Clean code

[oswetto]

Add missing class name
Add missing method name
Add missing inheritDoc
Add final modifier
Repalce import Stack with Deque

[rbri]

Hi @oswetto,

thanks for the PR, looks good.
Can you please fix the remaining checkstyle issues ....

And maybe you can provide a short hint why you have replaced the Stack with Deque

Thanks, Ronald

[oswetto]

Hello @rbri errors are fixed.

Oracle suggest repalce Stack with Deque

The Stack class extends class Vector. with five operations that allow a vector to be treated as a stack. The usual push and pop operations are provided, as well as a method to peek at the top item on the stack, a method to test for whether the stack is empty, and a method to search the stack for an item and discover how far it is from the top.
When a stack is first created, it contains no items.

A more complete and consistent set of LIFO stack operations is provided by the Deque interface and its implementations, which should be used in preference to this class.

https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Stack.html

[rbri]

Thanks!