checkstyle.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC
        "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
        "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
<module name="Checker">
    <module name="FileTabCharacter"/>
    <module name="NewlineAtEndOfFile">
        <property name="lineSeparator" value="lf"/>
    </module>
    <module name="RegexpMultiline">
        <property name="format" value="\r"/>
        <property name="message" value="Line contains carriage return"/>
    </module>
    <module name="RegexpMultiline">
        <property name="format" value="\n\n\s*\}"/>
        <property name="message" value="Blank line before closing brace"/>
    </module>
    <module name="RegexpMultiline">
        <property name="format" value="\n\n\n"/>
        <property name="message" value="Multiple consecutive blank lines"/>
    </module>
    <module name="RegexpMultiline">
        <property name="format" value="\n\n\Z"/>
        <property name="message" value="Blank line before end of file"/>
    </module>
    <module name="RegexpMultiline">
        <property name="format" value="^[ \t]*import org.jetbrains.annotations.Nullable;$"/>
        <property name="message" value="Use javax.annotation.Nullable instead of org.jetbrains.annotations.Nullable"/>
    </module>

    <module name="SuppressWarningsFilter"/>
    <module name="TreeWalker">
        <module name="LineLength">
            <property name="max" value="200"/>
        </module>
        <module name="MethodLength"/>

        <module name="SuppressWarningsHolder"/>
        <module name="EmptyBlock">
            <property name="option" value="text"/>
            <property name="tokens" value="
                LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY, LITERAL_IF,
                LITERAL_FOR, LITERAL_TRY, LITERAL_WHILE, INSTANCE_INIT, STATIC_INIT"/>
        </module>
        <module name="EmptyStatement"/>
        <module name="EmptyForInitializerPad"/>
        <module name="EmptyForIteratorPad">
            <property name="option" value="space"/>
        </module>
        <module name="MethodParamPad">
            <property name="allowLineBreaks" value="true"/>
            <property name="option" value="nospace"/>
        </module>
        <module name="ParenPad"/>
        <module name="TypecastParenPad"/>
        <module name="NeedBraces"/>
        <module name="RightCurly"/>
        <module name="LeftCurly">
            <property name="option" value="eol"/>
            <property name="tokens" value="
                 LITERAL_CATCH, LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY, LITERAL_FOR,
                 LITERAL_IF, LITERAL_SWITCH, LITERAL_SYNCHRONIZED, LITERAL_TRY, LITERAL_WHILE"/>
        </module>
        <module name="MagicNumber">
            <property name="ignoreNumbers" value="-1, 0, 1, 2, 3, 4, 5"/>
        </module>
        <module name="GenericWhitespace"/>
        <module name="WhitespaceAfter"/>
        <module name="NoWhitespaceBefore"/>

        <module name="UpperEll"/>
        <module name="DefaultComesLast"/>
        <module name="ArrayTypeStyle"/>
        <module name="MultipleVariableDeclarations"/>
        <module name="ModifierOrder"/>
        <module name="OneStatementPerLine"/>
        <module name="StringLiteralEquality"/>
        <module name="MutableException"/>
        <module name="EqualsHashCode"/>
        <module name="InnerAssignment"/>
        <module name="InterfaceIsType"/>
        <module name="HideUtilityClassConstructor"/>

        <module name="ConstantName"/>
        <module name="MemberName"/>
        <module name="LocalVariableName"/>
        <module name="LocalFinalVariableName"/>
        <module name="TypeName"/>
        <module name="PackageName"/>
        <module name="ParameterName"/>
        <module name="StaticVariableName"/>
        <module name="ClassTypeParameterName">
            <property name="format" value="^[A-Z][0-9]?$"/>
        </module>
        <module name="MethodTypeParameterName">
            <property name="format" value="^[A-Z][0-9]?$"/>
        </module>

        <module name="AvoidStarImport"/>
        <module name="RedundantImport"/>
        <module name="UnusedImports"/>

        <module name="WhitespaceAround">
            <property name="allowEmptyConstructors" value="true"/>
            <property name="allowEmptyMethods" value="true"/>
            <property name="ignoreEnhancedForColon" value="false"/>
            <property name="tokens" value="
                ASSIGN, BAND, BAND_ASSIGN, BOR, BOR_ASSIGN, BSR, BSR_ASSIGN,
                BXOR, BXOR_ASSIGN, COLON, DIV, DIV_ASSIGN, EQUAL, GE, GT, LAND, LE,
                LITERAL_ASSERT, LITERAL_CATCH, LITERAL_DO, LITERAL_ELSE,
                LITERAL_FINALLY, LITERAL_FOR, LITERAL_IF, LITERAL_RETURN,
                LITERAL_SYNCHRONIZED, LITERAL_TRY, LITERAL_WHILE,
                LOR, LT, MINUS, MINUS_ASSIGN, MOD, MOD_ASSIGN, NOT_EQUAL,
                PLUS, PLUS_ASSIGN, QUESTION, SL, SLIST, SL_ASSIGN, SR, SR_ASSIGN,
                STAR, STAR_ASSIGN, TYPE_EXTENSION_AND"/>
        </module>

        <module name="IllegalInstantiation"/>
        <module name="MissingSwitchDefault"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>
        <module name="FinalClass"/>
        <module name="FinalParameters"/>
    </module>
</module>