In a personal affairs management system for college students, there may be the following public and protected attributes and methods:
Public:
1. User interface methods: used to interact with users, receive and display user input information, and provide feedback and results to users.
2. Database management methods: used to manage and store user's personal information, tasks, notes, and other data, and provide data query and update functions.
3. Authentication and authorization methods: used to verify user identity and authorize access to different functions and resources in the system.
4. Task management methods: used to create, edit, delete, and track user's tasks and to-do items, and provide task priority and deadline settings.
5. Calendar methods: used to display user's schedule and important dates, and provide reminder and notification functions.
6. Note management methods: used to create, edit, delete, and organize user's notes and documents, and provide search and filter functions.
Protected:
1. Data storage methods: used to store and retrieve user's personal information, tasks, notes, and other data in a secure manner.
2. Access control methods: used to control access to sensitive user data and functions within the system.
3. Error handling methods: used to handle errors and exceptions that may occur during system operation.
4. Utility methods: used to perform various utility functions such as data validation, formatting, and conversion.