What makes the difference between the two examples below?

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Java

OOP

what makes composition different from aggregation they are both declared as private, is it in composition example we are creating an object of Address class in constructor of Person, if it's then how this makes the Person object control/own the Address object.

Composition Example:

public class Person {

private String firstName;
private String lastName;
private Address address;

//Composition example
public Person() {
    address = new Address();
}



public Address getAddress() {
    return address;
}


}

Aggregation example

Employee Class

public class Employee {

private String firstName;
private String lastName;
private int age;

//Aggregation Java example
private Address address;


public void setAddress(Address address) {
    this.address = address;
}
public Address getAddress() {
    return address;
}

}

What I have tried:

there was nothing i could try.