Merge pull request aimacode#100 from atyamsriharsha/atyamsriharsha-patch-2

Update Point2D.java, looks good.

Author: ctjoreilly

aima-core/src/main/java/aima/core/util/datastructure/Point2D.java

@@ -42,8 +42,13 @@ public double getY() {
 	 * @return the Euclidean distance between a specified point and this point.
 	 */
 	public double distance(Point2D pt) {
-		double result = (pt.getX() - x) * (pt.getX() - x);
-		result += (pt.getY() - y) * (pt.getY() - y);
-		return Math.sqrt(result);
+		// Distance Between X Coordinates
+		double x_distance = (pt.getX() - x) * (pt.getX() - x);
+		// Distance Between Y Coordinates
+		double y_distance = (pt.getY()-y)*(pt.getY()-y) ;
+		// Distance Between 2d Points
+		double total_distance = Math.sqrt(x_distance + y_distance) ;
+		
+		return total_distance ;
 	}
 }