Object Composition in Java

Question

In an enterprise management system, what design principle does the relationship between the 'Office' and 'Employee' classes demonstrate?
 
```java
public class Employee {
    private String name;
    
    public Employee(String name) {
         this.name = name;
    }
    
    public void work() {
         System.out.println(name + " is working.");
    }
}

public class Office {
    private Employee manager;
    
    public Office(Employee manager) {
         this.manager = manager;
    }
    
    public void startDay() {
         manager.work();
    }
}
```

Accepted Answer

Composition, since Office contains an Employee object as a manager.

Answer

Inheritance, as Office extends the functionalities of Employee.

Answer

Encapsulation, due to hiding the internal state of the Employee.

Answer

Polymorphism, because Office can handle multiple types of Employee objects uniformly.

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