About Question enthuware.ocpjp.v7.2.1470 :

[sir_Anduin@yahoo.de]

The produce method simply sets the flag to true and notifies anybody who has called wait.

In your answer you have the procude method set the flag to false

If it is not true, it waits until it is notified by the produce method

in the given anser it will wait if is is true...

If it is true, it simply sets it to false.

if false, the flag is set to true in the given answer.


This statements and answers confuse me, you cou clarify?

Thanks

Aleks

[admin]

There are actually two correct answers and both are very similar.
Answer 1:
produce() sets the flag to false (signifying that there is nothing to produce anymore) and notifies all.
consume() checks for flag to be true and if the flag is true (implying that something needs to be produced), it waits. if the flag is false (implying there is no need to produce), it sets the flag to true (implying someone needs to produce something).

Answer 2:
produce() sets the flag to true (signifying that something has been produced) and notifies all.
consume() checks for flag to be false (i.e. while( !flag ) ) and if the flag is false implying that production is not ready, it waits. if the flag is true, it sets the flag to false (implying that item has been consumed and someone needs to produce something now).

HTH,
Paul.

[Harvey Manfrenjensen]

Should it not be in the explanation

Code: Select all

final ProdCon pc =  new ProdCon();

instead of

Code: Select all

ProdCon pc =  new ProdCon();

?

Regards Paul

[admin]

Not really. It is effectively final already because none of the anonymous inner classes try to modify it.