fix: refactored code and applied baeldung code formatter

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/percentdiffbetweentwonumbers/PercentDiffBetweenTwoNumbers.java

@@ -1,11 +1,12 @@
 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.");
+
+    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;
     }
-    return Math.abs((v1 - v2) / average) * 100;
-  }
 }

core-java-modules/core-java-lang-math-4/src/test/java/com/baeldung/math/percentdiffbetweentwonumberstest/PercentDiffBetweenTwoNumbersUnitTest.java

@@ -3,79 +3,71 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
-import com.baeldung.math.percentdiffbetweentwonumbers.PercentDiffBetweenTwoNumbers;
 import org.junit.jupiter.api.Test;
+
+import com.baeldung.math.percentdiffbetweentwonumbers.PercentDiffBetweenTwoNumbers;
+
 class PercentDiffBetweenTwoNumbersUnitTest {
 
-  @Test
-  void whenCalculatePercentageDifferenceBetweenTwoNumbers_thenCorrectResult() {
-    double v1 = 50.0;
-    double v2 = 70.0;
-    double expected = 33.33;
-    double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
-    assertEquals(expected, result, 0.01, "Percentage difference should be correctly calculated.");
-  }
+    @Test
+    void whenCalculatePercentageDifferenceBetweenTwoNumbers_thenCorrectResult() {
+        double v1 = 50.0;
+        double v2 = 70.0;
+        double expected = 33.33;
+        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 expected = 0.0;
-    double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
-    assertEquals(
-        expected, result, "Percentage difference should be zero when both values are equal.");
-  }
+    @Test
+    void whenv1Andv2AreEqual_thenPercentageDifferenceIsZero() {
+        double v1 = 50.0;
+        double v2 = 50.0;
+        double expected = 0.0;
+        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 expected = 33.33;
-    double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
-    assertEquals(expected, result, 0.01, "Percentage difference should be correctly calculated.");
-  }
+    @Test
+    void whenv1IsGreaterThanv2_thenCalculateCorrectPercentageDifference() {
+        double v1 = 70.0;
+        double v2 = 50.0;
+        double expected = 33.33;
+        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 expected = 33.33;
-    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 expected = 33.33;
+        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 expected = 200.0;
-    double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
-    assertEquals(
-        expected,
-        result,
-        "Percentage difference should be correctly calculated when one value is zero.");
-  }
+    @Test
+    void whenOneValueIsZero_thenCalculateCorrectPercentageDifference() {
+        double v1 = 0.0;
+        double v2 = 50.0;
+        double expected = 200.0;
+        double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
+        assertEquals(expected, result, "Percentage difference should be correctly calculated when one value is zero.");
+    }
 
-  @Test
-  void whenAverageIsZero_thenThrowIllegalArgumentException() {
-    double v1 = -50.0;
-    double v2 = 50.0;
-    assertThrows(
-        IllegalArgumentException.class,
-        () -> PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2),
-        "Should throw IllegalArgumentException when the average of V1 and V2 is zero.");
-  }
+    @Test
+    void whenAverageIsZero_thenThrowIllegalArgumentException() {
+        double v1 = -50.0;
+        double v2 = 50.0;
+        assertThrows(IllegalArgumentException.class, () -> 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 = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
-    double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v2, v1);
-    assertEquals(
-        expected,
-        result,
-        0.01,
-        "Percentage difference should be the same when V1 and V2 are swapped.");
-  }
+    @Test
+    void whenv1Andv2AreSwapped_thenPercentageDifferenceIsSame() {
+        double v1 = 70.0;
+        double v2 = 50.0;
+        double expected = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v1, v2);
+        double result = PercentDiffBetweenTwoNumbers.calculatePercentageDifference(v2, v1);
+        assertEquals(expected, result, 0.01, "Percentage difference should be the same when v1 and v2 are swapped.");
+    }
 }