Do you use the encapsulation principle in your projects?

Yes, I actively use the principle of encapsulation in project development. It helps hide the internal details of class or module implementation and provides only the necessary interface for interaction. This improves code maintainability and extensibility, as well as reduces the likelihood of errors due to incorrect use of internal data.

For example, in object-oriented programming, I make class fields private and provide public methods for accessing and modifying these fields:

public class User {
    private String password; // hidden field

    public void setPassword(String password) {
        // password complexity check can be added
        this.password = password;
    }

    public boolean checkPassword(String input) {
        return this.password.equals(input);
    }
}

Thus, the internal state of the object is protected, and interaction with it is controlled.