Confusion with exam objective

Ranch Hand

Posts: 90

posted 11 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

I am preparing for the OCP Java7 certification. I am unable to understand the following exam objective:

"Apply object composition principles"

Can anyone please help explain this objective. Are there multiple composition principles or just one - define a variable of type A in type B, if you want to use the functionality of A in B, rather than maling type B inherit type A?

cheers
Andy

Andy James

Ranch Hand

Posts: 90

posted 11 years ago

Number of slices to send:

Optional 'thank-you' note:

Send

Can anyone please answer to this query?

Andy

Friends help you move. Good friends help you move bodies. This tiny ad will help:

a bit of art, as a gift, that will fit in a stocking

https://gardener-gift.com