需求
“Create a UML class diagram for a client that uses a singleton Logger with a static instance, a getInstance method and a log method.”
接著試試Add a LoggerFactory that returns the Logger.Add a private log level field to Logger.
這張圖裡有什麼
看懂背後的決策。
01
Logger class with private instance and constructor
02
Static getInstance() method for controlled access
03
Client dependency on Logger through the static method
When a class must have exactly one instance, and a global point of access is needed (e.g., logging, configuration, thread pools).