Updated files

Author: Nishitha0730

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

@@ -19,12 +19,9 @@ public static double[][] multiply(double[][] matrixA, double[][] matrixB) {
         }
 
         // Check for empty matrices
-        if (matrixA.length == 0
-                || matrixB.length == 0
-                || matrixA[0].length == 0
-                || matrixB[0].length == 0) {
+        if (matrixA.length == 0 || matrixB.length == 0 || matrixA[0].length == 0 || matrixB[0].length == 0) {
             throw new IllegalArgumentException("Input matrices must not be empty");
-        }
+      }
 
         // Validate the matrix dimensions
         if (matrixA[0].length != matrixB.length) {

src/test/java/com/thealgorithms/matrix/MatrixMultiplicationTest.java

@@ -1,10 +1,12 @@
 package com.thealgorithms.matrix;
 
-import org.junit.jupiter.api.Test;
-import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import org.junit.jupiter.api.Test;
+
+
 public class MatrixMultiplicationTest {
 
     private static final double EPSILON = 1e-9; // for floating point comparison
@@ -32,24 +34,21 @@ void testMultiply3by2and2by1() {
     @Test
     void testNullMatrixA() {
         double[][] b = {{1, 2}, {3, 4}};
-        assertThrows(IllegalArgumentException.class,
-                () -> MatrixMultiplication.multiply(null, b));
+        assertThrows(IllegalArgumentException.class, () -> MatrixMultiplication.multiply(null, b));
     }
 
     @Test
     void testNullMatrixB() {
         double[][] a = {{1, 2}, {3, 4}};
-        assertThrows(IllegalArgumentException.class,
-                () -> MatrixMultiplication.multiply(a, null));
+        assertThrows(IllegalArgumentException.class, () -> MatrixMultiplication.multiply(a, null));
     }
 
     @Test
     void testMultiplyNull() {
         double[][] matrixA = {{1.0, 2.0}, {3.0, 4.0}};
         double[][] matrixB = null;
 
-        Exception exception = assertThrows(IllegalArgumentException.class,
-                () -> MatrixMultiplication.multiply(matrixA, matrixB));
+        Exception exception = assertThrows(IllegalArgumentException.class, () -> MatrixMultiplication.multiply(matrixA, matrixB));
 
         String expectedMessage = "Input matrices cannot be null";
         String actualMessage = exception.getMessage();
@@ -61,16 +60,14 @@ void testMultiplyNull() {
     void testIncompatibleDimensions() {
         double[][] a = {{1.0, 2.0}};
         double[][] b = {{1.0, 2.0}};
-        assertThrows(IllegalArgumentException.class,
-                () -> MatrixMultiplication.multiply(a, b));
+        assertThrows(IllegalArgumentException.class, () -> MatrixMultiplication.multiply(a, b));
     }
 
     @Test
     void testEmptyMatrices() {
         double[][] a = new double[0][0];
         double[][] b = new double[0][0];
-        assertThrows(IllegalArgumentException.class,
-                () -> MatrixMultiplication.multiply(a, b));
+        assertThrows(IllegalArgumentException.class, () -> MatrixMultiplication.multiply(a, b));
     }
 
     private void assertMatrixEquals(double[][] expected, double[][] actual) {