can any one please give a very simple code to understand composition and aggregation in language java , Thank you.

Question

language sholud be java

Answer 1

Hi Rehan, is this a homework question? Please clarify what exactly you need help with, so that our lovely community members can attempt to assist you. Cheers.

Answer 2

Okay, good to hear. It would be best if you could show your code attempt, so the community can assist you. 😊👍

Answer 3

no Sir Anthony Quick , this is not a home work question ,i was trying to make my concepts strong in java , so when i go through composition ,i was facing problem that why are we refrencing object of other class in constructor ,, like their are two classes , first of job and other of person , so we are initializing object of job in person constructor . ,,, why is that so ,,,,, i hope i made my question clear , if not so please tell me ill post the whole code which i had done ......

Answer 4

ok Sir Anthony Quick

Answer 5

Sir Anthony Quick

here's the code :

class job
{

private int id;

private String role;

public void setId(int id_set)
{

id=id_set;

}

public int getId()
{
return id;
}

public void setRole(String role_set)
{
role=role_set;
}

public String getRole()
{
return role;
}

}

class person
{

private job j;

person()
{

j= new job();

j.setId(12);

j.setRole("manager");

}

public String getResult()
{
return j.getRole();
}

public int GetID()
{
return j.getId();
}

}

public class Main {

public static void main(String[] args) {

person p = new person();

System.out.println(p.getResult() ) ;

System.out.println(p.GetID() );
}

}