Are Local Refernece varibles also called as Composition?

Question

Java_Composition: A class can have references to objects of other classes as members.

Question?: Should that be a Instance-variable of a class to call it as Composition Or it is also called as Composition, if it is a Local-variable ?

Demo: Preceding question for local reference-type variables at lines 5 and 6.

1   public class EmployeeTest
2   {
3   public static void main(String[] args)
4   {
5     Date birthday;
6     Date birth = new Date(12, 12, 1950);
7   }
8   }

Are you asking if `birth` is an instance variable of `EmployeeTest`? — Carcigenicate, Jun 11 '17 at 15:56
Local variables are not members of the class. They come and go as the method is entered and exited. They are not involved in either composition or inheritance. — Andy Thomas, Jun 11 '17 at 16:04
You asking - if declared variable(object) is local or instance, can we call both as Composition? — Blasanka, Jun 11 '17 at 16:09

score 1 · Answer 1 · answered Jul 20 '17 at 18:56

Should that be a Instance-variable of a class to call it as Composition Or it is also called as Composition, if it is a Local-variable?

Not really, remember Composition is also known as HAS-A relationship,

so ask yourself the question:

EmployeeTest has a date?

the answer is NO, the date is only scoped in a method and nowhere else...

so that is not Composition.

Are Local Refernece varibles also called as Composition?

1 Answers1