It uses Java and C. Strictly speaking there's no reason you have to use either language, you can also use the design in the language of your choice (assuming su

It uses Java and C. Strictly speaking there's no reason you have to use either language, you can also use the design in the language of your choice (assuming sufficiently matching semantics, like C# or Kotlin instead of Java for Part 1, or a willingness to put in more legwork if you go further afield).