Create package prime, matrix and games (#6139)

Author: varada610

src/main/java/com/thealgorithms/maths/GoldbachConjecture.java

@@ -1,6 +1,6 @@
 package com.thealgorithms.maths;
 
-import static com.thealgorithms.maths.PrimeCheck.isPrime;
+import static com.thealgorithms.maths.Prime.PrimeCheck.isPrime;
 
 /**
  * This is a representation of the unsolved problem of Goldbach's Projection, according to which every

src/main/java/com/thealgorithms/maths/LiouvilleLambdaFunction.java renamed to src/main/java/com/thealgorithms/maths/Prime/LiouvilleLambdaFunction.java

@@ -1,4 +1,4 @@
-package com.thealgorithms.maths;
+package com.thealgorithms.maths.Prime;
 
 /*
  * Java program for liouville lambda function
@@ -24,7 +24,7 @@ private LiouvilleLambdaFunction() {
      *         -1 when number has odd number of prime factors
      * @throws IllegalArgumentException when number is negative
      */
-    static int liouvilleLambda(int number) {
+    public static int liouvilleLambda(int number) {
         if (number <= 0) {
             // throw exception when number is less than or is zero
             throw new IllegalArgumentException("Number must be greater than zero.");

src/main/java/com/thealgorithms/maths/MillerRabinPrimalityCheck.java renamed to src/main/java/com/thealgorithms/maths/Prime/MillerRabinPrimalityCheck.java

@@ -1,4 +1,4 @@
-package com.thealgorithms.maths;
+package com.thealgorithms.maths.Prime;
 
 import java.util.Random;
 

src/main/java/com/thealgorithms/maths/MobiusFunction.java renamed to src/main/java/com/thealgorithms/maths/Prime/MobiusFunction.java

@@ -1,4 +1,4 @@
-package com.thealgorithms.maths;
+package com.thealgorithms.maths.Prime;
 
 /*
  * Java program for mobius function
@@ -25,7 +25,7 @@ private MobiusFunction() {
      *          0 when number has repeated prime factor
      *         -1 when number has odd number of prime factors
      */
-    static int mobius(int number) {
+    public static int mobius(int number) {
         if (number <= 0) {
             // throw exception when number is less than or is zero
             throw new IllegalArgumentException("Number must be greater than zero.");

src/main/java/com/thealgorithms/maths/PrimeCheck.java renamed to src/main/java/com/thealgorithms/maths/Prime/PrimeCheck.java

@@ -1,4 +1,4 @@
-package com.thealgorithms.maths;
+package com.thealgorithms.maths.Prime;
 
 import java.util.Scanner;
 

src/main/java/com/thealgorithms/maths/PrimeFactorization.java renamed to src/main/java/com/thealgorithms/maths/Prime/PrimeFactorization.java

@@ -1,4 +1,4 @@
-package com.thealgorithms.maths;
+package com.thealgorithms.maths.Prime;
 
 /*
  * Authors:

src/main/java/com/thealgorithms/maths/SquareFreeInteger.java renamed to src/main/java/com/thealgorithms/maths/Prime/SquareFreeInteger.java

@@ -1,4 +1,4 @@
-package com.thealgorithms.maths;
+package com.thealgorithms.maths.Prime;
 /*
  * Java program for Square free integer
  * This class has a function which checks

src/main/java/com/thealgorithms/maths/TwinPrime.java

@@ -9,6 +9,8 @@
  *
  * */
 
+import com.thealgorithms.maths.Prime.PrimeCheck;
+
 public final class TwinPrime {
     private TwinPrime() {
     }

src/main/java/com/thealgorithms/maths/MatrixRank.java renamed to src/main/java/com/thealgorithms/matrix/MatrixRank.java

@@ -1,4 +1,6 @@
-package com.thealgorithms.maths;
+package com.thealgorithms.matrix;
+
+import static com.thealgorithms.matrix.utils.MatrixUtil.validateInputMatrix;
 
 /**
  * This class provides a method to compute the rank of a matrix.
@@ -63,47 +65,6 @@ private static double[][] deepCopy(double[][] matrix) {
         return matrixCopy;
     }
 
-    private static void validateInputMatrix(double[][] matrix) {
-        if (matrix == null) {
-            throw new IllegalArgumentException("The input matrix cannot be null");
-        }
-        if (matrix.length == 0) {
-            throw new IllegalArgumentException("The input matrix cannot be empty");
-        }
-        if (!hasValidRows(matrix)) {
-            throw new IllegalArgumentException("The input matrix cannot have null or empty rows");
-        }
-        if (isJaggedMatrix(matrix)) {
-            throw new IllegalArgumentException("The input matrix cannot be jagged");
-        }
-    }
-
-    private static boolean hasValidRows(double[][] matrix) {
-        for (double[] row : matrix) {
-            if (row == null || row.length == 0) {
-                return false;
-            }
-        }
-        return true;
-    }
-
-    /**
-     * @brief Checks if the input matrix is a jagged matrix.
-     * Jagged matrix is a matrix where the number of columns in each row is not the same.
-     *
-     * @param matrix The input matrix
-     * @return True if the input matrix is a jagged matrix, false otherwise
-     */
-    private static boolean isJaggedMatrix(double[][] matrix) {
-        int numColumns = matrix[0].length;
-        for (double[] row : matrix) {
-            if (row.length != numColumns) {
-                return true;
-            }
-        }
-        return false;
-    }
-
     /**
      * @brief The pivot row is the row in the matrix that is used to eliminate other rows and reduce the matrix to its row echelon form.
      * The pivot row is selected as the first row (from top to bottom) where the value in the current column (the pivot column) is not zero.

src/main/java/com/thealgorithms/matrix/MirrorOfMatrix.java

@@ -1,6 +1,9 @@
 package com.thealgorithms.matrix;
 
 // Problem Statement
+
+import com.thealgorithms.matrix.utils.MatrixUtil;
+
 /*
 We have given an array of m x n (where m is the number of rows and n is the number of columns).
 Print the new matrix in such a way that the new matrix is the mirror image of the original matrix.
@@ -17,41 +20,17 @@ public final class MirrorOfMatrix {
     private MirrorOfMatrix() {
     }
 
-    public static int[][] mirrorMatrix(final int[][] originalMatrix) {
-        if (originalMatrix == null) {
-            // Handle invalid input
-            return null;
-        }
-        if (originalMatrix.length == 0) {
-            return new int[0][0];
-        }
-
-        checkInput(originalMatrix);
+    public static double[][] mirrorMatrix(final double[][] originalMatrix) {
+        MatrixUtil.validateInputMatrix(originalMatrix);
 
         int numRows = originalMatrix.length;
         int numCols = originalMatrix[0].length;
 
-        int[][] mirroredMatrix = new int[numRows][numCols];
+        double[][] mirroredMatrix = new double[numRows][numCols];
 
         for (int i = 0; i < numRows; i++) {
-            mirroredMatrix[i] = reverseRow(originalMatrix[i]);
+            mirroredMatrix[i] = MatrixUtil.reverseRow(originalMatrix[i]);
         }
         return mirroredMatrix;
     }
-    private static int[] reverseRow(final int[] inRow) {
-        int[] res = new int[inRow.length];
-        for (int i = 0; i < inRow.length; ++i) {
-            res[i] = inRow[inRow.length - 1 - i];
-        }
-        return res;
-    }
-
-    private static void checkInput(final int[][] matrix) {
-        // Check if all rows have the same number of columns
-        for (int i = 1; i < matrix.length; i++) {
-            if (matrix[i].length != matrix[0].length) {
-                throw new IllegalArgumentException("The input is not a matrix.");
-            }
-        }
-    }
 }