Using the final keyword

Question about the task

Remembering geometry

Java Syntax, Level 7, Lesson 7

Under discussion

I have added the

final

keyword to all the constants in the class. Yet the code still fails

package en.codegym.task.pro.task06.task0614; /* Remembering geometry */ public class Solution { public static final double pi = 3.14; public static final double radius = 2.5; public static final double diameter = 5; public static void main(String[] args) { System.out.println("The area of the circle is: " + pi * radius * radius); System.out.println("The perimeter of the circle is: " + pi * diameter); } }

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Michael Amann Full Stack Developer

7 April 2022, 19:44

Mine is worse. I have final added to the radius variable and it still says "Be sure that the radius variable has the final modifier..." Too funny.

Nikita Petrov Controls engineer

18 March 2022, 07:41

As said before, "pi" is a constant and "radius"/"diameter" may be not. But if I add "final" modifier to all of them, then the compile result is "Be sure that the radius variable has the final modifier." It's misleading.

Maven

Level 17 , United States of America, USA

12 March 2022, 22:24

Constants vs. Variable. This question is tricky with the terminology

Gellert Varga

Level 23 , Szekesfehervar, Hungary

22 December 2021, 23:08

The shared code did this: "The final modifier are set on all variables". But the task says this: "The final modifier must be set on all constants". Here, probably, pi (a mathematical constant, an absolutely immutable value) is the only one constant. But radius and diameter can be any size.

Lisa

Level 41

19 December 2021, 09:52

You'll need to look at that task in a more abstract way. In this example of course all variables may be final. But in a more complex program some of these variables may change and some may be constant.