Java inheritance Presentation with Examples
- 1. Object Oriented Programming Lab CS123 Noushin Saba Asfand Yar
- 3. Inheritance • One class acquires the properties and behavior of another class • Represents a parent-child relationship between two classes • Subclass • A subclass, also known as a child class or derived class, is the class that inherits the properties and behaviors of another class • Superclass • A superclass, also known as a parent class or base class, is a class whose properties and behaviors are inherited by the subclass • Implemented using the extends keyword
- 4. Account Class • Superclass • Attributes • accountNumber, balance, and withdrawal limits • Constructor • No argument constructor • Parameterized constructor • Methods • Set and get methods • Depositing amount • Withdrawing amount • Calculating interest • Displaying account information
- 5. CheckingAccount Class • Subclass inherited from Account • Attributes • Overdraft Limit • Constructor • No argument constructor • Parameterized constructor • Methods • Get and set methods • Overrides withdraw method to handle overdrafts • Overrides display information
- 6. Tasks Task 1: Saving Account inherited from Account class • Create a SavingAccount subclass with the following: • Attributes • Interest rate • Constructor • No argument constructor • Parameterized constructor • Methods • Get and set methods • Override calculate interest method • Override display information • Write main to check the functionality of SavingAccount
- 7. Tasks • Task 2: Employee, Manager, Team Lead Employee: This is the base class representing generic employees in the company. It might contain attributes like name, employee ID, and methods for calculating salary or displaying employee information. Manager: The Manager class inherits from Employee and adds specific attributes and behaviors relevant to managers, such as managing a team, approving leave requests, or conducting performance reviews. TeamLead: The TeamLead class further specializes in Managers. It inherits all the attributes and behaviors of a Manager but may add additional features specific to team leaders, like assigning tasks, mentoring team members, or coordinating team meetings.
- 8. Tasks • Employee class • Attributes • Name (first, last) • Employee ID • Employment status – Active • Hire date • Email address • Phone number • Department • Position • Salary • Methods • Get and Set Method • Promote (change position) • Terminate (change employment status) • Manager class • Attributes • Direct Reports (List of Employees) • Project (List) • Methods • Add direct reports • Assign Projects • Evaluate Performance • TeamLead class • Attributes • Team name • Team Tasks (List) • Methods • Hold team meeting • Add and display team tasks