About Question enthuware.ocpjp.v7.2.1326 :

[arnoldnitesh]

Where it is written that Color and a boolean flag can't be in a shape interface as static members ?

property can be constant also.

[admin]

Did you even read the explanation?
-Paul.

[arnoldnitesh]

i am not talking about explanation of answer, i am talking about question , from where can i get that your question is talking about instance variable not constant ?

[admin]

In OO concepts we always talk about instance fields. Static fields are not considered part of OOP.

[The_Nick]

Typo "valid declaration" not "valid the declaration"

The_Nick.