Implement Parentheses Generator

[sozelfist]

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[vil02]

Two questions (just questions, I want to know your reasons):

• why did you use List<String> and not another container? (maybe set),
• what do you think about marking methods of ParenthesesGenerator as static?

In general the code looks good.

[sozelfist]

Two questions (just questions, I want to know your reasons):

• why did you use List<String> and not another container? (maybe set),
• what do you think about marking methods of ParenthesesGenerator as static?

In general the code looks good.

1. The List<String> data structure was chosen for its simplicity and efficiency in this implementation. Using a List allows us maintain the order of generated parentheses combinations. While a Set<String> could ensure uniqueness of combinations, it might not preserve the order of generation, which could be important in some cases.

2. Marking the methods of ParenthesesGenerator as static could be appropriate depending on the intended usage and design considerations. If the methods do not rely on instance-specific state or behavior, marking them as static could enhance code readability and usage simplicity. Static methods can be called without needing to instantiate an object of the class, which can be beneficial in scenarios where the class serves primarily as a utility or helper. However, if the methods need access to instance variables or if there is a possibility of different instances requiring different behaviors, then keeping them as instance methods would be more appropriate.

3. In the case of the ParenthesesGenerator class, marking the methods as static could be appropriate since the methods do not rely on instance-specific state or behavior. They operate solely on the input parameters provided to them and do not require access to any instance variables. Therefore, marking the methods as static would make the class more of a utility or helper class, simplifying its usage by allowing clients to call the methods directly without instantiating an object of the class. This approach enhances code readability and promotes a clearer separation of concerns.

[sozelfist]

I will change ParathensesGenerator's methods to static later. Appreciate your questions @vil02

[vil02]

Almost done!