New Era University Structure -Composite Design Pattern

This Java program models the organizational structure of New Era University using the Composite Design Pattern, strictly following Object-Oriented Programming principles .

Class Structure

• UniversityComponent.java – Interface that defines all common operations
• Student.java – Leaf node representing a student
• Teacher.java – Leaf node representing a teacher
• Department.java – Composite node representing a department
• College.java – Composite node representing a college or sub-college
• Main.java – Client code that builds and demonstrates the university structure

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Sample Output

College: New Era University

College: College of Informatics and Computing Studies

Department: Computer Science
Teacher: Prof. Esperanza
Subject: Java
Salary: ₱55000.0
Student: Wonks
ID: S001
Tuition ₱ 25000.0
Student: Juls
ID: S002
Tuition ₱ 27000.0

Department: Information Technology
Teacher: Prof. Simbulan
Subject: Cyber Security
Salary: ₱50000.0
Student: Binse
ID: S003
Tuition ₱ 26000.0

Total Students: 3
Total Budget: ₱27000.0

📌 Notes

• add() and remove() operations are only supported by composite classes (College, Department).
• Leaf classes (Student, Teacher) throw UnsupportedOperationException on add/remove.
• Budget is calculated as: Total Teacher Salaries − Total Student Tuition Fees

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UML Diagram