checkstyle.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE module PUBLIC
        "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
        "https://checkstyle.org/dtds/configuration_1_3.dtd">
<!-- List of all checks: https://checkstyle.sourceforge.io/checks.html -->
<module name="Checker">
    <module name="NewlineAtEndOfFile">
        <property name="fileExtensions" value="java, xml"/>
    </module>

    <module name="FileTabCharacter">
        <property name="eachLine" value="true"/>
    </module>

    <module name="FileLength">
        <property name="max" value="1000"/>
    </module>

    <module name="LineLength">
        <property name="max" value="160"/>
    </module>

    <module name="TreeWalker">
        <module name="ParenPad"/>
        <module name="UpperEll"/>
        <module name="LeftCurly"/>
        <module name="EmptyBlock"/>
        <module name="RightCurly"/>
        <module name="NoLineWrap"/>
        <module name="MagicNumber"/>
        <module name="Indentation"/>
        <module name="PackageName"/>
        <module name="RequireThis"/>
        <module name="OperatorWrap"/>
        <module name="NoCodeInFile"/>
        <module name="NestedIfDepth"/>
        <module name="ModifierOrder"/>
        <module name="UnusedImports"/>
        <module name="AtclauseOrder"/>
        <module name="UnusedImports"/>
        <module name="NestedForDepth"/>
        <module name="NestedTryDepth"/>
        <module name="EmptyStatement"/>
        <module name="EqualsHashCode"/>
        <module name="MethodParamPad"/>
        <module name="MissingOverride"/>
        <module name="CovariantEquals"/>
        <module name="AvoidStarImport"/>
        <module name="RedundantImport"/>
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>
        <module name="TypecastParenPad"/>
        <module name="MissingDeprecated"/>
        <module name="AvoidNestedBlocks"/>
        <module name="GenericWhitespace"/>
        <module name="NoWhitespaceAfter"/>
        <module name="ArrayTrailingComma"/>
        <module name="NoWhitespaceBefore"/>
        <module name="EmptyForIteratorPad"/>
        <module name="CommentsIndentation"/>
        <module name="UnusedLocalVariable"/>
        <module name="NoEnumTrailingComma"/>
        <module name="OneStatementPerLine"/>
        <module name="SingleSpaceSeparator"/>
        <module name="IllegalInstantiation"/>
        <module name="StringLiteralEquality"/>
        <module name="EmptyForInitializerPad"/>
        <module name="InvalidJavadocPosition"/>
        <module name="MultipleStringLiterals"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="NonEmptyAtclauseDescription"/>
        <module name="HideUtilityClassConstructor"/>
        <module name="JavadocContentLocationCheck"/>
        <module name="MultipleVariableDeclarations"/>
        <module name="JavadocMissingLeadingAsterisk"/>
        <module name="AvoidEscapedUnicodeCharacters"/>
        <module name="UnnecessarySemicolonInEnumeration"/>
        <module name="RequireEmptyLineBeforeBlockTagGroup"/>
        <module name="AvoidNoArgumentSuperConstructorCall"/>
        <module name="JavadocMissingWhitespaceAfterAsterisk"/>
        <module name="UnnecessarySemicolonInTryWithResources"/>
        <module name="UnnecessarySemicolonAfterOuterTypeDeclaration"/>
        <module name="UnnecessarySemicolonAfterTypeMemberDeclaration"/>

        <module name="ParameterNumber">
            <property name="max" value="5"/>
        </module>

        <module name="LambdaBodyLength">
            <property name="max" value="5"/>
        </module>

        <module name="AnonInnerLength">
            <property name="max" value="60"/>
        </module>

        <module name="ArrayTypeStyle">
            <property name="javaStyle" value="true"/>
        </module>

        <module name="BooleanExpressionComplexity">
            <property name="max" value="5"/>
        </module>

        <module name="CatchParameterName">
            <property name="format" value="^([a-z][a-zA-Z0-9]+Exception)|exception$"/>
        </module>

        <module name="SeparatorWrap">
            <property name="tokens" value="COMMA"/>
        </module>

        <module name="EmptyCatchBlock">
            <property name="exceptionVariableName" value="expected|ignore"/>
        </module>

        <module name="MethodLength">
            <property name="max" value="15"/>
        </module>

        <module name="EmptyLineSeparator">
            <property name="tokens" value="METHOD_DEF"/>
            <property name="allowMultipleEmptyLines" value="false"/>
            <property name="allowMultipleEmptyLinesInsideClassMembers" value="false"/>
        </module>

        <module name="AnnotationLocation">
            <property name="allowSamelineSingleParameterlessAnnotation" value="false"/>
            <property name="allowSamelineParameterizedAnnotation" value="true"/>
        </module>

        <module name="CustomImportOrder">
            <property name="separateLineBetweenGroups" value="true"/>
            <property name="sortImportsInGroupAlphabetically" value="true"/>
            <property name="customImportOrderRules"
                      value="THIRD_PARTY_PACKAGE###STANDARD_JAVA_PACKAGE###STATIC"/>
        </module>
    </module>
</module>