Containership

  • In Inheritance, if a class B is derived from class A, B has all characteristics of A in addition to its own.
  • Hence you can say that "B is a kind of A". So, inheritance is sometimes called as a "kind of" relationship.
  • There is another kind of relationship called a "has a" relationship, or containership. In OOP, this relation occurs when you have an object of class A in class B as shown. 
    For example 
class A { };
class B {A a;	// A is contained in B
};
    Click Here For example


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