chore: configure PMD

.github/workflows/build.yml

@@ -33,3 +33,5 @@ jobs:
         run: mvn checkstyle:check
       - name: SpotBugs
         run: mvn spotbugs:check
+      - name: PMD
+        run: mvn pmd:check

pmd-exclude.properties

@@ -0,0 +1,95 @@
+com.thealgorithms.bitmanipulation.SingleBitOperations=UselessParentheses
+com.thealgorithms.ciphers.AffineCipher=UselessParentheses
+com.thealgorithms.ciphers.ColumnarTranspositionCipher=UnnecessaryFullyQualifiedName
+com.thealgorithms.ciphers.DES=UselessParentheses
+com.thealgorithms.ciphers.HillCipher=UselessParentheses
+com.thealgorithms.ciphers.RSA=UselessParentheses
+com.thealgorithms.conversions.AnyBaseToAnyBase=UselessParentheses
+com.thealgorithms.conversions.AnytoAny=UselessParentheses
+com.thealgorithms.conversions.HexToOct=UselessParentheses
+com.thealgorithms.conversions.IntegerToRoman=UnnecessaryFullyQualifiedName
+com.thealgorithms.datastructures.crdt.LWWElementSet=UselessParentheses
+com.thealgorithms.datastructures.crdt.Pair=UnusedPrivateField
+com.thealgorithms.datastructures.graphs.A_Star=UselessParentheses
+com.thealgorithms.datastructures.graphs.AdjacencyMatrixGraph=CollapsibleIfStatements,UnnecessaryFullyQualifiedName,UselessParentheses
+com.thealgorithms.datastructures.graphs.BipartiteGrapfDFS=CollapsibleIfStatements
+com.thealgorithms.datastructures.graphs.Kruskal=UselessParentheses
+com.thealgorithms.datastructures.hashmap.hashing.HashMapCuckooHashing=UselessParentheses
+com.thealgorithms.datastructures.heaps.FibonacciHeap=UselessParentheses
+com.thealgorithms.datastructures.heaps.HeapElement=UselessParentheses
+com.thealgorithms.datastructures.heaps.HeapNode=UselessParentheses
+com.thealgorithms.datastructures.lists.DoublyLinkedList=UselessParentheses
+com.thealgorithms.datastructures.lists.SearchSinglyLinkedListRecursion=UselessParentheses
+com.thealgorithms.datastructures.lists.SinglyLinkedList=UnusedLocalVariable
+com.thealgorithms.datastructures.queues.PriorityQueue=UselessParentheses
+com.thealgorithms.datastructures.stacks.NodeStack=UnnecessaryFullyQualifiedName,UnusedFormalParameter
+com.thealgorithms.datastructures.stacks.StackArray=UselessParentheses
+com.thealgorithms.datastructures.trees.CheckBinaryTreeIsValidBST=UselessParentheses
+com.thealgorithms.datastructures.trees.Point=OverrideBothEqualsAndHashcode
+com.thealgorithms.datastructures.trees.SegmentTree=UselessParentheses
+com.thealgorithms.devutils.nodes.LargeTreeNode=UselessParentheses
+com.thealgorithms.devutils.nodes.SimpleNode=UselessParentheses
+com.thealgorithms.devutils.nodes.SimpleTreeNode=UselessParentheses
+com.thealgorithms.devutils.nodes.TreeNode=UselessParentheses
+com.thealgorithms.divideandconquer.ClosestPair=UnnecessaryFullyQualifiedName,UselessParentheses
+com.thealgorithms.divideandconquer.Point=UselessParentheses
+com.thealgorithms.dynamicprogramming.KnapsackMemoization=UselessParentheses
+com.thealgorithms.dynamicprogramming.MatrixChainMultiplication=UselessParentheses
+com.thealgorithms.dynamicprogramming.ShortestSuperSequence=UselessParentheses
+com.thealgorithms.dynamicprogramming.UniquePaths=UnnecessarySemicolon
+com.thealgorithms.dynamicprogramming.WineProblem=UselessParentheses
+com.thealgorithms.maths.BinomialCoefficient=UselessParentheses
+com.thealgorithms.maths.Complex=UselessParentheses
+com.thealgorithms.maths.DistanceFormulaTest=UnnecessaryFullyQualifiedName
+com.thealgorithms.maths.DudeneyNumber=UselessParentheses
+com.thealgorithms.maths.FibonacciJavaStreamsTest=BigIntegerInstantiation
+com.thealgorithms.maths.Gaussian=UselessParentheses
+com.thealgorithms.maths.GcdSolutionWrapper=UselessParentheses
+com.thealgorithms.maths.HeronsFormula=UselessParentheses
+com.thealgorithms.maths.KaprekarNumbers=UselessParentheses
+com.thealgorithms.maths.KeithNumber=UselessParentheses
+com.thealgorithms.maths.LeonardoNumber=UselessParentheses
+com.thealgorithms.maths.LinearDiophantineEquationsSolver=UselessParentheses
+com.thealgorithms.maths.MatrixUtil=BigIntegerInstantiation,UselessParentheses
+com.thealgorithms.maths.RomanNumeralUtil=UselessParentheses
+com.thealgorithms.maths.SecondMinMax=UselessParentheses
+com.thealgorithms.maths.SecondMinMaxTest=UnnecessaryFullyQualifiedName
+com.thealgorithms.maths.StandardDeviation=UselessParentheses
+com.thealgorithms.maths.SumOfArithmeticSeries=UselessParentheses
+com.thealgorithms.maths.TrinomialTriangle=UselessParentheses
+com.thealgorithms.maths.VampireNumber=CollapsibleIfStatements
+com.thealgorithms.maths.Volume=UselessParentheses
+com.thealgorithms.matrixexponentiation.Fibonacci=UnnecessaryFullyQualifiedName
+com.thealgorithms.misc.Sparsity=UselessParentheses
+com.thealgorithms.misc.ThreeSumProblem=UselessParentheses
+com.thealgorithms.misc.WordBoggle=UselessParentheses
+com.thealgorithms.others.CRC16=UselessParentheses
+com.thealgorithms.others.Damm=UnnecessaryFullyQualifiedName
+com.thealgorithms.others.Luhn=UnnecessaryFullyQualifiedName
+com.thealgorithms.others.Mandelbrot=UselessParentheses
+com.thealgorithms.others.MaximumSumOfDistinctSubarraysWithLengthK=CollapsibleIfStatements
+com.thealgorithms.others.MiniMaxAlgorithm=UselessParentheses
+com.thealgorithms.others.PageRank=UselessParentheses
+com.thealgorithms.others.PerlinNoise=UselessParentheses
+com.thealgorithms.others.QueueUsingTwoStacks=UselessParentheses
+com.thealgorithms.others.QueueWithStack=UselessParentheses
+com.thealgorithms.others.Trieac=UselessParentheses
+com.thealgorithms.others.Verhoeff=UnnecessaryFullyQualifiedName
+com.thealgorithms.searches.InterpolationSearch=UselessParentheses
+com.thealgorithms.searches.KMPSearch=UselessParentheses
+com.thealgorithms.searches.LinearSearchThread=EmptyCatchBlock
+com.thealgorithms.searches.RabinKarpAlgorithm=UselessParentheses
+com.thealgorithms.sorts.BubbleSortRecursion=UselessParentheses
+com.thealgorithms.sorts.CircleSort=EmptyControlStatement
+com.thealgorithms.sorts.CombSort=UselessParentheses
+com.thealgorithms.sorts.DutchNationalFlagSort=UselessParentheses
+com.thealgorithms.sorts.LinkListSort=EmptyControlStatement,UnusedLocalVariable
+com.thealgorithms.sorts.MergeSortNoExtraSpace=UselessParentheses
+com.thealgorithms.sorts.PigeonholeSort=UselessParentheses
+com.thealgorithms.sorts.RadixSort=UselessParentheses
+com.thealgorithms.sorts.WiggleSort=UselessParentheses
+com.thealgorithms.stacks.PostfixToInfix=UselessParentheses
+com.thealgorithms.strings.HorspoolSearch=UnnecessaryFullyQualifiedName,UselessParentheses
+com.thealgorithms.strings.MyAtoi=UselessParentheses
+com.thealgorithms.strings.Palindrome=UselessParentheses
+com.thealgorithms.strings.Solution=CollapsibleIfStatements

pom.xml

@@ -135,6 +135,17 @@
                     </plugins>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-pmd-plugin</artifactId>
+                <version>3.22.0</version>
+                <configuration>
+                    <printFailingErrors>true</printFailingErrors>
+                    <includeTests>true</includeTests>
+                    <linkXRef>false</linkXRef>
+                    <excludeFromFailureFile>pmd-exclude.properties</excludeFromFailureFile>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
 </project>