Java Aggregation

package javaapplication2;
class Address {
 int postal;
 String street;
 String city;
 String country;

 Address(int p,String s,String c,String co){
 postal = p;
 street = s;
 city = c;
 country =co;
 }

}


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class Employee {
 int id;
 String name;
 double salary;
 Address address;

 Employee(int i, String n,double s,Address a){
 id = i;
 name = n;
 salary = s;
 address = a;
 }


}
public class JavaApplication2 {
 public static void main(String[] args) {

 Address a = new Address(1234,"king fahad","riyadh","KSA");

 Employee e = new Employee(1,"Saleh",8000,a);


 System.out.println("ID: "+e.id);
 System.out.println("NAME: "+e.name);
 System.out.println("SALARY: "+e.salary);
 System.out.println("POSTAL: "+e.address.postal);
 System.out.println("STREET: "+e.address.street);
 System.out.println("CITY: "+e.address.city);
 System.out.println("COUNTRY: "+e.address.country);

 }

}