Closing the electrical panel before JDK 17 – Sealed and Hidden Classes

166. Closing the electrical panel before JDK 17 By its nature, an electrical panel is a closed unit of work. But, our code from the previous problem is far away ... Read MoreRead More

0 Comments 2021-08-19

Introducing the permits clause – Sealed and Hidden Classes

168. Introducing the permits clause In the previous problem, you saw how to write a closed hierarchical model in a single source file. Next, let’s use the Fuel.java source file ... Read MoreRead More

0 Comments 2021-04-27

Closing the electrical panel after JDK 17 – Sealed and Hidden Classes

169. Closing the electrical panel after JDK 17 Do you remember our electrical panel model introduced earlier in Problems X and Y? In Problem Y, we closed this model as ... Read MoreRead More

0 Comments 2021-03-20