pmd.xml

<?xml version="1.0" encoding="UTF-8"?>
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<ruleset name="Default Maven PMD Plugin Ruleset"
    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 http://pmd.sourceforge.net/ruleset_2_0_0.xsd">

    <description>
        The default ruleset used by the Maven PMD Plugin, when no other ruleset is specified.
        It contains the rules of the old (pre PMD 6.0.0) rulesets java-basic, java-empty, java-imports,
        java-unnecessary, java-unusedcode.

        This ruleset might be used as a starting point for an own customized ruleset [0].

        [0] https://pmd.github.io/latest/pmd_userdocs_understanding_rulesets.html
    </description>

    <rule ref="category/java/bestpractices.xml/AvoidUsingHardCodedIP" />
    <rule ref="category/java/bestpractices.xml/CheckResultSet" />
    <rule ref="category/java/bestpractices.xml/UnusedImports" />
    <rule ref="category/java/bestpractices.xml/UnusedFormalParameter" />
    <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/codestyle.xml/DontImportJavaLang" />
    <rule ref="category/java/codestyle.xml/DuplicateImports" />
    <rule ref="category/java/codestyle.xml/ExtendsObject" />
    <rule ref="category/java/codestyle.xml/ForLoopShouldBeWhileLoop" />
    <rule ref="category/java/codestyle.xml/TooManyStaticImports" />
    <rule ref="category/java/codestyle.xml/UnnecessaryFullyQualifiedName" />
    <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/CollapsibleIfStatements" />
    <rule ref="category/java/design.xml/SimplifiedTernary" />
    <rule ref="category/java/design.xml/UselessOverridingMethod" />

    <rule ref="category/java/errorprone.xml/AvoidBranchingStatementAsLastInLoop" />
    <rule ref="category/java/errorprone.xml/AvoidDecimalLiteralsInBigDecimalConstructor" />
    <rule ref="category/java/errorprone.xml/AvoidMultipleUnaryOperators" />
    <rule ref="category/java/errorprone.xml/AvoidUsingOctalValues" />
    <rule ref="category/java/errorprone.xml/BrokenNullCheck" />
    <rule ref="category/java/errorprone.xml/CheckSkipResult" />
    <rule ref="category/java/errorprone.xml/ClassCastExceptionWithToArray" />
    <rule ref="category/java/errorprone.xml/DontUseFloatTypeForLoopIndices" />
    <rule ref="category/java/errorprone.xml/EmptyCatchBlock" />
    <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/ImportFromSamePackage" />
    <rule ref="category/java/errorprone.xml/JumbledIncrementer" />
    <rule ref="category/java/errorprone.xml/MisplacedNullCheck" />
    <rule ref="category/java/errorprone.xml/OverrideBothEqualsAndHashcode" />
    <rule ref="category/java/errorprone.xml/ReturnFromFinallyBlock" />
    <rule ref="category/java/errorprone.xml/UnconditionalIfStatement" />
    <rule ref="category/java/errorprone.xml/UnnecessaryConversionTemporary" />
    <rule ref="category/java/errorprone.xml/UnusedNullCheckInEquals" />
    <rule ref="category/java/errorprone.xml/UselessOperationOnImmutable" />

    <rule ref="category/java/multithreading.xml/AvoidThreadGroup" />
    <rule ref="category/java/multithreading.xml/DontCallThreadRun" />
    <rule ref="category/java/multithreading.xml/DoubleCheckedLocking" />

    <rule ref="category/java/performance.xml/BigIntegerInstantiation" />
    <rule ref="category/java/performance.xml/BooleanInstantiation" />

</ruleset>