameterName
InterfaceTypeParameterName
config
test
config
test
config
test
5.3 Camel case: defined AbbreviationAsWordInName
Non covered: Some words are ambiguously hyphenated in the English language. No way to distinguish "YouTubeImporter" or "YoutubeImporter".
config
test
6 Programming Practices
6.1 @Override: always used That validation could not be checked by Checkstyle. It's need to take a look as parent class. But Checkstyle have no way to open or look at another Class file.
6.2 Caught exceptions: not ignored EmptyBlock with option=text. config
test
6.3 Static members: qualified using class Proper validation require parsing other files, sources are not always available.
6.4 Finalizers: not used NoFinalizer config
test
7 Javadoc
7.1 Formatting
7.1.1 General form
SingleLineJavadoc Recent update for guide that clarify requirements will be addressed at #4052
config
test
7.1.2 Paragraphs JavadocParagraph config
test
7.1.3 Block tags AtclauseOrder

JavadocTagContinuationIndentation

NonEmptyAtclauseDescription
config
test
config
test
config
test
7.2 The summary fragment SummaryJavadoc config
test
7.3 Where Javadoc is used JavadocMethod config
test
7.3.1 Exception: self-explanatory methods JavadocMethod config
test
7.3.2 Exception: overrides JavadocMethod
Overrides are checked by presence of "@Override" annotation on method.
config
test
7.3.4 Non-required Javadoc --