refactored package

Signed-off-by: Emmanuel Mireku Omari <omariemmanuel91@gmail.com>

Author: 3ga01

core-java-modules/core-java-lang-math-4/src/main/java/com/baeldung/math/percentagedifferecebetweentwonumbers/PercentageDifferenceBetweenTwoNumbers.java

@@ -0,0 +1,11 @@
+package com.baeldung.math.percentdiffbetweentwonumbers;
+
+public class PercentDiffBetweenTwoNumbers {
+  public static double calculatePercentageDifference(double v1, double V2) {
+    double average = (v1 + V2) / 2;
+    if (average == 0) {
+      throw new IllegalArgumentException("The average of V1 and V2 cannot be zero.");
+    }
+    return Math.abs((v1 - V2) / average) * 100;
+  }
+}

core-java-modules/core-java-lang-math-4/src/main/java/com/baeldung/math/percentdiffbetweentwonumbers/PercentDiffBetweenTwoNumbers.java

@@ -1,56 +1,55 @@
-package com.baeldung.math.percentagedifferencebetweentwonumberstest;
+package com.baeldung.math.percentdiffbetweentwonumberstest;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
-import com.baeldung.math.percentagedifferecebetweentwonumbers.PercentageDifferenceBetweenTwoNumbers;
+import com.baeldung.math.percentdiffbetweentwonumbers.PercentDiffBetweenTwoNumbers;
 import org.junit.jupiter.api.Test;
-
-class PercentageDifferenceBetweenTwoNumbersUnitTest {
+class PercentDiffBetweenTwoNumbersUnitTest {
 
   @Test
   void whenCalculatePercentageDifferenceBetweenTwoNumbers_thenCorrectResult() {
-    double V1 = 50.0;
-    double V2 = 70.0;
+    double v1 = 50.0;
+    double v2 = 70.0;
     double expected = 33.33;
-    double result = PercentageDifferenceBetweenTwoNumbers.calculatePercentageDifference(V1, V2);
+    double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
     assertEquals(expected, result, 0.01, "Percentage difference should be correctly calculated.");
   }
 
   @Test
   void whenV1AndV2AreEqual_thenPercentageDifferenceIsZero() {
-    double V1 = 50.0;
-    double V2 = 50.0;
+    double v1 = 50.0;
+    double v2 = 50.0;
     double expected = 0.0;
-    double result = PercentageDifferenceBetweenTwoNumbers.calculatePercentageDifference(V1, V2);
+    double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
     assertEquals(
         expected, result, "Percentage difference should be zero when both values are equal.");
   }
 
   @Test
   void whenV1IsGreaterThanV2_thenCalculateCorrectPercentageDifference() {
-    double V1 = 70.0;
-    double V2 = 50.0;
+    double v1 = 70.0;
+    double v2 = 50.0;
     double expected = 33.33;
-    double result = PercentageDifferenceBetweenTwoNumbers.calculatePercentageDifference(V1, V2);
+    double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
     assertEquals(expected, result, 0.01, "Percentage difference should be correctly calculated.");
   }
 
   @Test
   void whenV2IsGreaterThanV1_thenCalculateCorrectPercentageDifference() {
-    double V1 = 50.0;
-    double V2 = 70.0;
+    double v1 = 50.0;
+    double v2 = 70.0;
     double expected = 33.33;
-    double result = PercentageDifferenceBetweenTwoNumbers.calculatePercentageDifference(V1, V2);
+    double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
     assertEquals(expected, result, 0.01, "Percentage difference should be correctly calculated.");
   }
 
   @Test
   void whenOneValueIsZero_thenCalculateCorrectPercentageDifference() {
-    double V1 = 0.0;
-    double V2 = 50.0;
+    double v1 = 0.0;
+    double v2 = 50.0;
     double expected = 200.0;
-    double result = PercentageDifferenceBetweenTwoNumbers.calculatePercentageDifference(V1, V2);
+    double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
     assertEquals(
         expected,
         result,
@@ -59,20 +58,20 @@ void whenOneValueIsZero_thenCalculateCorrectPercentageDifference() {
 
   @Test
   void whenAverageIsZero_thenThrowIllegalArgumentException() {
-    double V1 = -50.0;
-    double V2 = 50.0;
+    double v1 = -50.0;
+    double v2 = 50.0;
     assertThrows(
         IllegalArgumentException.class,
-        () -> PercentageDifferenceBetweenTwoNumbers.calculatePercentageDifference(V1, V2),
+        () -> PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2),
         "Should throw IllegalArgumentException when the average of V1 and V2 is zero.");
   }
 
   @Test
   void whenV1AndV2AreSwapped_thenPercentageDifferenceIsSame() {
-    double V1 = 70.0;
-    double V2 = 50.0;
-    double expected = PercentageDifferenceBetweenTwoNumbers.calculatePercentageDifference(V1, V2);
-    double result = PercentageDifferenceBetweenTwoNumbers.calculatePercentageDifference(V2, V1);
+    double v1 = 70.0;
+    double v2 = 50.0;
+    double expected = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
+    double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v2, v1);
     assertEquals(
         expected,
         result,