Wäre eine Zusammenfassung für die Umsetzung

Formatierung

Spring Dependency Injection

Siehe https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-dependencies:

Constructor-based or setter-based DI?

Since you can mix constructor-based and setter-based DI, it is a good rule of thumb to use constructors for mandatory dependencies and setter methods or configuration methods for optional dependencies.
…
The Spring team generally advocates constructor injection, as it lets you implement application components as immutable objects and ensures that required dependencies are not null.
…
Setter injection should primarily only be used for optional dependencies that can be assigned reasonable default values within the class. …

public class MyClass {

    @Autowired
    private MyDependency myDependency;
}

Koding

Util Klassen

• Name endet auf “Utils”, z.B. “MyUtils”
• Haben einen privaten Konstruktor der Art:

  private MyUtils() {
        throw new AssertionError("No MyUtils instances for you!");
  }
  

  passendes Eclipse Editor Template:

  private ${enclosing_type}() {
      throw new AssertionError("No ${enclosing_type} instances for you!");
  }
  

  (siehe auch Kode von java.util.Objects.Objects())

Tests

Exceptions

Logging

Siehe …