Die Anfrage
“Create a UML class diagram for a client that uses a singleton Logger with a static instance, a getInstance method and a log method.”
Dann probieren SieAdd a LoggerFactory that returns the Logger.Add a private log level field to Logger.
Was diese Zeichnung zeigt
Die dahinterstehenden Entscheidungen verstehen.
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).