DistanceBetweenTwoPoints.java

Author: Gopesh111

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

@@ -1,29 +1,40 @@
+package com.thealgorithms.maths;
+
 /**
- * Distance Between Two Points in 2D Space
+ * Distance Between Two Points in 2D Space.
+ *
+ * <p>This class provides a method to calculate the Euclidean distance
+ * between two points in a two-dimensional plane.</p>
  *
- * Reference:
- * https://en.wikipedia.org/wiki/Euclidean_distance
+ * <p>Formula:
+ * d = √((x2 − x1)² + (y2 − y1)²)</p>
+ *
+ * <p>Reference:
+ * https://en.wikipedia.org/wiki/Euclidean_distance</p>
  */
-public class DistanceBetweenTwoPoints {
+public final class DistanceBetweenTwoPoints {
+
+    private DistanceBetweenTwoPoints() {
+        // Utility class; prevent instantiation
+    }
 
     /**
      * Calculate the Euclidean distance between two points.
      *
-     * @param x1 x-coordinate of first point
-     * @param y1 y-coordinate of first point
-     * @param x2 x-coordinate of second point
-     * @param y2 y-coordinate of second point
-     * @return Euclidean distance
+     * @param x1 x-coordinate of the first point
+     * @param y1 y-coordinate of the first point
+     * @param x2 x-coordinate of the second point
+     * @param y2 y-coordinate of the second point
+     * @return Euclidean distance between the two points
      */
     public static double calculate(
-            double x1, double y1, double x2, double y2) {
+            final double x1,
+            final double y1,
+            final double x2,
+            final double y2) {
 
         return Math.sqrt(
                 Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2)
         );
     }
-
-    public static void main(String[] args) {
-        System.out.println(calculate(0, 0, 3, 4)); // 5.0
-    }
 }