Association, composition, aggregation in java

Question

Is there any special keyword or piece of code used for aggregation composition and Association like we use extends for inheritance?

Answer 1

No, because as code it can be same and it depends in context.

If I speculate about it,
aggregation is closer to reference types and there is usually keyword 'new'. Or generic <> diamond can be there
composition might be more with 'final' keyword

but these are not rules