Aggragation

Aggragation.java

class Adresa {
    private String strada;
    private String oras;
    private String codPostal;

    public Adresa(String strada, String oras, String codPostal) {
        this.strada = strada;
        this.oras = oras;
        this.codPostal = codPostal;
    }

    // Override toString() to display address details
    @Override
    public String toString() {
        return "Adresa: " + strada + ", " + oras + ", " + codPostal;
    }
}

class Student {
    private String nume;
    private Adresa adresa; // Aggregation - Student "has a" Address

    public Student(String nume, Adresa adresa) {
        this.nume = nume;
        this.adresa = adresa;
    }

    // Override toString() to display student details
    @Override
    public String toString() {
        return "Student: " + nume + ", " + adresa;
    }
}

public class Main {
    public static void main(String[] args) {
        // Creating an address object
        Adresa adresa = new Adresa("Strada Exemplu", "București", "123456");

        // Creating student objects
        Student student1 = new Student("Ion", adresa);
        Student student2 = new Student("Maria", adresa); // Address can be shared

        // Printing the details
        System.out.println(student1);
        System.out.println(student2);
    }
}