checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
        "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
        "https://checkstyle.org/dtds/configuration_1_3.dtd">
<module name="com.puppycrawl.tools.checkstyle.Checker">
    <module name="LineLength">
        <property name="max" value="175"/>
    </module>
    <module name="SuppressionFilter">
        <property name="file" value="checkstyle-suppressions.xml"/>
    </module>
    <module name="com.puppycrawl.tools.checkstyle.filters.SuppressWithPlainTextCommentFilter"/>
    <module name="com.puppycrawl.tools.checkstyle.TreeWalker">
        <module name="ParameterNumber">
            <property name="max" value="7"/>
            <property name="tokens" value="METHOD_DEF"/>
        </module>
        <module name="ParameterNumber">
            <property name="max" value="10"/>
            <property name="tokens" value="CTOR_DEF"/>
        </module>
        <module name="EmptyLineSeparator">
            <property name="allowNoEmptyLineBetweenFields" value="true"/>
            <property name="allowMultipleEmptyLines" value="false"/>
            <property name="allowMultipleEmptyLinesInsideClassMembers" value="false"/>
        </module>
        <module name="TypecastParenPadCheck"/>
        <module name="ParenPadCheck"/>
        <module name="NoWhitespaceBefore"/>
        <module name="SeparatorWrap">
            <property name="tokens" value="COMMA"/>
        </module>
        <module name="WhitespaceAfter">
            <property name="tokens" value="COMMA"/>
        </module>
        <module name="WhitespaceAround"/>
        <module name="ConstantNameCheck"/>
        <module name="AbbreviationAsWordInName"/>
        <module name="ConstantName"/>
        <module name="LocalVariableName"/>
        <module name="MemberName"/>
        <module name="MethodName">
            <property name="format" value="^[a-z][a-zA-Z0-9_]*$"/>
        </module>
        <module name="ParameterName"/>
        <module name="StaticVariableName"/>
        <module name="AvoidStarImport"/>
        <module name="UnusedImports"/>
        <module name="EmptyStatement"/>
        <module name="MissingSwitchDefault"/>
        <module name="OneStatementPerLine"/>
        <module name="SimplifyBooleanReturn"/>
        <module name="StringLiteralEquality"/>
        <module name="InnerTypeLast"/>
        <module name="DeclarationOrder"/>
        <module name="SingleSpaceSeparator"/>
        <property name="tabWidth" value="5"/>
        <!-- Rules exported from Sonar-->
        <module name="SuppressWarningsHolder"/>
        <module name="AvoidInlineConditionals">
            <property name="severity" value="info"/>
        </module>
        <module name="AvoidStarImport">
            <property name="severity" value="info"/>
            <property name="allowStaticMemberImports" value="false"/>
            <property name="allowClassImports" value="false"/>
        </module>
        <module name="EmptyForIteratorPad">
            <property name="severity" value="info"/>
        </module>
        <module name="FinalClass">
            <property name="severity" value="warning"/>
        </module>
        <module name="GenericWhitespace">
            <property name="severity" value="info"/>
        </module>
        <module name="IllegalInstantiation">
            <property name="severity" value="warning"/>
            <property name="tokens" value="CLASS_DEF"/>
        </module>
        <module name="SuppressionCommentFilter"/>
    </module>
</module>