What are the advantages and disadvantages of using dependency injection through constructors for Bean objects?

Advantages of dependency injection through constructor:

• Ensures the immutability of the object after creation, as all dependencies are passed at once.
• Allows explicit visibility of all class dependencies, which improves code readability and maintainability.
• Simplifies testing, as dependencies can be easily replaced when creating the object.

Disadvantages:

• With a large number of dependencies, the constructor can become cumbersome.
• Not suitable for optional dependencies without using additional patterns.

Example:

public class Service {
    private final Repository repository;

    public Service(Repository repository) {
        this.repository = repository;
    }

    // class methods
}