PMD configuration

Many Java developers like to use PMD to check best practices, code style, naming conventions and much more. It requires configuration via a ruleset.xml configuration file as detailed in PMD's documentation.
If you don't specify your custom configuration file we use our default below. We suggest to add your own configuration file into your repository root directory to be able to specify your coding and quality standards.
ruleset.xml

<ruleset name="quickstart"
         xmlns="http://pmd.sourceforge.net/ruleset/2.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://pmd.sourceforge.net/ruleset/2.0.0 https://pmd.sourceforge.io/ruleset_2_0_0.xsd">
    <description>PMD Rules</description>

    <!-- BEST PRACTICES -->

    <!-- <rule ref="category/java/bestpractices.xml/AbstractClassWithoutAbstractMethod" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/AccessorClassGeneration" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/AccessorMethodGeneration" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/ArrayIsStoredDirectly" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/AvoidPrintStackTrace" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/AvoidReassigningParameters" /> -->
    <rule ref="category/java/bestpractices.xml/AvoidStringBufferField" />
    <rule ref="category/java/bestpractices.xml/AvoidUsingHardCodedIP" />
    <rule ref="category/java/bestpractices.xml/CheckResultSet" />
    <rule ref="category/java/bestpractices.xml/ConstantsInInterface" />
    <rule ref="category/java/bestpractices.xml/DefaultLabelNotLastInSwitchStmt" />
    <rule ref="category/java/bestpractices.xml/ForLoopCanBeForeach" />
    <rule ref="category/java/bestpractices.xml/GuardLogStatement" />
    <!-- <rule ref="category/java/bestpractices.xml/JUnit4SuitesShouldUseSuiteAnnotation" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/JUnit4TestShouldUseAfterAnnotation" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/JUnit4TestShouldUseBeforeAnnotation" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/JUnit4TestShouldUseTestAnnotation" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/JUnitAssertionsShouldIncludeMessage" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/JUnitTestContainsTooManyAsserts" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/JUnitTestsShouldIncludeAssert" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/JUnitUseExpected" /> -->
    <rule ref="category/java/bestpractices.xml/LooseCoupling" />
    <!-- <rule ref="category/java/bestpractices.xml/MethodReturnsInternalArray" /> -->
    <rule ref="category/java/bestpractices.xml/MissingOverride" />

    <rule ref="category/java/bestpractices.xml/OneDeclarationPerLine" />
    <rule ref="category/java/bestpractices.xml/PositionLiteralsFirstInCaseInsensitiveComparisons" />
    <rule ref="category/java/bestpractices.xml/PositionLiteralsFirstInComparisons" />
    <rule ref="category/java/bestpractices.xml/PreserveStackTrace" />

    <!-- <rule ref="category/java/bestpractices.xml/ReplaceEnumerationWithIterator" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/ReplaceHashtableWithMap" /> -->
    <!-- <rule ref="category/java/bestpractices.xml/ReplaceVectorWithList" /> -->

    <rule ref="category/java/bestpractices.xml/SwitchStmtsShouldHaveDefault" />

    <!-- <rule ref="category/java/bestpractices.xml/SystemPrintln" /> -->

    <rule ref="category/java/bestpractices.xml/UnusedFormalParameter" />

    <rule ref="category/java/bestpractices.xml/UnusedImports" />
    <rule ref="category/java/errorprone.xml/ImportFromSamePackage" />

    <rule ref="category/java/bestpractices.xml/UnusedLocalVariable" />
    <rule ref="category/java/bestpractices.xml/UnusedPrivateField" />
    <rule ref="category/java/bestpractices.xml/UnusedPrivateMethod" />

    <rule ref="category/java/bestpractices.xml/UseAssertEqualsInsteadOfAssertTrue" />
    <rule ref="category/java/bestpractices.xml/UseAssertNullInsteadOfAssertTrue" />
    <rule ref="category/java/bestpractices.xml/UseAssertSameInsteadOfAssertTrue" />
    <rule ref="category/java/bestpractices.xml/UseAssertTrueInsteadOfAssertEquals" />

    <rule ref="category/java/bestpractices.xml/UseCollectionIsEmpty" />
    <!-- <rule ref="category/java/bestpractices.xml/UseVarargs" /> -->

    <!-- <rule ref="category/java/codestyle.xml/AtLeastOneConstructor" /> -->
    <rule ref="category/java/codestyle.xml/AvoidDollarSigns" />
    <!-- <rule ref="category/java/codestyle.xml/AvoidFinalLocalVariable" /> -->

    <rule ref="category/java/codestyle.xml/AvoidProtectedFieldInFinalClass" />

    <rule ref="category/java/codestyle.xml/AvoidProtectedMethodInFinalClassNotExtending" />

    <!-- NAMING CONVENTIONS -->

    <rule ref="category/java/codestyle.xml/FormalParameterNamingConventions" />
    <rule ref="category/java/codestyle.xml/ClassNamingConventions" />
    <rule ref="category/java/codestyle.xml/LocalVariableNamingConventions" />
    <rule ref="category/java/codestyle.xml/MethodNamingConventions" />
    <rule ref="category/java/codestyle.xml/PackageCase" />

    <!-- UNIMPLEMENTED -->

    <!-- <rule ref="category/java/codestyle.xml/FieldNamingConventions" /> -->
    <rule ref="category/java/codestyle.xml/GenericsNaming" />

    <!-- <rule ref="category/java/codestyle.xml/LongVariable" /> -->
    <rule ref="category/java/codestyle.xml/ShortClassName" />
    <rule ref="category/java/codestyle.xml/ShortMethodName" />
    <rule ref="category/java/codestyle.xml/ShortVariable" />

    <!-- OTHER -->

    <!-- <rule ref="category/java/codestyle.xml/AvoidUsingNativeCode" /> -->
    <!-- <rule ref="category/java/codestyle.xml/BooleanGetMethodName" /> -->
    <!-- <rule ref="category/java/codestyle.xml/CallSuperInConstructor" /> -->
    <!-- <rule ref="category/java/codestyle.xml/CommentDefaultAccessModifier" /> -->
    <!-- <rule ref="category/java/codestyle.xml/ConfusingTernary" /> -->
    <rule ref="category/java/codestyle.xml/ControlStatementBraces" />
    <!-- <rule ref="category/java/codestyle.xml/DefaultPackage" /> -->

    <rule ref="category/java/codestyle.xml/DontImportJavaLang" />
    <rule ref="category/java/codestyle.xml/DuplicateImports" />

    <!-- <rule ref="category/java/codestyle.xml/EmptyMethodInAbstractClassShouldBeAbstract" /> -->

    <rule ref="category/java/codestyle.xml/ExtendsObject" />

    <!-- <rule ref="category/java/codestyle.xml/FieldDeclarationsShouldBeAtStartOfClass" /> -->
    <rule ref="category/java/codestyle.xml/ForLoopShouldBeWhileLoop" />

    <rule ref="category/java/codestyle.xml/IdenticalCatchBranches" />

    <!-- <rule ref="category/java/codestyle.xml/LocalVariableCouldBeFinal" /> -->
    <!-- <rule ref="category/java/codestyle.xml/MethodArgumentCouldBeFinal" /> -->

    <!-- <rule ref="category/java/codestyle.xml/MIsLeadingVariableName" /> -->
    <rule ref="category/java/codestyle.xml/NoPackage" />
    <!-- <rule ref="category/java/codestyle.xml/OnlyOneReturn" /> -->
    <!-- <rule ref="category/java/codestyle.xml/PrematureDeclaration" /> -->

    <!-- <rule ref="category/java/codestyle.xml/SuspiciousConstantFieldName" /> -->
    <!-- <rule ref="category/java/codestyle.xml/TooManyStaticImports" /> -->
    <rule ref="category/java/codestyle.xml/UnnecessaryAnnotationValueElement" />
    <rule ref="category/java/codestyle.xml/UnnecessaryConstructor" />
    <rule ref="category/java/codestyle.xml/UnnecessaryFullyQualifiedName" />
    <rule ref="category/java/codestyle.xml/UnnecessaryLocalBeforeReturn" />
    <rule ref="category/java/codestyle.xml/UnnecessaryModifier" />
    <rule ref="category/java/codestyle.xml/UnnecessaryReturn" />
    <rule ref="category/java/codestyle.xml/UselessParentheses" />
    <rule ref="category/java/codestyle.xml/UselessQualifiedThis" />

    <rule ref="category/java/design.xml/AbstractClassWithoutAnyMethod" />
    <!-- <rule ref="category/java/design.xml/AvoidCatchingGenericException" /> -->
    <!-- <rule ref="category/java/design.xml/AvoidDeeplyNestedIfStmts" /> -->
    <!-- <rule ref="category/java/design.xml/AvoidRethrowingException" /> -->
    <!-- <rule ref="category/java/design.xml/AvoidThrowingNewInstanceOfSameException" /> -->
    <!-- <rule ref="category/java/design.xml/AvoidThrowingNullPointerException" /> -->
    <!-- <rule ref="category/java/design.xml/AvoidThrowingRawExceptionTypes" /> -->
    <rule ref="category/java/design.xml/ClassWithOnlyPrivateConstructorsShouldBeFinal" />
    <!-- <rule ref="category/java/design.xml/CollapsibleIfStatements" /> -->
    <rule ref="category/java/design.xml/CouplingBetweenObjects" />
    <!-- <rule ref="category/java/design.xml/DataClass" /> -->
    <!-- <rule ref="category/java/design.xml/DoNotExtendJavaLangError" /> -->
    <!-- <rule ref="category/java/design.xml/ExceptionAsFlowControl" /> -->
    <!-- <rule ref="category/java/design.xml/ExcessiveClassLength" /> -->
    <!-- <rule ref="category/java/design.xml/ExcessiveImports" /> -->
    <rule ref="category/java/design.xml/ExcessiveMethodLength" />
    <rule ref="category/java/design.xml/ExcessiveParameterList" />
    <rule ref="category/java/design.xml/ExcessivePublicCount" />
    <rule ref="category/java/design.xml/FinalFieldCouldBeStatic" />
    <!-- <rule ref="category/java/design.xml/GodClass" /> -->
    <!-- <rule ref="category/java/design.xml/ImmutableField" /> -->
    <rule ref="category/java/design.xml/LawOfDemeter" />
    <rule ref="category/java/design.xml/LogicInversion" />

    <rule ref="category/java/design.xml/CyclomaticComplexity" />
    <!-- <rule ref="category/java/design.xml/NcssCount" /> -->
    <rule ref="category/java/design.xml/NPathComplexity" />

    <!-- <rule ref="category/java/design.xml/SignatureDeclareThrowsException" /> -->

    <rule ref="category/java/design.xml/SimplifiedTernary" />

    <!-- <rule ref="category/java/design.xml/SimplifyBooleanAssertion" /> -->
    <!-- <rule ref="category/java/design.xml/SimplifyBooleanExpressions" /> -->

    <rule ref="category/java/design.xml/SimplifyBooleanReturns" />
    <rule ref="category/java/design.xml/SimplifyConditional" />
    <rule ref="category/java/design.xml/SingularField" />
    <!-- <rule ref="category/java/design.xml/SwitchDensity" /> -->
    <rule ref="category/java/design.xml/TooManyFields" /> -->
    <rule ref="category/java/design.xml/TooManyMethods" /> -->
    <rule ref="category/java/design.xml/UselessOverridingMethod" />
    <!-- <rule ref="category/java/design.xml/UseObjectForClearerAPI" /> -->
    <rule ref="category/java/design.xml/UseUtilityClass" />

    <!-- <rule ref="category/java/documentation.xml/CommentContent" /> -->
    <!-- <rule ref="category/java/documentation.xml/CommentRequired" /> -->
    <!-- <rule ref="category/java/documentation.xml/CommentSize" /> -->
    <rule ref="category/java/documentation.xml/UncommentedEmptyConstructor" />
    <rule ref="category/java/documentation.xml/UncommentedEmptyMethodBody" />

    <rule ref="category/java/errorprone.xml/AssignmentInOperand" />
        <properties>
            <property name="allowWhile" value="true" />
        </properties>
    </rule>
    <rule ref="category/java/errorprone.xml/AssignmentToNonFinalStatic" />
    <rule ref="category/java/errorprone.xml/AvoidAccessibilityAlteration" />
    <!-- <rule ref="category/java/errorprone.xml/AvoidAssertAsIdentifier" /> -->
    <rule ref="category/java/errorprone.xml/AvoidBranchingStatementAsLastInLoop" />
    <!-- <rule ref="category/java/errorprone.xml/AvoidCallingFinalize" /> -->
    <!-- <rule ref="category/java/errorprone.xml/AvoidCatchingNPE" /> -->
    <rule ref="category/java/errorprone.xml/AvoidCatchingThrowable" />
    <rule ref="category/java/errorprone.xml/AvoidDecimalLiteralsInBigDecimalConstructor" />
    <!-- <rule ref="category/java/errorprone.xml/AvoidDuplicateLiterals" /> -->
    <!-- <rule ref="category/java/errorprone.xml/AvoidEnumAsIdentifier" /> -->
    <!-- <rule ref="category/java/errorprone.xml/AvoidFieldNameMatchingMethodName" /> -->
    <!-- <rule ref="category/java/errorprone.xml/AvoidFieldNameMatchingTypeName" /> -->
    <rule ref="category/java/errorprone.xml/AvoidInstanceofChecksInCatchClause" />
    <!-- <rule ref="category/java/errorprone.xml/AvoidLiteralsInIfCondition" /> -->
    <!-- <rule ref="category/java/errorprone.xml/AvoidLosingExceptionInformation" /> -->
    <rule ref="category/java/errorprone.xml/AvoidMultipleUnaryOperators" />
    <rule ref="category/java/errorprone.xml/AvoidUsingOctalValues" />
    <rule ref="category/java/errorprone.xml/BadComparison" />
    <!-- <rule ref="category/java/errorprone.xml/BeanMembersShouldSerialize" /> -->
    <rule ref="category/java/errorprone.xml/BrokenNullCheck" />
    <!-- <rule ref="category/java/errorprone.xml/CallSuperFirst" /> -->
    <!-- <rule ref="category/java/errorprone.xml/CallSuperLast" /> -->
    <rule ref="category/java/errorprone.xml/CheckSkipResult" />
    <rule ref="category/java/errorprone.xml/ClassCastExceptionWithToArray" />
    <rule ref="category/java/errorprone.xml/CloneMethodMustBePublic" />
    <rule ref="category/java/errorprone.xml/CloneMethodMustImplementCloneable" />
    <rule ref="category/java/errorprone.xml/CloneMethodReturnTypeMustMatchClassName" />
    <rule ref="category/java/errorprone.xml/CloneThrowsCloneNotSupportedException" />
    <rule ref="category/java/errorprone.xml/CloseResource" />
    <rule ref="category/java/errorprone.xml/CompareObjectsWithEquals" />
    <!-- <rule ref="category/java/errorprone.xml/ConstructorCallsOverridableMethod" /> -->
    <!-- <rule ref="category/java/errorprone.xml/DataflowAnomalyAnalysis" /> -->
    <rule ref="category/java/errorprone.xml/DoNotCallGarbageCollectionExplicitly" />
    <!-- <rule ref="category/java/errorprone.xml/DoNotCallSystemExit" /> -->

    <rule ref="category/java/errorprone.xml/DoNotExtendJavaLangThrowable" />
    <rule ref="category/java/design.xml/DoNotExtendJavaLangError" />

    <!-- <rule ref="category/java/errorprone.xml/DoNotHardCodeSDCard" /> -->
    <!-- <rule ref="category/java/errorprone.xml/DoNotThrowExceptionInFinally" /> -->

    <!-- <rule ref="category/java/errorprone.xml/DontImportSun" /> -->

    <rule ref="category/java/errorprone.xml/DontUseFloatTypeForLoopIndices" />
    <rule ref="category/java/errorprone.xml/EmptyCatchBlock" />

    <!-- EMPTY RULES -->

    <rule ref="category/java/errorprone.xml/EmptyFinalizer" />
    <rule ref="category/java/errorprone.xml/EmptyFinallyBlock" />
    <rule ref="category/java/errorprone.xml/EmptyIfStmt" />
    <rule ref="category/java/errorprone.xml/EmptyInitializer" />
    <rule ref="category/java/errorprone.xml/EmptyStatementBlock" />
    <rule ref="category/java/errorprone.xml/EmptyStatementNotInLoop" />
    <rule ref="category/java/errorprone.xml/EmptySwitchStatements" />
    <rule ref="category/java/errorprone.xml/EmptySynchronizedBlock" />
    <rule ref="category/java/errorprone.xml/EmptyTryBlock" />
    <rule ref="category/java/errorprone.xml/EmptyWhileStmt" />

    <rule ref="category/java/errorprone.xml/EqualsNull" />

    <!-- <rule ref="category/java/errorprone.xml/FinalizeDoesNotCallSuperFinalize" /> -->
    <!-- <rule ref="category/java/errorprone.xml/FinalizeOnlyCallsSuperFinalize" /> -->
    <!-- <rule ref="category/java/errorprone.xml/FinalizeOverloaded" /> -->
    <!-- <rule ref="category/java/errorprone.xml/FinalizeShouldBeProtected" /> -->
    <rule ref="category/java/errorprone.xml/IdempotentOperations" />
    <rule ref="category/java/errorprone.xml/InstantiationToGetClass" />
    <!-- <rule ref="category/java/errorprone.xml/InvalidSlf4jMessageFormat" /> -->
    <rule ref="category/java/errorprone.xml/JumbledIncrementer" />
    <!-- <rule ref="category/java/errorprone.xml/JUnitSpelling" /> -->
    <!-- <rule ref="category/java/errorprone.xml/JUnitStaticSuite" /> -->
    <!-- <rule ref="category/java/errorprone.xml/LoggerIsNotStaticFinal" /> -->
    <!-- <rule ref="category/java/errorprone.xml/MethodWithSameNameAsEnclosingClass" /> -->
    <rule ref="category/java/errorprone.xml/MisplacedNullCheck" />
    <rule ref="category/java/errorprone.xml/MissingBreakInSwitch" />
    <!-- <rule ref="category/java/errorprone.xml/MissingSerialVersionUID" /> -->
    <rule ref="category/java/errorprone.xml/MissingStaticMethodInNonInstantiatableClass" />
    <!-- <rule ref="category/java/errorprone.xml/MoreThanOneLogger" /> -->
    <rule ref="category/java/errorprone.xml/NonCaseLabelInSwitchStatement" />
    <rule ref="category/java/errorprone.xml/NonStaticInitializer" />
    <!-- <rule ref="category/java/errorprone.xml/NullAssignment" /> -->
    <rule ref="category/java/errorprone.xml/OverrideBothEqualsAndHashcode" />
    <rule ref="category/java/errorprone.xml/ProperCloneImplementation" />
    <rule ref="category/java/errorprone.xml/ProperLogger" />
    <rule ref="category/java/errorprone.xml/ReturnEmptyArrayRatherThanNull" />
    <rule ref="category/java/errorprone.xml/ReturnFromFinallyBlock" />
    <!-- <rule ref="category/java/errorprone.xml/SimpleDateFormatNeedsLocale" /> -->
    <rule ref="category/java/errorprone.xml/SingleMethodSingleton" />
    <rule ref="category/java/errorprone.xml/SingletonClassReturningNewInstance" />
    <!-- <rule ref="category/java/errorprone.xml/StaticEJBFieldShouldBeFinal" /> -->
    <!-- <rule ref="category/java/errorprone.xml/StringBufferInstantiationWithChar" /> -->
    <rule ref="category/java/errorprone.xml/SuspiciousEqualsMethodName" />
    <rule ref="category/java/errorprone.xml/SuspiciousHashcodeMethodName" />
    <rule ref="category/java/errorprone.xml/SuspiciousOctalEscape" />
    <!-- <rule ref="category/java/errorprone.xml/TestClassWithoutTestCases" /> -->
    <rule ref="category/java/errorprone.xml/UnconditionalIfStatement" />
    <!-- <rule ref="category/java/errorprone.xml/UnnecessaryBooleanAssertion" /> -->
    <!-- <rule ref="category/java/errorprone.xml/UnnecessaryCaseChange" /> -->
    <rule ref="category/java/errorprone.xml/UnnecessaryConversionTemporary" />
    <rule ref="category/java/errorprone.xml/UnusedNullCheckInEquals" />
    <!-- <rule ref="category/java/errorprone.xml/UseCorrectExceptionLogging" /> -->
    <rule ref="category/java/errorprone.xml/UseEqualsToCompareStrings" />
    <rule ref="category/java/errorprone.xml/UselessOperationOnImmutable" />
    <rule ref="category/java/errorprone.xml/UseLocaleWithCaseConversions" />
    <!-- <rule ref="category/java/errorprone.xml/UseProperClassLoader" /> -->

    <!-- <rule ref="category/java/multithreading.xml/AvoidSynchronizedAtMethodLevel" /> -->
    <rule ref="category/java/multithreading.xml/AvoidThreadGroup" />
    <rule ref="category/java/multithreading.xml/AvoidUsingVolatile" />
    <!-- <rule ref="category/java/multithreading.xml/DoNotUseThreads" /> -->
    <rule ref="category/java/multithreading.xml/DontCallThreadRun" />
    <rule ref="category/java/multithreading.xml/DoubleCheckedLocking" />
    <rule ref="category/java/multithreading.xml/NonThreadSafeSingleton" />
    <rule ref="category/java/multithreading.xml/UnsynchronizedStaticDateFormatter" />
    <!-- <rule ref="category/java/multithreading.xml/UseConcurrentHashMap" /> -->
    <rule ref="category/java/multithreading.xml/UseNotifyAllInsteadOfNotify" />

    <!-- <rule ref="category/java/performance.xml/AddEmptyString" /> -->
    <!-- <rule ref="category/java/performance.xml/AppendCharacterWithChar" /> -->
    <!-- <rule ref="category/java/performance.xml/AvoidArrayLoops" /> -->
    <!-- <rule ref="category/java/performance.xml/AvoidFileStream" /> -->
    <!-- <rule ref="category/java/performance.xml/AvoidInstantiatingObjectsInLoops" /> -->
    <!-- <rule ref="category/java/performance.xml/AvoidUsingShortType" /> -->
    <rule ref="category/java/performance.xml/BigIntegerInstantiation" />
    <rule ref="category/java/performance.xml/BooleanInstantiation" />
    <!-- <rule ref="category/java/performance.xml/ByteInstantiation" /> -->
    <!-- <rule ref="category/java/performance.xml/ConsecutiveAppendsShouldReuse" /> -->
    <!-- <rule ref="category/java/performance.xml/ConsecutiveLiteralAppends" /> -->
    <!-- <rule ref="category/java/performance.xml/InefficientEmptyStringCheck" /> -->
    <!-- <rule ref="category/java/performance.xml/InefficientStringBuffering" /> -->
    <!-- <rule ref="category/java/performance.xml/InsufficientStringBufferDeclaration" /> -->
    <!-- <rule ref="category/java/performance.xml/IntegerInstantiation" /> -->
    <!-- <rule ref="category/java/performance.xml/LongInstantiation" /> -->
    <rule ref="category/java/performance.xml/OptimizableToArrayCall" />
    <!-- <rule ref="category/java/performance.xml/RedundantFieldInitializer" /> -->
    <!-- <rule ref="category/java/performance.xml/SimplifyStartsWith" /> -->
    <!-- <rule ref="category/java/performance.xml/ShortInstantiation" /> -->
    <!-- <rule ref="category/java/performance.xml/StringInstantiation" /> -->
    <!-- <rule ref="category/java/performance.xml/StringToString" /> -->
    <rule ref="category/java/performance.xml/TooFewBranchesForASwitchStatement" />
    <!-- <rule ref="category/java/performance.xml/UnnecessaryWrapperObjectCreation" /> -->
    <!-- <rule ref="category/java/performance.xml/UseArrayListInsteadOfVector" /> -->
    <!-- <rule ref="category/java/performance.xml/UseArraysAsList" /> -->
    <!-- <rule ref="category/java/performance.xml/UseIndexOfChar" /> -->
    <!-- <rule ref="category/java/performance.xml/UselessStringValueOf" /> -->
    <!-- <rule ref="category/java/performance.xml/UseStringBufferForStringAppends" /> -->
    <!-- <rule ref="category/java/performance.xml/UseStringBufferLength" /> -->
</ruleset>
Ignoring files

Storing generated or third party code in your repository is in general not a good idea. However, sometimes you really need to do this and CodeFlow got you covered. Usually you don't want to analyze those files so you can place .rulesetignore file to the root folder of your repository. This file can contain list of files that are ignored.
If you are dealing with any special type of project structure, please, let us know. We are happy to help you.