Can you list and explain the main methods implemented in object-oriented programming?

In object-oriented programming (OOP), the main methods that are often implemented in classes include:

• Constructors — special methods for initializing objects upon creation.
• Getters and setters — methods for accessing and modifying the values of class fields (encapsulation).
• Override methods (toString(), equals(), hashCode()) — often overridden for correct object comparison, outputting them as strings, and use in collections.
• Business logic methods — task-specific methods implementing the behavior of the object.

For example, in Android, lifecycle methods of an activity (onCreate(), onStart(), onResume(), etc.) are often overridden to manage the application's state.

Example of overriding the toString() method:

@Override
public String toString() {
    return "User{name='" + name + "', age=" + age + "}";
}

Thus, the main methods are those that ensure the creation, state management, and behavior of objects in accordance with OOP principles.